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Checksum Manifest (SHA256SUMS)
Create or verify SHA256SUMS, MD5SUMS and SFV checksum files for many files at once.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Checksum Manifest (SHA256SUMS) works
Each file is hashed in 8 MB pieces with hash-wasm, so large files work without filling memory. Verify reads GNU, BSD and SFV lines, matches files by name, and marks each one as a match, changed or missing.
Input: Any file, SHA256, MD5, SFV. Output: SHA256, MD5, SFV.
How to use Checksum Manifest (SHA256SUMS)
- Pick Create or Verify.
- Drop the files (and the checksum file for Verify).
- Download the manifest or read the results.
Tips
- Nothing is uploaded. Your files stay in this browser tab.
Checksum Manifest (SHA256SUMS) FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
Related tools
- Checksum Verifier: Check many downloads against SHA256SUMS or MD5 lists, or make your own checksum file.
- Hash Generator: MD5, SHA-1, SHA-256, SHA-512 for text and files.
- File Splitter & Joiner: Split any big file into parts (.001, .002) by size or count, and join parts back into one file.
- Open Any Archive: Open ZIP, 7Z, RAR, TAR, GZ, XZ, ISO, CAB, DEB, RPM, JAR and more. Preview files and download what you need.