FileName Preflight — Cross-Platform Path Checker

FileName Preflight is a local browser utility for catching file-name and path portability problems before release, delivery, or collaboration.

It checks for:

- Windows-invalid characters

- Reserved Windows names such as CON, PRN, AUX, NUL, COM1-9 and LPT1-9

- Trailing dots and spaces

- Case-insensitive path collisions

- Unicode normalization collisions

- Non-NFC file names

- Invisible and bidirectional control characters

- Long paths and path components

- Common OS-generated junk files such as .DS_Store, Thumbs.db and __MACOSX

Useful for:

- Digital product delivery

- Game projects

- Video and media asset folders

- Shared project folders

- ZIP/package preparation

- Cross-platform collaboration

You can select a folder or paste a list of relative paths manually.

Reports:

- CSV

- TXT

- Copy to clipboard

Privacy & safety:

- Runs entirely locally in your browser

- No file uploads

- No external API

- Does not rename, move, modify, or delete source files

- No installation required

The interface can be switched between English and Japanese.

Note:

This is a preflight aid. It cannot guarantee compatibility with every operating system, application, or file system.

Need more than one preflight check?

Get the QuietByte Preflight Utility Pack and receive all 3 tools:

- FileName Preflight

- FolderProof

- LinkProof

Bundle price: $5.99

https://quietbyte-lab.itch.io/preflight-utility-pack