File Hash Checker
NewCompute MD5, SHA-1 and SHA-256 file digests and verify them against a checksum.
Ctrl+Enterto compute the hashes
Files
MD5: Collisions are trivial to construct. Fine for detecting accidental corruption, not for verifying authenticity.
SHA-1: Collisions are practical. Treat it as a checksum, not a security guarantee.
Digests
Case-insensitive, and a full sha256sum line works — the filename part is ignored.
Digests appear here. Files are read in your browser and never uploaded.
What is the File Hash Checker?
A file hash checker reads a file and produces a fixed-length fingerprint of its contents. Comparing that fingerprint with the one the publisher lists proves the file arrived intact and unmodified — the standard check after downloading an installer or disk image.
Frequently asked questions
Do large files get uploaded to check the hash?
No. The file is read in 4 MB chunks straight from disk and hashed in your browser, with progress shown as it goes. Nothing is transmitted, and memory use stays flat, so multi-gigabyte ISOs work fine.
Is MD5 still acceptable for verifying downloads?
For catching accidental corruption, yes, and many projects still publish it. For proving nobody tampered with a file deliberately, no — MD5 collisions are easy to construct. Prefer SHA-256 when the publisher offers it.
The hashes do not match. What now?
Re-download first, since truncated transfers are the most common cause, then confirm you compared the right algorithm. If a fresh copy still mismatches the publisher's SHA-256, do not run the file.
Related Network & Diagnostics
File Hash Checker is one of 2 tools in Network & Diagnostics on Toolkit Hub, a free collection of browser-based utilities. It requires no account and no installation. Browse all tools.