local / SHA-256 / privacy-first

Verify checksums against a manifest.

Calculate locally and classify each file as match, changed, missing, or extra.

Choose files

Files to verifyUp to 100 files, 256 MiB per file, and 512 MiB total. Contents stay on this device.Expected manifest (optional)JSON with a rows or files array containing filename, bytes, and sha256.

Choose local files, then calculate.

Status	Filename	Expected bytes	Actual bytes	SHA-256

Boundaries

Review match, changed, missing, and extra rows before explicitly saving a report.
Files are not uploaded; there is no external request or automatic storage.
A checksum confirms identity, not safety or authenticity.

Single-file checksum / 日本語