Are files or HMAC keys uploaded?

No. Processing happens locally. Text, files, comparison values and HMAC keys are not persisted or placed in share links; only algorithm and display options are saved.

How large can a file be?

SHA and HMAC inputs are limited to 64 MiB because Web Crypto needs the whole input in memory. MD5 and CRC-32 process files incrementally without that cap. Browser and device resources still affect processing time.

ToolHub

Hash Generator

Hash text or files with MD5, CRC-32 or SHA. Generate HMAC, compare expected hashes and export results locally in your browser.

Stable

Online

Text, files and keys are processed locally in your browser. Only algorithm and display options are saved or shared.

Text to hash (UTF-8)

MD5 and SHA-1 are unsuitable for security purposes. CRC-32 detects accidental changes and is not a cryptographic hash.

SHA and HMAC require the whole input in memory and are limited to 64 MB. MD5 and CRC-32 read files in chunks without this limit.

Enter text or choose a file, select algorithms, then generate hashes. Empty text is supported.

Expected hash

Compare with a hex or Base64 hash. Hex comparison ignores case; Base64 comparison preserves case. Re-run after changing inputs.

Generate several hashes from UTF-8 text or exact file bytes. Choose SHA-1, SHA-256, SHA-384, SHA-512, MD5 or CRC-32 and display hex or Base64 results. HMAC supports SHA algorithms with text or hex keys. SHA and HMAC inputs are capped at 64 MiB because Web Crypto requires the whole input in memory. MD5 and CRC-32 stream files in chunks. Inputs and keys stay in the browser; share links contain options only. MD5 and SHA-1 are unsuitable for security purposes, and CRC-32 is not cryptographic.

Hash UTF-8 text or exact file bytes with six algorithms
Generate SHA-based HMAC with text or hexadecimal keys
Show hexadecimal or Base64 output with per-row copy
Compare expected hashes across selected algorithms
Stream MD5 and CRC-32 files with progress and cancellation
Export CSV, JSON or PDF and share options without inputs