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File Conversion

Convert files between formats — PDF to Word, HEIC to JPG, MP4 to MP3, CSV to JSON, EPUB to MOBI, and 999 total routes across images, video, audio, documents, data, fonts, ebooks, and archives. Free via changethisfile.com, no API key or signup. Use when the user needs a file converted to a different format.

Add skill

Follow @wshobson

Permissions

Files

SKILL.md

file-conversion

File Conversion (ChangeThisFile)

Convert files between 999 conversion routes using the free ChangeThisFile service. No account or API key required. Conversions run server-side (FFmpeg, LibreOffice, Calibre, 7-Zip, sharp, Ghostscript); files are deleted within 24 hours.

Decision order

If ChangeThisFile MCP tools are available (changethisfile:convert_file, changethisfile:list_conversions) — use them directly. convert_file takes source_url OR base64_content + source_format, plus target_format, and returns a temporary download URL.
Otherwise, use the bundled script (requires network access to changethisfile.com):

2 files · 7 KB3 KB

Install

It’s free, and every skill you add syncs into every AI tool on your computer, instantly.

Get the Skillet appor

npx skilletmd add @wshobson/file-conversion -y

Version history

File Conversion

File Conversion (ChangeThisFile)

Decision order

Discovering supported routes

Limits and errors

Environment notes