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Hash & Checksum Studio

Compute MD5, SHA-1/256/512, and SHA3 digests for strings or files in the browser.

Crypto & Certs
Privacy: 100% Client-Side. Your data never leaves this browser tab. Processing uses Web APIs and client-side libraries only.

Compute checksums for strings or files in the browser. SHA-1/256/512 use WebCrypto; MD5 and SHA3 use audited pure-JS implementations.

via WebCrypto SubtleCrypto

What are cryptographic hashes?

Hash functions map arbitrary data to fixed-size digests for integrity checks, content addressing, and fingerprinting secrets without reversible encryption.

This studio computes digests locally for pasted text or uploaded files so checksums never transit stbox servers.

How to use this tool

  1. Pick an algorithm, paste text or choose a file, then compute the digest.
  2. Copy the hex output for comparison with upstream checksums.

Frequently asked questions

Which algorithms use WebCrypto?

SHA-1, SHA-256, and SHA-512 use SubtleCrypto. MD5 and SHA3 use @noble/hashes in-browser.