Hash Generator
Generate cryptographic hashes for text or files. MD5, SHA-1, SHA-256, SHA-512.
Runs entirely in your browser — files never uploaded
How to use Hash Generator
- 1. Pick a source. Hash text you paste in, or upload a file (up to 100 MB).
- 2. Click generate. All four hashes (MD5, SHA-1, SHA-256, SHA-512) compute in one go.
- 3. Copy any digest. Click Copy next to the algorithm you need. Output is hex-encoded, lowercase.
FAQ
Which hash should I use?
For checksums or download verification, SHA-256 is the modern standard. MD5 and SHA-1 are still useful for non-security checks (matching files, dedup) but are considered broken for cryptographic use.
Are my files uploaded?
No. All hashing runs in your browser using the Web Crypto API (and SparkMD5 for MD5). Nothing is sent to any server.
How fast is this on big files?
MD5 streams in 2 MB chunks so even multi-GB files would work without exhausting memory (subject to browser limits). SHA-* needs to buffer the whole file due to Web Crypto's API, so we cap at 100 MB.
Why are my hash values different from another tool?
Check the encoding. We hash the raw bytes of files, and UTF-8 encoded bytes for text. Other tools that hash UTF-16 or add a BOM will produce different digests. The hex output is always lowercase.
Can I use this for password hashing?
No — never use plain MD5/SHA-* for passwords. Use bcrypt, scrypt, or Argon2 instead. These hashes are designed to be fast, which is bad for password security.