Verify file integrity
Compare hashes to check whether a download matches the publisher-provided checksum.
File Checksum Calculator
Calculate SHA checksums locally in your browser. Your file is never uploaded.
File Checksum Calculator
Calculate SHA checksums locally without uploading your file.
All processing happens locally in your browser.
How to use File Checksum Calculator
- 1
Choose a file from your device.
- 2
Select SHA-256, SHA-384, SHA-512, or SHA-1.
- 3
Calculate and compare the hexadecimal checksum with the expected value.
Why use this tool?
Modern SHA options
SHA-256, SHA-384, and SHA-512 are available alongside legacy SHA-1.
File remains local
Web Crypto reads the file in your browser and does not upload it.
Frequently asked questions
Which checksum algorithm should I use?
Use the same algorithm as the checksum published by the file provider. Prefer SHA-256 or stronger for new workflows.
Why does changing one byte change the checksum?
Cryptographic hash functions are designed so even a tiny file change produces a very different digest.
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