SHA-256 hash generator
See the SHA-256 hash of any text, the hash function behind Bitcoin, and watch how changing one character changes the whole hash. Free, no sign-up, worked out in your browser.
- 1Type in your own numbers
- 2The tool works it out
- 3See the answer clearly
Text is hashed exactly as typed, including spaces and capitals, using UTF-8. Never paste a seed phrase, private key or password into any website, this one included.
What a hash is
A hash function turns any amount of data into a short, fixed-length fingerprint. SHA-256 always gives 256 bits, shown as 64 hexadecimal characters. The same input always gives the same hash, but you can't work backwards from a hash to the input, and changing a single character changes the hash completely.
How blockchains use it
Bitcoin uses SHA-256 to link each block to the one before it, so changing an old transaction would change every hash after it. Miners repeatedly hash block headers looking for a hash below a target, which is what proof of work means. Hashes also help build Bitcoin addresses and transaction IDs.
See it happen
Your own money app- 1Name it and pick your colours
- 2Choose what it does
- 3Launch when you are ready
Try it
Name your platform and watch it come to life
Type a name, tap a colour and pick what it does. The phone changes as you go.
Colour
What it does
Design and preview your whole platform free, then launch when you are ready.
Run your own crypto app
SendPay platforms let customers buy, sell and hold crypto, held with regulated partners, alongside GBP, EUR and USD accounts, powered by licensed partners. SendPay doesn't offer trading tools, DeFi or lending.