🗂️ Cross-Platform Filename Safety Checker

Paste names copied from a file list. Preview Windows-reserved characters and device names, trailing dots/spaces, Unicode normalization, and case-insensitive collisions before you share or move the files. It never opens or renames files.

Paste filenames to create a preview.

Original nameProposed nameNotes
No names checked yet.

This is a portability preview, not a bulk renamer. Windows reserves names such as CON and does not allow < > : " / \\ | ? *; this checker applies those restrictions and catches case-only collisions. Check your destination filesystem’s byte and path-length limits too.