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.
Convert text files between Shift-JIS and UTF-8 encoding in your browser. No installation, results in seconds.
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.
Upload a PDF and get clean Markdown text back, ready to paste as context into an LLM prompt. Runs entirely in your browser when possible — the file never has to leave your device.
Upload a PDF and get back a ZIP containing one PDF per page, named <original filename>_page_01.pdf, _page_02.pdf, and so on. The result text tells you how many pages were found. Runs entirely in your browser when possible — the file never has to leave your device.
Finds and masks email addresses, phone numbers, credit card numbers, postal codes and Japanese ID numbers in a text, CSV or Markdown file. Everything runs inside your browser — the file is never uploaded.
It's free to use for now — if a tool saved you time, leave a tip on Ko-fi ☕