Important limitations
- Checks names, paths, and metadata rather than file contents or recipient-app compatibility
- Does not modify originals; ZIPs are inspected without extraction
- Up to 100,000 entries; does not guarantee transfer success
macOS
File Transfer Preflight
Check filenames and paths before handing off a folder or ZIP.
macOS 14+$9.99 · one-time purchaseEnglish & Japanese
Store information checked: 2026-10-26 · Check the store for current prices and regional availability.
A SMALL TOOL FOR A REAL TASK
Catch filename and path issues before a handoff.
For people delivering folders or ZIPs to clients and colleagues. Review destination-specific naming rules, path lengths, and collisions locally before you share a file.
What it does
- Windows / Office, OneDrive / SharePoint, and cross-platform ZIP profiles
- Check reserved names, invalid characters, long paths, and case or Unicode collisions
- Estimate resulting paths using an optional destination root
- Review explanations and suggestions; export CSV or HTML reports
A LOOK INSIDE
Inside the app
Privacy characteristics
Local inspection with no network access, account, advertising, or analytics. Exported names and paths may themselves be confidential.
Read this app’s privacy policy ↗GOOD TO KNOW
Common questions
Does it change my files?
No. It never renames, deletes, moves, or rewrites originals. ZIP files are inspected without extraction.
Does it connect to OneDrive or SharePoint?
No. It applies the selected destination rules to names and paths locally on your Mac.
Does a clean result guarantee a successful transfer?
No. It does not validate file contents or opening files in recipient apps. Findings are guidance for review before handoff.
What should I do after a filename or path-length warning?
Keep your originals intact, review the reported explanation and suggested action, make agreed manual changes on your delivery copy, and rescan the final folder or rebuilt ZIP before handoff.
How should I handle a case or Unicode collision?
Similar names do not establish identical file contents. Inspect every affected entry and project reference, rename necessary files so they remain distinct on the destination system, and rescan.
Need a hand?
Tell us the app name, OS version, and what happened.