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1,000+ conversion routes plus translate, extract tables, compress. 25 free/month, then a free key.

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check_job Read-only

Check the status of a previously submitted file job (translate_file, extract_tables, compress_file). Returns the current status, preview + checkout link for completed paid jobs, or the download URL for completed free/paid-and-unlocked jobs.

job_idstring, required

The job_id returned by a job tool

Tools (7)

check_job

read-only

Argument	Type	Description
job_id*	string	The job_id returned by a job tool

Input schema (JSON)

{
  "type": "object",
  "required": [
    "job_id"
  ],
  "properties": {
    "job_id": {
      "type": "string",
      "description": "The job_id returned by a job tool"
    }
  }
}

compress_file

Compress a file (PDF, JPG, PNG, WebP, MP4, MOV, WebM) down to an exact target size — e.g. "under 5MB for an upload form". FREE (daily limit applies). Returns a download URL on success; if the target is physically unreachable it fails honestly and reports the smallest achievable size. Provide EITHER source_url OR base64_content, plus a filename with extension.

Argument	Type	Description
filename	string	Filename WITH extension (e.g. "report.pdf"). Required when the format cannot be inferred from source_url.
source_url	string	Publicly accessible URL of the input file (preferred for large files)
base64_content	string	Base64-encoded file content (for small files)
target_size_kb*	integer	Target maximum size in kilobytes (e.g. 5120 for 5MB). Min 50KB.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "target_size_kb"
  ],
  "properties": {
    "filename": {
      "type": "string",
      "description": "Filename WITH extension (e.g. \"report.pdf\"). Required when the format cannot be inferred from source_url."
    },
    "source_url": {
      "type": "string",
      "description": "Publicly accessible URL of the input file (preferred for large files)"
    },
    "base64_content": {
      "type": "string",
      "description": "Base64-encoded file content (for small files)"
    },
    "target_size_kb": {
      "type": "integer",
      "description": "Target maximum size in kilobytes (e.g. 5120 for 5MB). Min 50KB."
    }
  }
}

convert_file

Convert a file from one format to another. Anonymous callers get 25 free conversions per month per network; after that a free verified ChangeThisFile API key is required (25/month shared across REST + MCP; send it as Authorization: Bearer ctf_sk_…). Pass EITHER a publicly accessible URL (source_url) OR base64-encoded file contents (base64_content + source_format) — exactly one is required. Returns a temporary download URL (valid 1 hour; file deleted within 24 hours).

Argument	Type	Description
filename	string	Optional filename hint for auto-detection (e.g. "document.docx"). Include this for extensionless download URLs when known.
source_url	string	Publicly accessible URL of the file to convert (preferred for large files)
source_format	string	Source format extension (e.g. "docx", "mp4"). Optional: detected from filename, URL response filename, or file bytes when omitted.
target_format*	string	Target format extension (e.g. "json", "mp3", "pdf"). Required.
base64_content	string	Base64-encoded file content (for small files; max ~5MB)

Input schema (JSON)

{
  "type": "object",
  "required": [
    "target_format"
  ],
  "properties": {
    "filename": {
      "type": "string",
      "description": "Optional filename hint for auto-detection (e.g. \"document.docx\"). Include this for extensionless download URLs when known."
    },
    "source_url": {
      "type": "string",
      "description": "Publicly accessible URL of the file to convert (preferred for large files)"
    },
    "source_format": {
      "type": "string",
      "description": "Source format extension (e.g. \"docx\", \"mp4\"). Optional: detected from filename, URL response filename, or file bytes when omitted."
    },
    "target_format": {
      "type": "string",
      "description": "Target format extension (e.g. \"json\", \"mp3\", \"pdf\"). Required."
    },
    "base64_content": {
      "type": "string",
      "description": "Base64-encoded file content (for small files; max ~5MB)"
    }
  }
}

do_file_job

Describe what you want done to a file in plain language — e.g. "translate this contract to German", "pull every table out of this PDF into Excel", "shrink this video to under 25MB", "convert this to PDF". The instruction is routed to the right job automatically; if the request is not supported yet you get an honest explanation of what is. Provide EITHER source_url OR base64_content, plus a filename with extension.

