Tools

Here's a full list of all the web-based bitcoin tools available on this site.

This is a toolbox for bitcoin programmers.

Never enter your actual private key or seed into a website. This is the easiest way to get your bitcoins stolen.

Blocks

Tools for working with raw block data.

• Block Hash

  tool-68696d6209dcd

  

  Block Hash

  Create a block hash from a block header.

  Random Example

   

  Block Header 0 bytes Block Hash (Natural Byte Order)

  Used internally inside raw block headers

  0 bytes Block Hash (Reverse Byte Order)

  Used externally when searching for blocks on block explorers

  0 bytes

  0 secs
• Block Header

  tool-68696d6209f80

  

  Block Header

  Decode and encode a block header.

  Random Example

  Block:

  Block Header (Hex) 0 bytes

  Block Header (Fields)

  Version

  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

  Previous Block:

  Merkle Root

  Time

  0d

  Bits

  Nonce

  0d

  +1

  Block Hash

  This is the HASH256 of the hex block header. It's also in reverse byte order, because that's how block hashes are displayed in block explorers.

  0 secs
• Merkle Root

  tool-68696d620a1b4

  

  Merkle Root

  Calculate the merkle root from a list of TXIDs.

  Random Example

  Block

  TXID List

  A list of TXIDs separated by spaces, commas, or new lines. Quotes and brackets are ignored.

  The TXIDs should be input in reverse byte order (as they appear on blockchain explorers), but they are converted to natural byte order before the merkle root is calculated.

  TXIDs (0)

   

  Merkle Root (Natural Byte Order)

  The byte order as it comes out of the hash function

  Merkle Root (Reverse Byte Order)

  The byte order as shown on blockchain explorers

  0 secs
• Target Bits

  tool-68696d620a270

  

  Target Bits

  Convert between a target and its compact "bits" representation.

  Current Random Example

  Height:

  Target

  0x

  0 bytes Bits

  0 bytes

  0 secs
• Target Adjustment

  tool-68696d620a384

  

  Target Adjustment

  Calculate the next target value based on the current target and the time between blocks.

  Previous Adjustment

  Current Target

  0x

  0 bytes

  Time (seconds)

  Actual

  0d

  Expected

  0d

  The target adjustment period is 2016 blocks. A block is mined on average every 600 seconds (10 minutes), so the expected time is 2016 * 600 = 1209600 seconds.

  Ratio

  The actual time divided by the expected time. We multiply the current target by this ratio to get the new target.

  New Target (Full Precision)

  0x

  New Target

  0x

  0 bytes

  Note: This target value has been truncated slightly for storage in the bits field of the block header, and that's the target value that's actually used when mining.

  0 secs
• Difficulty

  tool-68696d620a445

  

  Difficulty

  Convert between a target and difficulty.

  Current Random Example

  Height:

  Maximum Target

  0x

  Target

  0x

  0 bytes Difficulty

  0d

  0 secs
• Version Bits

  tool-68696d620a4cb

  

  Version Bits

  Random Example

   

  Bit Field

  0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

  Hex

  0x

  4 bytes

  • Version Bits: Enabled

Transactions

Tools for working with raw transaction data.

• Transaction Builder

  tool-68696d620a64c

  

  Transaction Builder

  Build raw transaction data.

  Random Example

   

  Type

  Legacy Segwit

  Version

  0d

  • Basic Transaction

  Inputs (1)

  Input 0

  TXID

  • Note: This is just a placeholder TXID given as an example.

  VOUT

  0d

  scriptSig (ASM) Sequence

  0x

  [+] Add Input

  Outputs (1)

  Output 0

  Amount (satoshis)

  0d

  scriptPubKey (ASM)

  Type Non-Standard P2PK (Pay To Pubkey) P2PKH (Pay To Pubkey Hash) P2MS (Multisig) P2SH (Pay To Script Hash) P2WPKH (Pay To Witness Pubkey Hash) P2WSH (Pay To Witness Script Hash) P2TR (Pay To Taproot) OP_RETURN (Data)

  [+] Add Output

  Locktime

  0d

  • Block Height

  ---

  Raw Transaction Data

  0100000001aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa0000000000ffffffff0100000000000000000000000000

  • 60 bytes
  • 60 vbytes

  0 secs
• Transaction Splitter

  tool-68696d620a7f8

  

  Transaction Splitter

  Split a raw transaction in to individual fields.

  Random Example

  Transaction Data

  • 0 bytes
  • 0 vbytes

  Result

  0 secs
• TXID

  tool-68696d620a8b4

  

  TXID

  Create a TXID from raw transaction data.

  Random Example

  Transaction Data 0 bytes TXID (Natural Byte Order)

  Used internally inside raw transaction data

  0 bytes TXID (Reverse Byte Order)

  Used externally when searching for transactions on block explorers

  0 bytes Show Details

  0 secs
• wTXID

  tool-68696d620a9d5

  

  wTXID

  Create a wTXID from raw transaction data.

