Single-purpose file tools

Small, focused tools for one-off file jobs — convert an encoding, check what encoding a file actually is, that kind of thing. No account, no install, no file kept on our servers. Pick a tool below.

Shift-JIS ⇔ UTF-8 Converter

Convert text files between Shift-JIS and UTF-8 encoding in your browser. No installation, results in seconds.

Text File Encoding Detector

Upload a text file to find out what encoding it's actually in — UTF-8, Shift-JIS, EUC-JP, Windows-1252, GB18030, and more. Detection only — no conversion.

It's free to use for now — if a tool saved you time, leave a tip on Ko-fi ☕