convert_file

convert

Convert a file between any of Convert Fleet's 178+ supported formats (documents, images, audio, video, e-books, archives, fonts, spreadsheets). Provide the input as a public file_url (preferred) or inline file_base64 + filename, and the target_format (e.g. 'pdf', 'mp3', 'docx', 'webp'). Returns a short-TTL signed download URL for the converted file. Use list_supported_formats first if unsure a target is valid.

When to use: The user has a file in one format and needs it in another: docx to pdf, heic to jpg, wav to mp3, mkv to mp4, epub to mobi, csv to xlsx, svg to png. This is the default tool for any 'turn X into Y' request and covers 178+ formats.
Not for: Keeping the same format and only making the file smaller (compress_file). Rearranging pages inside a PDF (pdf_operation). Rendering a live web page (html_to_pdf).
Returns: A short-TTL signed download URL for the converted file, plus its size and content type.

Parameters

Name	Type	Required	Description
file_url	string	no	Public http(s) URL of the input file (preferred for agents). Internal/metadata IPs are blocked.
file_base64	string	no	Base64 of the input file for small inline uploads (<=15MB). Provide 'filename' too. Use file_url for larger files.
filename	string	no	Original filename incl. extension (used to detect the source format), e.g. 'invoice.docx'.
mime_type	string	no	Optional MIME type of the input.
target_format	string	yes	Target format extension, e.g. 'pdf', 'png', 'mp3', 'docx', 'webp'.
source_format	string	no	Optional explicit source format if it can't be inferred from the filename.
output_filename	string	no	Optional desired output filename.

Example call

JSON-RPC tools/call body (sent to https://convertfleet.com/api/mcp):

{
  "jsonrpc": "2.0", "id": 1, "method": "tools/call",
  "params": { "name": "convert_file", "arguments": {
               "file_url": "https://example.com/input",
               "target_format": "pdf"
             } }
}

Connect first

curl -sN https://convertfleet.com/api/mcp \
  -H "Authorization: Bearer flt_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'

See the quickstarts for Hermes, Claude, Cursor, OpenClaw, n8n, Zapier and Make.