Checksum File Mover
About Checksum File Mover
Pick a source folder, pick one or more destinations, and the tool copies or moves each file while computing checksums on both ends. Mismatches are retried; everything is recorded in a JSON manifest and plaintext activity log you can export. Useful for archival transfers, project handoffs, build-artifact pinning, and media backups.
How To Use
- Choose source files or a source folder, then choose a writable destination folder when your browser supports it.
- Select copy or move, choose SHA-256 or SHA-1, and start the verified transfer.
- Review the verification log, then export the JSON manifest or text log for your records.
Example
Input: A folder of project files and a backup destination folder.
Output: A verified transfer manifest with SHA-256 or SHA-1 checksums for each copied file.
Who Uses Checksum File Mover
- People who want quick private utilities (timers, PDF, emoji, etc.).
- Anyone avoiding installs and uploads.
- Users who value private — files and text stay on your device and are never uploaded to a server.
Frequently Asked Questions
Does this upload my files anywhere?
No. The tool uses the browser's File System Access API to read your source folder and write to your destination folder directly. Files never leave your machine.
Which checksum algorithms are supported?
SHA-256 by default and SHA-1 as a faster option. Both are computed locally with the Web Crypto API.
What happens if a copy doesn't match the source?
The destination file is rewritten and re-verified. Repeated mismatches are recorded in the manifest and activity log so you can investigate the bad media.