  Random Example

  Transaction Data 0 bytes wTXID (Natural Byte Order) 0 bytes wTXID (Reverse Byte Order)

  Also known as the transaction "hash" when using bitcoin-cli commands

  0 bytes

  0 secs
• Script

  tool-68696d620aaa6

  

  Script

  Decode and encode a script.

  Random ScriptPubKey Random ScriptSig

   

  Hex

  

  0 bytes ASM

  Type Non-Standard P2PK (Pay To Pubkey) P2PKH (Pay To Pubkey Hash) P2MS (Multisig) P2SH (Pay To Script Hash) P2WPKH (Pay To Witness Pubkey Hash) P2WSH (Pay To Witness Script Hash) P2TR (Pay To Taproot) OP_RETURN (Data)

  Address

  0 characters

  0 secs
• Sequence

  tool-68696d620abef

  

  Sequence

  Decode a transaction input's sequence field to see the features enabled.

  Sequence (Little Endian)

  The sequence as found in raw transaction data

  0x

  4 bytes Sequence (Big Endian)

  0x

  4 bytes

  Features

  Locktime Replace-by-Fee Relative Locktime

  Relative Locktime Type

  Time seconds

  Blocks Count

  0 secs
• Relative Locktime

  tool-68696d620ac6e

  

  Relative Locktime

  Construct a relative locktime for a transaction input's sequence field.

  Sequence (Little Endian)

  The sequence as found in raw transaction data

  0x

  4 bytes Sequence (Big Endian)

  0x

  4 bytes

  Sequence (Bit Field)

  0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

  Settings

  Disable Flag Type Flag

  Relative Locktime

  Time Value x 512 = 0 seconds

  Blocks Value

  0 secs

Keys & Addresses

Tools for generating, constructing, and converting raw bitcoin keys and addresses.

• Private Key

  tool-68696d620ad30

  

  Private Key

  Generate a random 256-bit number.

  Generate Random

  Bits

  0 1 0 1 0 1 0 1 1 1 1 1 1 1 0 1 1 0 1 0 0 0 0 0 0 1 1 1 1 1 1 0 1 1 1 0 0 0 1 1 1 0 1 1 1 0 1 0 1 1 0 0 0 1 0 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 1 1 0 0 0 0 1 1 1 1 0 0 1 0 1 0 0 1 1 0 1 1 1 1 0 0 0 1 1 1 0 0 0 1 1 0 0 1 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 1 0 1 1 1 0 1 1 1 0 1 0 0 0 1 0 0 1 0 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 1 0 0 1 0 1 0 1 1 0 0 0 1 0 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 1 1 0 1 0 1 1 0 0 1 0 0 0 1 1 1 0 1 1 1 1 0 0 1 1 1 1 1 1 0 0 1 0 0 0 1 0 1 1 1 1 1 0 0 1 1 0 1 1 1 1 0

  Binary

  0b

  0101010111111101101000000111111011100011101110101100010101000100000000110011000011110010100110111100011100011001000001011000001001001010101101110111010001001001110110110011100100101011000100010010101010011101011001000111011110011111100100010111110011011110

  256 bits Decimal

  0d

  Hexadecimal

  0x

  32 bytes

  Never use a private key generated by a website, or enter your private key into a website. Websites can easily save the private key and use it to steal your bitcoins.

  0 secs
• Public Key

  tool-68696d620afee

  

  Public Key

  Calculate the public key from a private key.

  Generate Random Private Key 0 bytes Public Key

  Coordinates

  x:

  0d

  y:

  0d

  parity:

  A public key is just a point on an elliptic curve. The final public key is these coordinates in hexadecimal.

  Compression

  Compressed (02 or 03 prefix) Uncompressed (04 prefix) x-only (no prefix)

  The elliptic curve is symmetrical along the x-axis, so a compressed public key only needs to store the full x-coordinate and whether the y-coordinate is even or odd.

  An x-only public key is used in Taproot outputs. The corresponding y-coordinate is assumed to be even.

  0 bytes

  Never enter your private key into a website, or use a private key generated by a website. Websites can easily save the private key and use it to steal your bitcoins.

  0 secs
• Address (Base58)

  tool-68696d620b0dd

  

  Address (Base58)

  Encode the hash160 of a public key or script to a legacy address.

  Generate Random

  Prefix

  1 byte

  Type

  P2PKH P2SH P2PKH (Testnet) P2SH (Testnet)

  HASH160

  0 bytes

  Checksum

  0 bytes

  Address

  Base58 encoding of the above data

  0 characters

  0 secs
• Address (Bech32)

  tool-68696d620b0eb

  

  Address (Bech32)

  Encode a P2WPKH, P2WSH, or P2TR locking script to an address.

