Online Tool Store
Checksum Verifier
Compute a file's SHA-256, SHA-1, SHA-384, or SHA-512 checksum and compare it against an expected value to verify integrity. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Computed checksum
How it works
- Choose a file and an algorithm.
- Its checksum is computed automatically.
- Paste the expected checksum to see whether it matches.
FAQ
Why would I verify a checksum?
To confirm a downloaded file wasn't corrupted in transit or tampered with — publishers often list a SHA-256 (or similar) checksum alongside a download so you can verify the file you received matches exactly.
Why isn't MD5 offered?
The browser's Web Crypto API (used here) doesn't include MD5, since it's considered cryptographically weak. For file integrity checks, SHA-256 or stronger is preferred anyway.
Does file size matter?
Larger files take longer to hash since the whole file is read into memory first — this is bounded by your browser and device, not by a fixed limit.
Is my file uploaded anywhere?
No — hashing happens entirely in your browser using the Web Crypto API.
How we compare
| Feature | Online Tool Store | Command-line sha256sum | Other online checksum tools |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | ✓ | ✗ |
| Built-in match/mismatch comparison | ✓ | ✗ | ✓ |
A terminal checksum tool requires knowing the exact command syntax. Checksum Verifier is a click, with the match check built in.