All toolsTOOL 02 / FILE INTEGRITY
Compare every byte.
A cryptographic checksum is a compact fingerprint of a file. Calculate one locally, then compare it with the digest published by the source you already trust.
- Processing
- File stays in this browser
- Boundary
- Sameness only — no malware verdict
File checksum
No file selected
Your file stays on this device
Paste a checksum from a source you already trust.
SHA-256 result
Choose a file, then calculate or compare its checksum.
A matching checksum confirms identical bytes only. It does not scan for malware or prove who published the file.
HOW IT WORKS
Know what the result means.
- [01]
Choose
Select a file and the same SHA algorithm named by its publisher. The file is read in local chunks.
- [02]
Calculate
The tool produces the file's hexadecimal digest using the selected SHA-2 function.
- [03]
Compare
Paste the checksum from a trusted publisher. An exact match means both inputs produced the same digest.
READ THE LIMITS
A signal is not a verdict.
- A matching checksum shows file integrity, not that the file is harmless.
- A checksum copied from an untrusted page cannot establish publisher trust.
- Choose the exact algorithm stated by the publisher; SHA-256 and SHA-512 outputs are different lengths.
- Files are processed locally and are not uploaded by this tool.