  Generate Random

  ScriptPubKey

  Version

  OP_0 (P2WPKH or P2WSH) OP_1 (P2TR)

  Data (public key hash or script hash)

  0 bytes

  Hex 0 bytes Type:

  Network

  Mainnet Testnet Regtest

  Address

  Bech32 encoding of the ScriptPubKey

  0 characters

  0 secs
• WIF

  tool-68696d620b153

  

  WIF Private Key

  Convert between a raw private key and Wallet Import Format.

  Generate Random

  Prefix

  1 byte

  Network

  Mainnet Testnet

  Private Key

  0 bytes

  Compression

  1 byte

  Compressed

  True (default) False

  Checksum

  0 bytes

  WIF Private Key

  Base58 encoding of above data

  0 characters

  Never enter your private key into a website, or use a private key generated by a website. Websites can easily save the private key and use it to steal your bitcoins.

  0 secs
• Checksum

  tool-68696d620b1e7

  

  Checksum

  Create a checksum for data.

  Random Example

  Data

  Some bytes of data you want to create a checksum for

  0 bytes

  Checksum

  First 4 bytes of hash256(data)

  Expected:

  Data with Checksum

  The original data with the checksum appended

  0 bytes

  0 secs
• Base58

  tool-68696d620b1f0

  

  Base58

  Convert between hexadecimal and base58 encoding.

  Random Example

  Hex

  0 bytes Base 58

  A legacy address or WIF private key for example

  0 digits

  Steps

   

  0 secs
• Base58Check

  tool-68696d620b256

  

  Base58Check

  Create a checksum for data and then encode to base58.

  Random Example

   

  Data 0 bytes

  Checksum

  Expected:

  Base58Check

  0 characterss

  0 secs
• Bech32

  tool-68696d620b260

  

  Bech32

  Convert between a ScriptPubKey and a Bech32 address.

  Random Example

  ScriptPubKey

  0 bytes Type:

  ScriptPubKey (bytes)

  Version

  Witness Program

  ScriptPubKey (8-bit groups)

  Version

  Witness Program

  0 bits

  ScriptPubKey (5-bit groups)

  Version

  Witness Program

  0 bits

  Checksum Constant

  Bech32 (Version 0: P2WPK, P2WSK) Bech32m (Version 1: P2TR)

  Checksum Algorithm

  Checksum

  Data (Version + Witness Program + Checksum)

  Data (Base32)

  Bech32

  hrp

  bc

  Network

  Mainnet Testnet Regtest

  Separator

  1

  Data

  Address

  0 characters

  0 secs

HD Wallets

Tools for generating seeds and addresses for use in HD wallets.

• Mnemonic Seed

  tool-68696d620b2c9

  

  Mnemonic Seed

  Generate a BIP 39 mnemonic sentence and seed for use in a HD wallet.

  Generate Random Size 128 Bit (12 words) (standard) 160 Bit (15 words) 192 Bit (18 words) 224 Bit (21 words) 256 Bit (24 words) (standard)

  Entropy

  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

  128 bits

  Checksum

  0 0 0 0

  4 bits

  Words

   

  Mnemonic Sentence 0 words Passphrase (optional) extra word Seed

  PBKDF2

  0 bytes

  Never use a seed generated by a website, or enter your seed into a website. Websites can easily save the seed and use it to steal all your bitcoins.

  0 secs
• Extended Keys

  tool-68696d620b4b4

  

  Extended Keys

  Derive a child extended key from a parent extended key.

  Generate Random

  From Seed

  Seed

  0 bytes

  If you enter a seed, the parent extended key below will be the master extended key.

  The master extended private key is created by putting the seed through HMAC-SHA512.

  Parent Extended Key

  Type

  Extended Private Key Extended Public Key

  Private Key

  0 bytes Chain Code

  0 bytes

  Index

  The index number of this child from its parent

  0d

  +1

  Type

  Normal (0 to 2147483647) Hardened (2147483648 to 4294967295)

  Child Extended Key

  Private Key

  0 bytes Public Key

  0 bytes Chain Code

  0 bytes

  • An extended private key is the private key and chain code.
  • An extended public key is the public key and chain code.

  Never use a private key generated by a website, or enter your private key into a website. Websites can easily save the private key and use it to steal your bitcoins.

  0 secs
• Derivation Paths

  tool-68696d620b645

  

  Derivation Paths

  Derive multiple private keys and addresses from a mnemonic sentence or seed using a specified derivation path.

  Generate Random

  Mnemonic Sentence + Passphrase

  Mnemonic Sentence

  0 words Passphrase (optional) extra word

  Seed

  0 bytes Derivation Path

  Starting with m/, enter a full derivation path to a specific child key. For example, derivation paths are often shortened to m/44'/0'/0', but that assumes you want to see the first key in the receiving section, which is m/44'/0'/0'/0/0. In other words, you may want to add an /0/0 to the base path you get from a wallet to retrieve the addresses you expect.

  Type BIP 32 BIP 44 BIP 49 BIP 84 BIP 86 Custom

  m / purpose' / coin type' / account' / receiving or change / index

  Keys and Addresses

  Settings

  Path Extended Private Key Private Key WIF Public Key Address

  5 10 20 50 100 Rows

  Never enter your seed into a website, or use a seed generated by a website. Websites can easily save the seed and use it to steal all your bitcoins.

