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Hash Generator

Hash generator is a data tool that computes SHA-256, SHA-512, SHA-1, and MD5 hashes of text, and SHA-256, SHA-512, or SHA-1 checksums of files. It uses the browser's Web Crypto API for the SHA family, a bundled RFC 1321 implementation for MD5, and shows lowercase or uppercase hex as you type. The tool runs in your browser.

Input
SHA-256 Hash
Hash appears here…

ALGORITHM

DISPLAY

Output length

64 hex characters

Processed locally

All hash tools

Dedicated pages for each algorithm and use case.

SHA-256 Hash Generator
Generate a SHA-256 hash of any text as a 64-character hex string that updates as you type, using the Web Crypto API. Runs in your browser.
SHA-512 Hash Generator
Generate a SHA-512 hash of any text as a 128-character hex string that updates as you type, using the Web Crypto API. Runs in your browser.
SHA-1 Hash Generator
Generate a SHA-1 hash of any text as a 40-character hex string for legacy checksums and older systems. All processing runs in your browser.
MD5 Hash Generator
Generate an MD5 hash of any text as a 32-character hex string for checksums and legacy systems. All processing runs in your browser.
File Checksum
Verify file integrity with a checksum hash. Drop a file and check its SHA-256, SHA-512, or SHA-1 hash. All processing runs in your browser.
SHA-256 File Hash Without Uploading
Generate a SHA-256 hash of any file without uploading it. No account required. All hashing runs locally in your browser using the Web Crypto API.

How to generate a hash

  1. Choose SHA-256, SHA-512, SHA-1, or MD5.
  2. Type or paste the text you want to hash into the input area.
  3. The hash is computed instantly in your browser, with the built-in Web Crypto API for the SHA algorithms and a bundled JavaScript implementation for MD5.
  4. Click "Copy" to copy the hash string to your clipboard.

Common uses

  • Verifying the integrity of a downloaded file by comparing its hash against the published checksum
  • Generating a unique fingerprint for text content or data, switch to random UUID v4 values when you need collision-resistant unique IDs instead
  • Checking whether two pieces of data are identical without comparing them directly, switch to a side-by-side text comparison to see exactly what changed between two versions

Technical specification

  • Algorithm or formula: SHA-256, SHA-512, and SHA-1 are computed via the Web Crypto API. MD5 (RFC 1321) is computed in a compact in-browser JavaScript implementation because crypto.subtle does not expose MD5.
  • Browser API or library: crypto.subtle.digest for SHA family. Pure JavaScript for MD5. TextEncoder for UTF-8 byte conversion.
  • Input limits: Text bounded by browser memory. File mode caps inputs at 10 MB to avoid blocking the main thread.
  • Output: Lowercase or uppercase hex digest string, copyable to clipboard.
  • Known limitations: MD5 and SHA-1 are cryptographically broken for collision resistance; use SHA-256 or SHA-512 for security-sensitive work. HMAC and salted hashing variants are not in scope.

Frequently asked questions

Which hash algorithms does this tool generate?
Four: SHA-256, SHA-512, SHA-1, and MD5. Switch between them in the tool above, or open each algorithm's own page. SHA-256 is the standard choice for general-purpose integrity checks. SHA-1 and MD5 are included for legacy compatibility but are considered cryptographically weak and should be avoided for security.
Is my data sent to a server?
All hashing runs in your browser. SHA-256, SHA-512, and SHA-1 use the browser's built-in Web Crypto API. MD5 runs in a bundled JavaScript implementation. No data is sent to our servers.
Can hashes be reversed?
Hash functions are one-way: you cannot turn a hash back into the input. Common inputs can still be found with precomputed lookup tables, so store passwords with a slow, salted function such as bcrypt or Argon2.
Can I hash a file, not just text?
Yes. Use the File Checksum page to drop a file and generate its SHA-256, SHA-512, or SHA-1 hash, useful for integrity verification of downloads.

Related tools

Base64
Encode text or files to Base64, decode Base64, or convert images to data URIs.
UUID generator
Generate random UUID v4 values in bulk. Uses the browser's crypto API.
Password generator
Generate random, strong, or memorable passwords using your browser's crypto API.
Text diff
Compare two texts in word, side-by-side, or git-style views. The word and side-by-side views highlight changed words.

Reviewed and tested September 30, 2026.