Checksum Verifier
Verify a downloaded file's integrity by comparing its checksum against a published value — instantly inside your browser.
Why verify a checksum?
Software downloads are often published alongside a checksum — a hash of the exact file — so you can confirm the file you downloaded matches exactly what the publisher released, with no corruption from a bad download and no tampering from a compromised mirror. This tool computes a file's checksum locally and compares it against the one you paste in.
GuideHow to use it
How the verification works
The file's exact bytes are hashed locally using the algorithm you select — MD5, SHA-1, SHA-256, or SHA-512 — and the result is compared case-insensitively against the checksum you paste in. If they match exactly, the file is byte-for-byte identical to what the checksum was generated from.
Why it helpsFeatures & benefits
Why this runs entirely in your browser
The file you're verifying stays on your device — hashing happens in JavaScript locally in the tab, and the file itself is never uploaded anywhere.
Common uses
Verifying a downloaded installer or ISO matches its published checksum, checking a file wasn't corrupted during transfer, or confirming a file hasn't been tampered with before running it.
Frequently asked questions
A few things people usually want to know before trusting the numbers.
Use whichever one the publisher provided a checksum for — it's usually labeled clearly, like "SHA256SUMS" or "MD5 checksum". SHA-256 is the most common choice for modern software releases.
The file differs from what the checksum was generated from — this could mean a corrupted or incomplete download, or in rarer cases, a tampered file. Try re-downloading before assuming the worst.
No — the comparison is case-insensitive, so it doesn't matter whether the published checksum uses uppercase or lowercase hex digits.
No. The file never leaves your device — hashing happens locally in your browser using its raw bytes.
No. Everything happens locally in your browser. Nothing about the file is sent to a server, stored, or shared.