2026-04-05
Added a one-click rescan action for checksum outputs so users can rerun quickly with the same file.
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offlinewebtools.com — free, watermark-free browser tools that stay on your device with nothing uploading to our servers
File Checksums
Calculate MD5, SHA1, and SHA256 checksums to verify file integrity and detect changes
Free to use, no watermarks, runs in your browser—nothing uploads to our servers
Checksum Algorithms Comparison
MD5
128-bit hash, fast but less secure
SHA1
160-bit hash, deprecated for security
SHA256
256-bit hash, recommended for security
Recent changes
2026-04-03
Added machine-readable JSON and CSV checksum export formats for easier verification automation.
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Keep a local, session-only record of successful file analyses in this browser session.
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Session download history
Re-download generated file outputs from this browser session.
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