New
Password Generator
Generate strong random passwords with the length and characters you choose, plus a strength estimate.
How it works
SHA Hash Generator
Hash text or a file with SHA-1, SHA-256, SHA-384 and SHA-512 at once, add a key to get an HMAC, and paste an expected checksum to verify a download.
- 01
Type or paste text, or switch to File and drop in any file.
- 02
Add a secret key if you need an HMAC, such as to check a webhook signature. Pick hex or Base64 output.
- 03
Copy a hash, or paste an expected checksum to see whether it matches.
Good to know
- Text is hashed as UTF-8, with no trailing newline. The same text from a terminal's echo adds a newline and gives a different hash; use echo -n or printf.
- Files are read into memory, so very large files (several GB) may be too much for a phone.
- MD5 isn't offered. It's broken for security uses and browsers' Web Crypto API doesn't include it.
FAQ
Frequently asked questions
Which algorithm should I use?
SHA-256 for checksums and signatures. SHA-1 is only for checking old systems that still publish it; it's no longer collision-resistant.
Can a hash be reversed?
No. A hash is one-way, but short or common inputs like passwords can be found by guessing, which is why password storage uses slow hashes like bcrypt or Argon2 instead.
Is my file uploaded?
No. Hashing runs in this tab with your browser's Web Crypto API.
Missing something?
Tell us the tool you wish existed.
Describe the job and the file types involved. The most requested tools get built first.