  0 secs
• Address (Extended Key)

  tool-68696d620b6cf

  

  Address (Extended Key)

  Encode an extended key to an address.

  Generate Random Example

  Extended Key Data

  Type

  Legacy (BIP 44)

  Extended Private Key (xprv) Extended Public Key (xpub)

  Note: 1addresses (P2PKH)

  Segwit (BIP 49)

  Extended Private Key (yprv) Extended Public Key (ypub)

  Note: 3addresses (P2SH-P2WPKH)

  Segwit (BIP 84)

  Extended Private Key (zprv) Extended Public Key (zpub)

  Note: bc1addresses (P2WPKH)

  Depth

  How many derivations deep from the master key (0 if master key)

  0d

  +1

  Fingerprint

  The first 4 bytes of the HASH160 of the parent's public key (00000000 if master key)

  Index

  The index number of this key from its parent (0 if master key)

  0d

  +1

  Chain Code

  The last 32 bytes from the HMAC-SHA512 of the parent key (key+index, chain code) or (seed, passphrase)

  0 bytes Key

  Raw private key (32 bytes) or public key (33 bytes)

  0 bytes

  Serialized (Hex) 0 bytes

  Checksum

  0 bytes

  Address

  Base58 encoding of the serialized extended key and checksum

  0 characters

  Never use a private key generated by a website, or enter your private key into a website. Websites can easily save the private key and use it to steal your bitcoins.

  0 secs

Hash Functions

The hash functions used in Bitcoin.

• HASH256

  tool-68696d620b94e

  

  HASH256

  Double SHA-256. Used for hashing block headers, transaction data, and mostly anything that needs to be hashed in Bitcoin.

  Random Transaction Data Random Block Header

  Data (Hex) 0 bytes

  SHA-256

  SHA-256

  HASH256

  SHA-256(SHA-256(data))

  0 bytes

  0 secs
• HASH160

  tool-68696d620b96e

  

  HASH160

  SHA-256 + RIPEMD-160. Used for shortening a public key or script before converting to an address.

  Data (Hex)

  A public key or script for example

  0 bytes

  SHA-256

  RIPEMD-160

  HASH160

  RIPEMD-160(SHA-256(data))

  0 bytes

  0 secs
• SHA-256

  tool-68696d620b9d8

  

  SHA-256

  Single SHA-256. Hash bytes of data using the SHA-256 hash function.

  Data (Hex) 0 bytes

  SHA-256

  SHA-256(data) 0 bytes

  0 secs
• RIPEMD-160

  tool-68696d620b9df

  

  RIPEMD-160

  RIPEMD-160. Hash bytes of data using the RIPEMD-160 hash function.

  Data (Hex) 0 bytes

  RIPEMD-160

  RIPEMD-160(data) 0 bytes

  0 secs
• SHA-256 (Text)

  tool-68696d620b9e6

  

  SHA-256 (Text)

  Hash a string of text using the SHA-256 hash function.

  Text

  Enter any string of characters

  0 characters

  SHA-256

  SHA-256(text) 0 bytes

  0 secs

  This is just a quick example of the SHA-256 hash function. It hashes text (ASCII characters) instead of hexadecimal bytes. Use SHA-256 and HASH256 instead for hashing actual raw data in Bitcoin using SHA-256.

• HMAC-SHA512

  tool-68696d620bac4

  

  HMAC-SHA512

  Used when deriving extended keys.

  Random Example

  Data (Hex)

  seed or (private/public key + 4-byte index)

  0 bytes

  Key (Hex)

  "Bitcoin seed" or chain code

  0 bytes

  "Bitcoin seed" (ASCII)

  HMAC-SHA512

  Result

  HMAC-SHA512(data, key)

  0 bytes

  0 secs
• PBKDF2

  tool-68696d620bc1b

  

  PBKDF2

  Create a seed for a HD Wallet from a mnemonic sentence (and optional passphrase).

  Random Example

  Password (String)

  mnemonic sentence

  Salt (String)

  passphrase

  Reset (salt must start with prefix "mnemonic")

  

  PBKDF2

  • iterations: 2048
  • algorithm: HMAC-SHA512
  • length: 64 bytes

  Result

  PBKDF2(password, salt, iterations, algorithm, length)

  0 bytes

  Never enter your mnemonic sentence into a website, or use a mnemonic sentence generated by a website. Websites can easily save the seed and use it to steal all your bitcoins.

  0 secs
• Tagged Hash

  tool-68696d620bcd0

  

  Tagged Hash

  Create a hash of data with a tag prefix.
  Used in Schnorr sign, Schnorr verify, and Taproot.

