What counts as an "unsafe" character?

Anything outside letters, digits, dots, underscores and hyphens — spaces, accents, symbols like ! or ? — is replaced with a hyphen.

Does it handle Vietnamese or other accented filenames?

Yes — accented characters (including Vietnamese đ/Đ) are transliterated to plain ASCII before cleaning.

No — it runs entirely in your browser.

Clean a filename for safe use in URLs, shells and every filesystem — accents transliterated, unsafe characters replaced.

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Filename

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1
Type or paste a filename

Even one with spaces, accents or symbols.
2
Cleaned instantly

Accents are transliterated, unsafe characters become hyphens, extension is lowercased.
3
Copy the safe filename

Ready to use in a URL, a shell command or any filesystem.

What counts as an "unsafe" character?: Anything outside letters, digits, dots, underscores and hyphens — spaces, accents, symbols like ! or ? — is replaced with a hyphen.
Does it handle Vietnamese or other accented filenames?: Yes — accented characters (including Vietnamese đ/Đ) are transliterated to plain ASCII before cleaning.
Does this tool upload my filename anywhere?: No — it runs entirely in your browser.