Hash Generator

Generate SHA, MD5, and CRC32 hashes from text or files, plus HMAC signatures - all locally in your browser.

One-click hashing

Input Text0 characters
SHA-1160 bit
Hash will appear here...
SHA-256256 bit
Hash will appear here...
SHA-384384 bit
Hash will appear here...
SHA-512512 bit
Hash will appear here...
MD5128 bitchecksum only - not collision-resistant
Hash will appear here...
CRC3232 bitchecksum only - not collision-resistant
Hash will appear here...

About This Tool

Text SHA hashes and HMAC signatures use the Web Crypto API; MD5, CRC32, and file hashing use WebAssembly (hash-wasm). Files are streamed in ~4 MB chunks, so even multi-gigabyte files hash without loading into memory. All processing happens locally in your browser - your data is never sent to any server.

  • • SHA-1: Legacy, not recommended for security
  • • SHA-256: Most commonly used, good for general purposes
  • • SHA-384: Stronger than SHA-256, less common
  • • SHA-512: Strongest, best for high-security applications
  • • MD5 / CRC32: Checksums for integrity checks only - both are broken for security use
  • • HMAC: Keyed signature - proves a message came from someone holding the secret
About

About the Hash Generator

The Hash Generator turns any text you type or paste into a cryptographic hash: a fixed-length fingerprint produced by algorithms like MD5, SHA-1, and SHA-256. Reach for it when you need to verify file or string integrity, compare a value against a known checksum, generate a non-reversible identifier, or quickly check what a given hash should look like. Everything runs locally in your browser, so your input never leaves your device.

How to use the Hash Generator

  1. 1Type or paste the text you want to hash into the input field.
  2. 2Choose the hash algorithm you need, such as MD5, SHA-1, or SHA-256.
  3. 3Read the generated hash from the output area as it updates.
  4. 4Copy the resulting hash to your clipboard with one click.
  5. 5Paste it where you need it, or compare it against an expected checksum.

Common use cases

  • Verifying a downloaded file matches the publisher's published checksum
  • Generating a SHA-256 fingerprint to compare two pieces of text for changes
  • Creating stable, non-reversible identifiers from a string for caching or deduplication
  • Producing test fixtures or expected hash values for unit tests
  • Checking that data was not corrupted or altered in transit

Frequently asked questions

What is a hash and what does this tool do?

A hash is a fixed-length string derived from input data by a one-way function: the same input always produces the same hash, but you cannot reverse the hash back into the original. This tool computes that hash from the text you provide using algorithms such as MD5, SHA-1, and SHA-256.

Is my data private and safe?

Yes. The tool runs entirely in your browser. Your input is never uploaded, sent to a server, stored, or tracked, and the hashing happens locally on your own device.

What is the difference between MD5, SHA-1, and SHA-256?

They differ in output length and security. MD5 (128-bit) and SHA-1 (160-bit) are fast but cryptographically broken, so use them only for non-security checksums. SHA-256, part of the SHA-2 family, produces a 256-bit hash and is the recommended choice for integrity and security-sensitive work.

Can I get the original text back from a hash?

No. Hashing is one-way by design, so there is no decrypt or reverse function. The only way to find a matching input is to hash candidate values and compare, which is exactly why weak algorithms are unsafe for passwords.

Is the Hash Generator free to use?

Yes, it is completely free with no sign-up required. Because all processing happens client-side in your browser, you can use it as often as you like.