  Random Example

  String

  BIP0340/aux BIP0340/nonce BIP0340/challenge

  TapLeaf TapBranch TapTweak TapSighash

  Data (Hex) 0 bytes

  Result

  SHA256(SHA256(string) || SHA256(string) || data)

  0 bytes

  0 secs

Cryptography

Tools for working with elliptic curve mathematics and signatures.

• ECDSA Sign

  tool-68696d620bd56

  

  ECDSA Sign

  Sign the hash of a message using a private key.

  Random Example

  Message Hash (z)

  This is typically the hash of some transaction data (that has been prepared for signing)

  0x

  0 bytes Nonce (k)

  0x

  Random

  Private Key (d)

  0x

  Random

  0 bytes

  Signature

  R:

  0d

  S:

  0d

  High:

  Low:  

  Never enter your private key into a website, or use a private key generated by a website. Websites can easily save the private key and use it to steal your bitcoins.

  0 secs
• ECDSA Verify

  tool-68696d620bdd7

  

  ECDSA Verify

  Verify a signature using the hash of a message and a public key.

  Random Example

  Message Hash (z)

  0x

  0 bytes

  Signature

  R:

  0d

  S:

  0d

  Public Key (Q)

  0x

  0 bytes

  Signature Verification

  x:

  0d

  y:

  0d

  0 secs
• DER Signature

  tool-68696d620bde1

  

  DER Signature

  Convert between a raw ECDSA signature and a DER-encoded signature.

  Random Example

  Signature

  R:

  0d

  S:

  0d

  DER Encoded Signature 0 bytes

  0 secs
• Schnorr Sign

  tool-68696d620be26

  

  Schnorr Sign

  Sign a message using a private key.

  Random Example

  Private Key (d')

  0x

  Random

  0 bytes Auxiliary Bytes (aux_rand)

  0x

  +1 Random

  0 bytes Message (m)

  0x

  0 bytes

  ---

  Details

  Public Key (P) = d'G

  x:

  0x

  y:

  0x

  Private Key (d) = (n - d') if P[y] is odd

  0x

  Private Nonce

  aux_rand_hash = hash_BIP0340/aux(aux_rand)

  0x

  t = d XOR aux_rand_hash

  0x

  k' = int(hash_{BIP0340/nonce}(t || P[x] || m)) % n

  0x

  Public Nonce (R) = k'G

  x:

  0x

  y:

  0x

  k = (n - k') if R[y] is odd

  0x

  Challenge (e) = int(hash_{BIP0340/challenge}(R[x] || P[x] || m)) % n

  0x

  Signature

  r = R[x]

  0d

  s = (k + ed) % n

  0d

  Signature

  0x

  0 bytes

  Never enter your private key into a website, or use a private key generated by a website. Websites can easily save the private key and use it to steal your bitcoins.

  0 secs
• Schnorr Verify

  tool-68696d620bea7

  

  Schnorr Verify

  Verify a signature for a public key and message.

  Random Example

  Public Key (P[x])

  0x

  Random

  0 bytes Message (m)

  0x

  Random

  0 bytes Signature (r, s)

  0x

  0 bytes

  ---

  Details

  Public Key (P)

  x:

  0d

  y:

  0d

  Signature

  r:

  0d

  s:

  0d

  Point 1 = sG

  x:

  0d

  y:

  0d

  Challenge (e) = int(hash_{BIP0340/challenge}(r || P[x] || m)) % n

  0d

  (n - e)

  0d

  Point 2 = (n-e)P

  x:

  0d

  y:

  0d

  R = sG + (n-e)P

  x:

  0d

  y:

  0d

  Verify (r = R[x])

  r:   

  0d

  R[x]:

  0d

  0 secs
• Modular Inverse

  tool-68696d620bf41

  

  Modular Inverse

  Find the inverse of a number with a specific modulus.

  Simple Example

  Number

  0d

  Inverse

  0d

  Modulus

  0d

  n p

  0 secs
• EC Double

  tool-68696d620bf49

  

  EC Double

  Double a point on the secp256k1 elliptic curve.

  Generator Point Random Point

  Point 1

  x:

  0d

  y:

  0d

  Point 1 + Point 1

  x:

  0d

  y:

  0d

  0 secs
• EC Add

  tool-68696d620bfa1

  

  EC Add

  Add two points on the secp256k1 elliptic curve.

  Random Points

  Point 1

  x:

  0d

  y:

  0d

  Point 2

  x:

  0d

  y:

  0d

  Point 1 + Point 2

  x:

  0d

  y:

  0d

  0 secs
• EC Multiply

  tool-68696d620c00a

  

  EC Multiply

  Multiply a point on the secp256k1 elliptic curve.

  Generator Point Random Point

  Point 1

  x:

  0d

  y:

  0d

  Multiplier

  0d

  +1 Random

  Point 1 x Multiplier

  x:

  0d

  y:

  0d

  Steps

   

  0 secs

General

Tools for decoding and converting bytes found in raw transactions and blocks.

