Merge Multiple PDFs into One Document

# Merge multiple PDF files into one
curl -X POST \
  https://api.convertfilefast.com/v2/pdf/merge \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "files=@document1.pdf" \
  -F "files=@document2.pdf" \
  -F "files=@document3.pdf" \
  --output merged.pdf

# HTTP 200 OK — Content-Type: application/pdf

import requests

files_to_merge = ["document1.pdf", "document2.pdf", "document3.pdf"]

files = [("files", open(f, "rb")) for f in files_to_merge]

response = requests.post(
    "https://api.convertfilefast.com/v2/pdf/merge",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    files=files
)

with open("merged.pdf", "wb") as f:
    f.write(response.content)

const formData = new FormData();

// Loop through array of files to merge
const filesToMerge = ["document1.pdf", "document2.pdf", "document3.pdf"];
filesToMerge.forEach((fileName) => {
  formData.append("files", fs.createReadStream(fileName));
});

const response = await fetch(
  "https://api.convertfilefast.com/v2/pdf/merge",
  {
    method: "POST",
    headers: { "Authorization": "Bearer YOUR_API_KEY" },
    body: formData,
  }
);

fs.writeFileSync("merged.pdf", Buffer.from(await response.arrayBuffer()));

// n8n HTTP Request Node
{
  "method": "POST",
  "url": "https://api.convertfilefast.com/v2/pdf/merge",
  "contentType": "multipart-form-data",
  "bodyParameters": {
    "parameters": [
      { "name": "files", "parameterType": "formBinaryData", "inputDataFieldName": "data" }
    ]
  },
  "options": { "response": { "responseFormat": "file" } }
}