Know what is missing
Photo backup self-check
Find the evidence missing from your backup plan. Six self-reported checks become a concrete next-action list.
Open toolSmall tools with a defined job
A clearer next step.
These tools process their inputs in this page. They do not log into accounts or certify that a library is recoverable.
Check a copied file
Local file copy checker
Compare two selected files byte by byte and view their SHA-256 fingerprints. No file upload. Up to 32 MiB per file.
Open toolMake room to grow
Backup space planner
Budget one new full copy with growth, retained versions and reserve. See the formula, capacity gap and GB/GiB equivalent.
Open toolWhat “local” means here
The file checker reads only two files you choose. The other tools use typed numbers or checkboxes. Tool code does not upload or persist these inputs. Loading a website still makes hosting requests; read the privacy details.
The tools are intentionally limited. For large archives, use an appropriate batch verification and backup system. Begin with the recovery drill before deciding what evidence you need.