• Reverse Bytes

  tool-68696d620c014

  

  Reverse Bytes

  Bytes 0 bytes Reversed 0 bytes Show Individual Bytes

  0 secs
• Little Endian

  tool-68696d620c061

  

  Little Endian

  Convert numbers to big-endian and little-endian byte orders.

  +1 Decimal

  0d

  Hex Bytes (Big Endian)

  0x

  0 bytes Hex Bytes (Little Endian)

  0x

  0 bytes

  Field Size

  Any 2 Bytes 4 Bytes 8 Bytes 12 Bytes 16 Bytes 32 Bytes

  0 secs
• Base Converter

  tool-68696d620c0c9

  

  Base Converter

  Convert a number between different bases (binary, decimal, hexadecimal).

  Base 2 (Binary)

  0b

  0 digits Base 10 (Decimal)

  0d

  0 digits Base 16 (Hexadecimal)

  0x

  0 digits +1

  0 secs
• Compact Size

  tool-68696d620c0d4

  

  Compact Size

  Integer

  0d

  Compact Size 0 bytes

  Prefix

  The first byte indicates which bytes encode the integer:

  <=FC – This byte (0 - 252)   FD – The next two bytes (253 - 65535)   FE – The next four bytes (65536 - 4294967295)   FF – The next eight bytes (4294967296 - 18446744073709551615)

  Note: Bytes encoding the integer are in little endian.

  0 secs
• ASCII

  tool-68696d620c137

  

  ASCII

  Convert between bytes (in hexadecimal) and ASCII characters.

  Example Hex

  0 bytes

  Bytes

   

  ASCII

  0 characters

  • The hex bytes between 0x20 and 0x7f contain the printable characters.
  • Anything 0x1f or below is a control character (will not display, or will display a weird character).
  • Anything 0x80 or above will show nothing.

  See the ISO 646 encoding standard for details.

  0 secs
• Unix Time

  tool-68696d620c140

  

  Unix Time

  Convert the number of seconds since 1 Jan 1970, 00:00:00 to a date.

  Unix Time

  0d

  Now

  Date

  0 secs
• Unit Converter

  tool-68696d620c1d6

  

  Unit Converter

  Convert between common units of bitcoin.

  BTC

  whole bitcoin

  mBTC

  one-thousandth of a bitcoin

  uBTC

  one-millionth of a bitcoin

  Sats

  one-hundred-millionth of a bitcoin

  0 secs

Other

Basic tools for understanding bits and bytes. Mostly educational and not particularly useful.

• Bytes

  tool-68696d620c1e0

  

  Bytes

  Bytes 1 2 3 4 5 6 7 8 12 16 32

  Binary

  Byte 2

  0 0 0 0 0 0 0 0

  Byte 1

  0 0 0 0 0 0 0 0

  Hexadecimal

  Byte 2

  0 0

  Byte 1

  0 0

  Binary 0b0000000000000000

  Decimal 0d0

  Hexadecimal 0x0000
• Byte Ascii

  tool-68696d620c262

  

  Byte (ASCII)

  Convert between a byte and an ASCII character.

  Binary

  Byte

  0 0 0 0 0 0 0 0

  Hexadecimal

  0 0

  Decimal 0

  Character

  ASCII Table

  The following characters are from Code Page 437, which is a popular 8-bit ASCII character set.

  Basically, all ASCII character sets contain the same standard letters and numbers (between 0x20 and 0x7f). These are historically known as the printable characters.

  Code Page 437 extended this with an additional 128 characters (between 0x80 and 0xff) to include international, box drawing, and mathematical characters too. This additional set of characters is commonly referred to as "extended ASCII".

  Code Page 437 also replaced the obsolete control characters (between 0x01 and 0x1f) from the original ASCII standard (e.g. ISO 646) with decorative characters instead.

  There is no specific ASCII character set used in Bitcoin, but this is a popular one, and it's good for demonstrating how bytes can be assigned to characters.

  Standard ASCII

  Decorative Characters

  Binary	Hexadecimal	Decimal	Character
  00000000	00	0
  00000001	01	1	☺
  00000010	02	2	☻
  00000011	03	3	♥
  00000100	04	4	♦
  00000101	05	5	♣
  00000110	06	6	♠
  00000111	07	7	•
  00001000	08	8	◘
  00001001	09	9	○
  00001010	0a	10	◙
  00001011	0b	11	♂
  00001100	0c	12	♀
  00001101	0d	13	♪
  00001110	0e	14	♫
  00001111	0f	15	☼
  00010000	10	16	►
  00010001	11	17	◄
  00010010	12	18	↕
  00010011	13	19	‼
  00010100	14	20	¶
  00010101	15	21	§
  00010110	16	22	▬
  00010111	17	23	↨
  00011000	18	24	↑
  00011001	19	25	↓
  00011010	1a	26	→
  00011011	1b	27	←
  00011100	1c	28	∟
  00011101	1d	29	↔
  00011110	1e	30	▲
  00011111	1f	31	▼

