In development. RVNT is pre-release — not yet security-audited. Source code, public builds, and the iOS / App Store release aren’t available yet. See the roadmap →

File Checksum

SHA-256 / 384 / 512 of any file, locally.

Runs entirely in your browser — nothing you enter is uploaded, logged, or tracked.

Drag in a file to compute its SHA-256/384/512 checksum locally — confirm a download matches the publisher’s hash, or spot a tampered file, without uploading a thing.

Frequently asked questions

Why verify a checksum?

A published SHA-256 lets you confirm a downloaded file is bit-for-bit identical to the original — proof it wasn’t corrupted in transit or swapped for a malicious version.

Is my file uploaded?

Never. The file is read directly in your browser with the FileReader and Web Crypto APIs and hashed on your device — so even large or sensitive files stay completely private.

Related tools

Password Generator Strong, random passwords — generated locally. Hash Generator SHA-1, SHA-256, SHA-384 & SHA-512. JWT Decoder Decode a JSON Web Token, locally.

Built by a privacy company

These tools never phone home — the same principle as RVNT itself: a post-quantum, end-to-end-encrypted, peer-to-peer messenger with no servers and no tracking.

Get RVNT All tools