Free security tools that never see your data
Generate passwords, secrets and tokens, check strength, and hash files. These are the tools where "it runs in your browser" is not a marketing line — it is the entire security model.
The 8 tools in this set
Password Generator
Strong random passwords with a live strength meter.
Password Strength CheckerScore passwords before you use them.
Secret Key GeneratorStrong secret keys for signing.
Random Token GeneratorCryptographic tokens and API keys.
SHA-256 File HashHash any file with SHA-256.
Hash GeneratorHash text with MD5 and every SHA.
JWT DecoderDecode JWT tokens without a server.
Checksum GeneratorCRC32 checksums for your files.
A sensible order to work in
- Generate locally, never on a website form — A password typed into a third-party site has already travelled.
- Use length over complexity — Four random words beat eight mixed characters and are easier to type.
- Verify files by hash — A checksum is the only reliable way to know a download was not altered.
Categories this set draws from
Privacy & security tools — FAQ
Is my password sent anywhere?
No. Generation and strength checking both happen in your browser, with no network request.
How are the random values produced?
From the browser cryptographic random source, which is far stronger than a basic random function.
Can I hash a large file?
Yes, the file is read locally in chunks — nothing is uploaded.