  Printable Characters

  Binary	Hexadecimal	Decimal	Character
  00100000	20	32	(space)
  00100001	21	33	!
  00100010	22	34	"
  00100011	23	35	#
  00100100	24	36	$
  00100101	25	37	%
  00100110	26	38	&
  00100111	27	39	'
  00101000	28	40	(
  00101001	29	41	)
  00101010	2a	42	*
  00101011	2b	43	+
  00101100	2c	44	,
  00101101	2d	45	-
  00101110	2e	46	.
  00101111	2f	47	/
  00110000	30	48	0
  00110001	31	49	1
  00110010	32	50	2
  00110011	33	51	3
  00110100	34	52	4
  00110101	35	53	5
  00110110	36	54	6
  00110111	37	55	7
  00111000	38	56	8
  00111001	39	57	9
  00111010	3a	58	:
  00111011	3b	59	;
  00111100	3c	60	<
  00111101	3d	61	=
  00111110	3e	62	>
  00111111	3f	63	?
  01000000	40	64	@
  01000001	41	65	A
  01000010	42	66	B
  01000011	43	67	C
  01000100	44	68	D
  01000101	45	69	E
  01000110	46	70	F
  01000111	47	71	G
  01001000	48	72	H
  01001001	49	73	I
  01001010	4a	74	J
  01001011	4b	75	K
  01001100	4c	76	L
  01001101	4d	77	M
  01001110	4e	78	N
  01001111	4f	79	O
  01010000	50	80	P
  01010001	51	81	Q
  01010010	52	82	R
  01010011	53	83	S
  01010100	54	84	T
  01010101	55	85	U
  01010110	56	86	V
  01010111	57	87	W
  01011000	58	88	X
  01011001	59	89	Y
  01011010	5a	90	Z
  01011011	5b	91	[
  01011100	5c	92	\
  01011101	5d	93	]
  01011110	5e	94	^
  01011111	5f	95	_
  01100000	60	96	`
  01100001	61	97	a
  01100010	62	98	b
  01100011	63	99	c
  01100100	64	100	d
  01100101	65	101	e
  01100110	66	102	f
  01100111	67	103	g
  01101000	68	104	h
  01101001	69	105	i
  01101010	6a	106	j
  01101011	6b	107	k
  01101100	6c	108	l
  01101101	6d	109	m
  01101110	6e	110	n
  01101111	6f	111	o
  01110000	70	112	p
  01110001	71	113	q
  01110010	72	114	r
  01110011	73	115	s
  01110100	74	116	t
  01110101	75	117	u
  01110110	76	118	v
  01110111	77	119	w
  01111000	78	120	x
  01111001	79	121	y
  01111010	7a	122	z
  01111011	7b	123	{
  01111100	7c	124	|
  01111101	7d	125	}
  01111110	7e	126	~
  01111111	7f	127	⌂

  Extended ASCII

  International Characters

  Binary	Hexadecimal	Decimal	Character
  10000000	80	128	Ç
  10000001	81	129	ü
  10000010	82	130	é
  10000011	83	131	â
  10000100	84	132	ä
  10000101	85	133	à
  10000110	86	134	å
  10000111	87	135	ç
  10001000	88	136	ê
  10001001	89	137	ë
  10001010	8a	138	è
  10001011	8b	139	ï
  10001100	8c	140	î
  10001101	8d	141	ì
  10001110	8e	142	Ä
  10001111	8f	143	Å
  10010000	90	144	É
  10010001	91	145	æ
  10010010	92	146	Æ
  10010011	93	147	ô
  10010100	94	148	ö
  10010101	95	149	ò
  10010110	96	150	û
  10010111	97	151	ù
  10011000	98	152	ÿ
  10011001	99	153	Ö
  10011010	9a	154	Ü
  10011011	9b	155	¢
  10011100	9c	156	£
  10011101	9d	157	¥
  10011110	9e	158	₧
  10011111	9f	159	ƒ
  10100000	a0	160	á
  10100001	a1	161	í
  10100010	a2	162	ó
  10100011	a3	163	ú
  10100100	a4	164	ñ
  10100101	a5	165	Ñ
  10100110	a6	166	ª
  10100111	a7	167	º
  10101000	a8	168	¿
  10101001	a9	169	⌐
  10101010	aa	170	¬
  10101011	ab	171	½
  10101100	ac	172	¼
  10101101	ad	173	¡
  10101110	ae	174	«
  10101111	af	175	»

