Hash ToolsWorkboxHash ToolsWorkbox
Offline hash, HMAC, and file checksums in your browser.
Compute digests and verify files locally. Supports MD5, SHA family, SHA3, BLAKE, CRC, HMAC, and more — without uploading data.
Why this toolkit
Zero upload
Text, files, and keys stay in your browser. Hashing never hits a server API.
Many algorithms
MD / SHA / SHA3 / BLAKE / CRC / RIPEMD with shared output formats.
Streaming files
4MB chunked reads with progress and cancel — suitable for large packages.
HMAC & verify
Sign with HMAC, compare digests, and guess algorithm by length.
Utilities
FAQ
- Is my data uploaded?
- No. All hash and HMAC work runs locally in the browser. Preferences may be saved in localStorage under a site-specific prefix.
- Can I hash large files?
- Yes. Files are read in 4MB chunks with a progress bar and cancel support. Files over 10GB show a performance warning.
- Is salted MD5 safe for passwords?
- No. MD5/SHA/CRC are digests, not password KDFs. Prefer Argon2id / bcrypt / PBKDF2 for password storage (planned in a later release).
Registered tools: 1