Hash Generator
Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512, CRC-32 and CRC-64 of text or a file at once. Results update as you type, and nothing leaves your browser. Use it to verify a downloaded file against a published checksum or to get a quick fingerprint of some data.
What is a hash?
A hash function turns data of any size into a short, fixed-length value called a digest or checksum. The same input always gives the same hash, and even a one-byte change produces a completely different result, which makes hashes useful for checking that a file has not been corrupted or altered. This tool calculates seven common hashes and checksums for the text or file you provide, all at the same time.
How to use
- Type or paste text into the editor, or drop a file onto it.
- All hash values are calculated automatically and update whenever the input changes.
- Click the copy icon next to a value to copy it.
To verify a download, drop the file and compare the value with the checksum published by the provider (for example the SHA-256 listed on a release page).
Supported algorithms
| Algorithm | Length | Notes |
|---|---|---|
| CRC-32 | 8 hex digits | Error-detection checksum used by ZIP, GZIP and PNG; not for security |
| CRC-64 (XZ) | 16 hex digits | The CRC-64/XZ variant used by the xz format; not for security |
| MD5 | 32 hex digits | Still common for file checksums, but broken for security purposes |
| SHA-1 | 40 hex digits | Used by Git; collisions are practical, avoid for new security uses |
| SHA-256 | 64 hex digits | The usual choice for checksums and signatures today |
| SHA-384 | 96 hex digits | SHA-2 family, truncated SHA-512 |
| SHA-512 | 128 hex digits | SHA-2 family, longest output |
Example
For the text hello (UTF-8, no trailing newline):
- CRC-32:
3610a686 - MD5:
5d41402abc4b2a76b9719d911017c592 - SHA-1:
aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d - SHA-256:
2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824
Features
- Seven algorithms calculated in one go
- Text input (hashed as UTF-8) or any file, including binary files
- Automatic recalculation as you type
- Lowercase hexadecimal output with a copy button for each value
- SHA hashes use the browser's built-in Web Crypto API
FAQ
Is my file uploaded?
No. Hashes are calculated in your browser, so you can safely check private files. The file is read into memory, so very large files (several GB) may be slow or fail depending on your device.
Why is my hash different from the one I expected?
The most common cause is invisible differences in the input, such as a trailing newline, Windows line endings (CRLF vs LF) or a different text encoding. Hashing the file itself instead of pasted text avoids most of these problems.
Can I use these hashes to store passwords?
No. MD5 and SHA hashes are designed to be fast, which makes password guessing fast too. Use a dedicated password hashing algorithm such as bcrypt, scrypt or Argon2.
Can a hash be reversed to get the original text?
No. Hashes are one-way. Short or common inputs can still be found by guessing, which is why MD5 "decrypt" sites exist.