Argument	Type	Description
filename	string	Filename WITH extension (e.g. "report.pdf"). Required when the format cannot be inferred from source_url.
source_url	string	Publicly accessible URL of the input file (preferred for large files)
instruction*	string	What to do with the file, in plain language (any language)
base64_content	string	Base64-encoded file content (for small files)

Input schema (JSON)

{
  "type": "object",
  "required": [
    "instruction"
  ],
  "properties": {
    "filename": {
      "type": "string",
      "description": "Filename WITH extension (e.g. \"report.pdf\"). Required when the format cannot be inferred from source_url."
    },
    "source_url": {
      "type": "string",
      "description": "Publicly accessible URL of the input file (preferred for large files)"
    },
    "instruction": {
      "type": "string",
      "description": "What to do with the file, in plain language (any language)"
    },
    "base64_content": {
      "type": "string",
      "description": "Base64-encoded file content (for small files)"
    }
  }
}

extract_tables

Extract every table from a PDF or image (PNG, JPG, WebP) into a clean multi-sheet Excel file. The job runs immediately and returns a FREE preview of the first table plus a secure Stripe checkout link — the full .xlsx unlocks after payment ($3.99, one-time, no account needed). Provide EITHER source_url OR base64_content, plus a filename with extension.

Argument	Type	Description
filename	string	Filename WITH extension (e.g. "report.pdf"). Required when the format cannot be inferred from source_url.
source_url	string	Publicly accessible URL of the input file (preferred for large files)
base64_content	string	Base64-encoded file content (for small files)

Input schema (JSON)

{
  "type": "object",
  "required": [],
  "properties": {
    "filename": {
      "type": "string",
      "description": "Filename WITH extension (e.g. \"report.pdf\"). Required when the format cannot be inferred from source_url."
    },
    "source_url": {
      "type": "string",
      "description": "Publicly accessible URL of the input file (preferred for large files)"
    },
    "base64_content": {
      "type": "string",
      "description": "Base64-encoded file content (for small files)"
    }
  }
}

list_conversions

List all supported conversion routes. Optionally filter by source format to see what you can convert FROM a specific format.

read-only

Argument	Type	Description
source_format	string	Filter by source format (e.g. "docx" returns all DOCX target options)

Input schema (JSON)

{
  "type": "object",
  "required": [],
  "properties": {
    "source_format": {
      "type": "string",
      "description": "Filter by source format (e.g. \"docx\" returns all DOCX target options)"
    }
  }
}

translate_file

Translate a document into another language with the original layout and formatting preserved (DOCX, PPTX, XLSX, PDF, TXT, MD, SRT, VTT). The job runs immediately and returns a FREE preview of the first pages plus a secure Stripe checkout link — the full translated file unlocks after payment ($4.99, one-time, no account needed). Provide EITHER source_url OR base64_content, plus a filename with extension.

Argument	Type	Description
filename	string	Filename WITH extension (e.g. "report.pdf"). Required when the format cannot be inferred from source_url.
source_url	string	Publicly accessible URL of the input file (preferred for large files)
base64_content	string	Base64-encoded file content (for small files)
target_language*	string	Target language name, e.g. "Spanish", "Japanese", "Brazilian Portuguese"

Input schema (JSON)

{
  "type": "object",
  "required": [
    "target_language"
  ],
  "properties": {
    "filename": {
      "type": "string",
      "description": "Filename WITH extension (e.g. \"report.pdf\"). Required when the format cannot be inferred from source_url."
    },
    "source_url": {
      "type": "string",
      "description": "Publicly accessible URL of the input file (preferred for large files)"
    },
    "base64_content": {
      "type": "string",
      "description": "Base64-encoded file content (for small files)"
    },
    "target_language": {
      "type": "string",
      "description": "Target language name, e.g. \"Spanish\", \"Japanese\", \"Brazilian Portuguese\""
    }
  }
}