file_copy

File Conversion

Operational

Convert documents between DOCX, PDF, HTML, Markdown, and more

API Overview

The File Conversion API handles bi-directional document format conversion across a broad matrix of input and output types. Submit your file as a base64-encoded payload and specify the target format. The service preserves headings, tables, lists, images, and basic formatting as faithfully as possible across conversion boundaries. Supports DOCX, PDF, HTML, Markdown, plain text, RTF, and ODT. Perfect for normalizing document inputs in AI pipelines or building self-service document portals.

autorenew

Broad Format Matrix

Convert between DOCX, PDF, HTML, Markdown, RTF, ODT, and plain text in any direction.

table_chart

Structure Preservation

Headings, tables, lists, and inline formatting survive the conversion with high fidelity.

api

Base64 Transport

Files are sent and received as base64 strings — no multipart uploads or presigned URLs needed.

upload_file

Up to 20 MB

Handles large documents with async mode for files that exceed the synchronous threshold.

integration_instructions API Reference

data_object openapi.json open_in_new Swagger UI

data_object

OpenAPI Spec

openapi.json

open_in_new

description

Swagger UI

Interactive API explorer

open_in_new

POST /api/convert

Body Parameters

Parameter	Type	Required	Description
`file`	string	Yes	Base64-encoded file content
`from`	string	Yes	Source format: docx, rtf, txt
`to`	string	Yes	Target format: pdf, docx, txt

terminal API Playground

Live Simulation

file * (string)

from * (string)

to * (string)

import requests
import base64

with open("document.docx", "rb") as f:
    encoded = base64.b64encode(f.read()).decode()

url = "https://api.picopayd.codefission.co.uk/files/api/convert"
headers = {
    "Content-Type": "application/json",
    "X-PAYMENT": "<402-payment-token>"
}
payload = {
    "fromFormat": "docx",
    "toFormat": "pdf",
    "content": encoded
}

response = requests.post(url, json=payload, headers=headers)
print(response.json())

import { readFileSync } from "fs";

const fileContent = readFileSync("document.docx");
const encoded = fileContent.toString("base64");

const response = await fetch(
  "https://api.picopayd.codefission.co.uk/files/api/convert",
  {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "X-PAYMENT": "<402-payment-token>"
    },
    body: JSON.stringify({
      fromFormat: "docx",
      toFormat: "pdf",
      content: encoded
    })
  }
);
const data = await response.json();
console.log(data);

curl -X POST https://api.picopayd.codefission.co.uk/files/api/convert \
  -H 'Content-Type: application/json' \
  -H 'X-PAYMENT: <402-payment-token>' \
  -d '{"fromFormat": "docx", "toFormat": "pdf", "content": "<base64-encoded-file>"}'

Response Body 200 OK

{
  "success": true,
  "toFormat": "pdf",
  "content": "JVBERi0xLjQK...",
  "encoding": "base64",
  "sizeBytes": 48210
}

PicoPayd

File Conversion

API Overview

Pricing Details

terminal API Playground

Related Document APIs

HTML to PDF