Key capabilities
- Calculate six common checksum algorithms in one pass
- Stream large files in chunks inside a dedicated worker
- Import GNU, BSD, and SFV checksum manifests
- Files and text stay on your device
File Hash & Checksum
Generate MD5, SHA-1, SHA-256, SHA-512, CRC32, and BLAKE3 checksums for text or batches of files. Verify expected values and checksum manifests without uploading your data.
Checksum input
All hashing runs locally in a browser worker. Files, text, file names, and digest values are never uploaded.
Algorithms
Verify integrity
About File Hash & Checksum
Calculate and verify checksums locally, even for large files. Generate MD5, SHA-1, SHA-256, SHA-512, CRC32, and BLAKE3 checksums for text or batches of files. Verify expected values and checksum manifests without uploading your data. The core workflow is designed to run in your current browser.
Useful for
- Verify that a downloaded file is complete and unchanged
- Publish checksums alongside release artifacts
- Check archives, ROMs, media, and backups before use
Frequently asked questions
Is File Hash & Checksum free to use online?
Yes. File Hash & Checksum opens in a modern browser and does not require desktop software installation.
What is File Hash & Checksum useful for?
Common use cases include Verify that a downloaded file is complete and unchanged; Publish checksums alongside release artifacts.
Is my input or file uploaded?
The core processing workflow is designed to run locally in the browser. Key capabilities include Calculate six common checksum algorithms in one pass, Stream large files in chunks inside a dedicated worker, Import GNU, BSD, and SFV checksum manifests; account, comments, and anonymous analytics may still create normal site requests.
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