SHA-256 Checksum Calculator
Calculate SHA-256 checksums for any file or text directly in your browser. SHA-256 is the standard for secure file verification — used by Linux distributions, software publishers, and security tools. Verify downloads, detect tampering, and confirm file integrity with cryptographic certainty.
Frequently Asked Questions
›Why use SHA-256 for checksums instead of MD5?
SHA-256 is cryptographically secure — it can detect both accidental corruption and intentional tampering. MD5 is only reliable for accidental corruption since collisions can be crafted. Most modern software uses SHA-256 checksums.
›How do I verify a downloaded file?
Upload the file here to get its SHA-256 checksum, then compare it character-by-character with the checksum published by the software vendor. Use the Verify feature to paste the expected hash and check automatically.
›Is this secure?
Yes. The checksum is calculated entirely in your browser using the Web Crypto API. Your files are never uploaded to any server.