ChangeThisFile MCP Server
Convert files between 690+ formats from any MCP client — image, video, audio, document, data, spreadsheet, font, ebook, and archive. Free, no API key, no signup.
Powered by ChangeThisFile.com. Conversions run on real engines (FFmpeg, LibreOffice, Calibre, 7-Zip, sharp, Ghostscript, fonttools, and more) and return a temporary signed download URL. Uploaded files are auto-deleted within 24 hours.
Tools
| Tool | Description |
|---|---|
convert_file |
Convert a file. Pass a publicly accessible source_url or base64_content (max ~5MB), plus a target_format (e.g. pdf, mp3, json). Source format is auto-detected from the URL/filename, or pass source_format explicitly. Returns a download URL valid for 1 hour. |
list_conversions |
List all supported conversion routes, optionally filtered by source_format (e.g. docx → see every format you can convert DOCX into). |
Option 1 — Remote endpoint (recommended, no install)
The server is hosted at https://changethisfile.com/mcp using streamable HTTP transport (MCP spec 2025-03-26). If your client supports remote MCP servers, point it straight at the endpoint:
