Single-purpose file tools

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.

Turns a Word document into Markdown, keeping headings, bold and italic, lists, tables and links. Excel (.xlsx) and PowerPoint (.pptx) files work on this page too. Everything runs inside your browser — the file is never uploaded.

Turns Excel sheets into Markdown tables you can paste straight into GitHub, a README or a wiki. Every sheet gets its own heading, and dates and percentages come out formatted rather than as raw serial numbers. Word (.docx) and PowerPoint (.pptx) work on this page too. Everything runs inside your browser — the file is never uploaded.

Pulls slide titles, bullets, tables and speaker notes out of a deck as Markdown. Speaker notes are included by default, so the result reads as a script rather than a list of fragments. Word (.docx) and Excel (.xlsx) work on this page too. Everything runs inside your browser — the file is never uploaded.

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.