  Box Drawing Characters

  Binary	Hexadecimal	Decimal	Character
  10110000	b0	176	░
  10110001	b1	177	▒
  10110010	b2	178	▓
  10110011	b3	179	│
  10110100	b4	180	┤
  10110101	b5	181	╡
  10110110	b6	182	╢
  10110111	b7	183	╖
  10111000	b8	184	╕
  10111001	b9	185	╣
  10111010	ba	186	║
  10111011	bb	187	╗
  10111100	bc	188	╝
  10111101	bd	189	╜
  10111110	be	190	╛
  10111111	bf	191	┐
  11000000	c0	192	└
  11000001	c1	193	┴
  11000010	c2	194	┬
  11000011	c3	195	├
  11000100	c4	196	─
  11000101	c5	197	┼
  11000110	c6	198	╞
  11000111	c7	199	╟
  11001000	c8	200	╚
  11001001	c9	201	╔
  11001010	ca	202	╩
  11001011	cb	203	╦
  11001100	cc	204	╠
  11001101	cd	205	═
  11001110	ce	206	╬
  11001111	cf	207	╧
  11010000	d0	208	╨
  11010001	d1	209	╤
  11010010	d2	210	╥
  11010011	d3	211	╙
  11010100	d4	212	╘
  11010101	d5	213	╒
  11010110	d6	214	╓
  11010111	d7	215	╫
  11011000	d8	216	╪
  11011001	d9	217	┘
  11011010	da	218	┌
  11011011	db	219	█
  11011100	dc	220	▄
  11011101	dd	221	▌
  11011110	de	222	▐
  11011111	df	223	▀

  Mathematical Symbols

  Binary	Hexadecimal	Decimal	Character
  11100000	e0	224	α
  11100001	e1	225	ß
  11100010	e2	226	Γ
  11100011	e3	227	π
  11100100	e4	228	Σ
  11100101	e5	229	σ
  11100110	e6	230	µ
  11100111	e7	231	τ
  11101000	e8	232	Φ
  11101001	e9	233	Θ
  11101010	ea	234	Ω
  11101011	eb	235	δ
  11101100	ec	236	∞
  11101101	ed	237	φ
  11101110	ee	238	ε
  11101111	ef	239	∩
  11110000	f0	240	≡
  11110001	f1	241	±
  11110010	f2	242	≥
  11110011	f3	243	≤
  11110100	f4	244	⌠
  11110101	f5	245	⌡
  11110110	f6	246	÷
  11110111	f7	247	≈
  11111000	f8	248	°
  11111001	f9	249	∙
  11111010	fa	250	·
  11111011	fb	251	√
  11111100	fc	252	ⁿ
  11111101	fd	253	²
  11111110	fe	254	■
  11111111	ff	255	(non-breaking space)

• Byte Integer

  tool-68696d620c5d0

  

  Byte (Integer)

  Binary

  Byte

  0 0 0 0 0 0 0 0

  Hexadecimal

  0 0

  Integer 0
• Byte Hexadecimal

  tool-68696d620c5da

  

  Byte (Hexadecimal)

  Binary

  Byte

  0 0 0 0 0 0 0 0

  Hexadecimal

  0 0

  Tip: The lowest value bit is on the right →

  Tip: Half of a byte is called a "nibble". But that's not important to know for Bitcoin.

• Bit Field

  tool-68696d620c64f

  

  Bit Field

  Bit Field

  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

  Binary 0b00000000000000000000000000000000

  Decimal 0d0

  Hexadecimal 0x00000000
• Byte

  tool-68696d620c6e5

  

  Byte

  Byte

  0 0 0 0 0 0 0 0
• Bit

  tool-68696d620c6ee

  

  Bit

  0

  Note: Just click the bit to turn it "on" and "off".

About

I built these tools using PHP and HTMX.

Every time you enter some data into the tool, the data gets sent to my server, gets processed using a bitcoin library I've written in PHP, and reloads the form on the page with the results.

So everything you enter into these tools gets sent to my server for processing. As such, you should avoid entering any sensitive data like your own personal private keys into these tools (as it goes for any web-based bitcoin tool). I do not save any data you enter into these tools, but you only have my word.

As you can imagine, these bitcoin web tools are designed for educational purposes. I've coded them to the best of my ability, and I use them regularly for working with raw bitcoin data myself, but I wouldn't recommend using them for critically important bitcoin programming work.

In other words, have fun, but don't blame me if something goes wrong.

If you find any problems with these tools or have any suggestions for improvement, please send me an email at gregDELETEME@learnme­abitDELETEMEcoin.com.

If you're unlucky the tool you're using may process and return some data at the exact moment you've typed something new in. So if you want to be 100% confident about the results of your input, just hit Enter again.

Why PHP?

Because it's the language I know best.

These tools would run faster if I coded them in Javascript, but all of my own personal bitcoin library code is written in PHP, so I thought it would more reliable to use my PHP code in conjunction with HTMX to create these interactive online tools for Bitcoin.

So you may not get the instant-response (or client-side processing) that you would get from a Javascript-based web tool, but using PHP allows me to process the data confidently and give you the most reliable results I can.

Or in other words, the reason they're so slow is because I didn't want to rewrite all my PHP code in God forbidden Javascript.

Enjoy.

Other Tools

Here are some other awesome online bitcoin tools that are better than mine:

• BIP39 Mnemonic Code Converter (iancoleman.io)
• Graphical Address Generator (royalforkblog)