File Hash Checker
Compute MD5, SHA-256 and SHA-512 checksums of any file in your browser. Verify downloads against an expected hash — nothing is uploaded.
What is the File Hash Checker?
The File Hash Checker computes cryptographic fingerprints (MD5, SHA-256 and SHA-512) for any file you select. Hashes are calculated entirely in your browser from the file bytes — the file is never uploaded.
Publishers often list SHA-256 checksums next to downloads so you can verify the file was not corrupted or tampered with in transit. Matching hashes means the bytes are identical to the publisher’s original.
You can also paste an expected hash to get an immediate match or mismatch result, which is useful when verifying ISOs, firmware, datasets or release archives.
How to use the File Hash Checker
- 1Drop or select a file.
- 2Wait for MD5, SHA-256 and SHA-512 to appear.
- 3Optionally paste an expected hash to verify a match.
- 4Copy any hash value you need.
When to use the File Hash Checker
- Verify a Linux ISO against the publisher’s SHA-256.
- Confirm a downloaded SDK zip was not truncated.
- Compare two builds by hashing both files separately.
- Document checksums for internal release notes.
Key features
- MD5, SHA-256 and SHA-512
- Local ArrayBuffer hashing
- Expected-hash comparison
- One-click copy
Important notes
- MD5 is fine for accidental-corruption checks but is not collision-resistant for security proofs — prefer SHA-256 when authenticity matters.
- Hashing happens on-device; very large files may take noticeable time depending on your hardware.
Frequently asked questions
What does a matching hash prove?
That your file bytes are identical to the reference. It does not by itself prove who authored the reference hash.
Why offer MD5 at all?
Many older mirrors still publish MD5. Use SHA-256 when both are available.
Is the file uploaded?
No. Digests are computed locally with the Web Crypto API (and a local MD5 routine).
Can two different files share a SHA-256?
Finding intentional SHA-256 collisions is considered computationally infeasible with current public techniques.
All Developer Tools
Tap any tool to jump straight in — no signup, works on mobile.