Verify a download without guessing which checksum to use
Match the release, algorithm and complete digest before deciding whether a downloaded file agrees with its publisher's reference.
Private by architecture
Private file hash calculator.
Zero uploads.
Generate SHA-256, MD5, BLAKE3 and 23 more hashes for files or text without uploading the selected content. Your data stays on your device.
26 algorithms4 MiB streaming chunksNo account required
01
Choose algorithms
Every selected algorithm is calculated in one pass.
SHA-2
SHA-3 & Keccak
Modern
Legacy
Fast checksums
02
Add your input
Files are read in chunks and never leave this page.
03
Results
Copy one value or export the complete set.
Your selected hash values will appear here.
Generate hashes first to unlock local hash verification.
Generate hashes first to unlock local hash verification.
FROM A DIGEST TO A DECISION
Check the file you received against the file you expected
A file can have the right name and contain different bytes. Start with the algorithm named beside the publisher’s checksum, select the completed download and generate its hash. Then paste the full expected value into the verification panel. The comparison is only as useful as the reference you trust.
Keep a small verification record: filename, release version, algorithm, full digest and the page that supplied the reference. A matching checksum checks those bytes; it does not scan a file for malware or certify its author.
Why identical-looking text can have different hashes
Reproduce two SHA-256 values and see exactly what a trailing newline changes in UTF-8 text.
Diagnose a checksum mismatch before repeating the download
Separate wrong references, different bytes and incompatible output formats so every retry checks a specific cause.
Choose a hash for the comparison you actually need
Start with the recipient's algorithm, then distinguish secure digests from fast checksums and password-hashing systems.
LOCAL PROCESSING
What the calculator reads
File mode processes the original bytes in 4 MiB chunks. Text mode encodes the text you enter as UTF-8. The calculation does not upload the selected content. Loading the website still makes network requests, and device memory and browser limits still affect large jobs. Read the privacy explanation.