The native Mac app for checksums — of text, files, and entire folders. Eight algorithms, one read of the file, and nothing that ever leaves your Mac.
Designed for macOS 14 and later
Checksums for anything you type — live, as you type it.
Everything above is computed in this page, on your machine — nothing is uploaded. The same eight algorithms have a page each: free SHA-256, SHA-512, SHA-3, MD5 and CRC32 calculators for any text you like.
Hash text as you type. Stream files and whole folders in a single pass. Prove a download is exactly what it claims to be.
Type or paste anything and watch every algorithm resolve at once. Copy a single digest, or all of them. No button to press, no file to save.
Drag in a file, a folder, or all of them. Each checksum streams in a single pass with real-time throughput and time remaining. Pause mid-file and resume from the exact byte — then export a shasum-compatible manifest.
Drop a download and paste its published checksum — even a whole SHA256(file)= line. Rocket Hash detects the algorithm and gives one clear verdict. Or compare two files, byte for byte.
A file is read a single time no matter how many digests you ask for. Memory stays flat — hash a 100 GB disk image without ever loading it into RAM.
No network calls. No telemetry. No accounts. Rocket Hash does all of its work on-device — and there's nothing for it to phone home about.
Every byte is processed locally. Rocket Hash makes no network connections — ever.
No analytics, no accounts, no identifiers. Nothing about your files is collected.
App Sandbox and the hardened runtime, reviewed for the Mac App Store.
Pure Swift and Apple's own frameworks. Zero third-party code in the app.
From modern SHA-3 to legacy checksums — each verified against official NIST test vectors, and clearly labeled so you always know what you're relying on.
Not sure which one you need? Read the decision guide, or browse all checksum guides for Mac.
Real Liquid Glass on macOS 26, with a refined material fallback before it. Spring animations, a glowing verification seal, and subtle haptics throughout.
A translucent window that reads as one seamless panel, with depth that responds to what's on screen.
Morphing copy buttons, rolling counters, drag-and-drop glow, and spring physics on every transition.
It snaps into place the moment a file checks out. Tap to replay.