Verify file integrity with a checksum
Confirm a download arrived intact, or prove a file has not changed, by computing its cryptographic hash locally and comparing it to the expected value.
Open this tool in FileX →Free · runs 100% in your browser · no upload, no account
How it works
- Open the Integrity tool and drop in your file.
- Read off the SHA-256 (or SHA-384 / SHA-512) digest, computed in your browser.
- Compare it character-for-character to the checksum the publisher listed. A match means the bytes are identical; a mismatch means the file was altered or corrupted.
When to check a checksum
Verify installers and firmware before running them, confirm a large file transferred without corruption, or fingerprint a document so you can later prove it was not modified. FileX also supports HMAC when you need a keyed check.
Frequently asked questions
Which hash algorithms are supported?
SHA-256, SHA-384, and SHA-512 from the SHA-2 family, plus SHA-1 for legacy comparisons and HMAC for keyed verification. All computed locally via the Web Crypto API.