API Reference
Complete Convert File Fast API documentation. Convert files to PDF using our simple and scalable REST API.
Base URL
https://api.convertfilefast.comAuthentication
Use the X-API-Key header with your key
Endpoints
Documents to PDF
HTML to PDF
PDF to Others
PDF Operations
Image Conversion
Images to PDF
Image Operations
Data Conversion
Supported Formats
.docxWord
.xlsxExcel
.pptxPowerPoint
.htmlHTML
.mdMarkdown
.jpg/.pngImages
.txtText Extract
.pdfPDF Operations
Error Codes
400Invalid file or unsupported format
401Missing or invalid API Key
413File exceeds size limit
429Monthly conversion limit reached
500Internal server error