Best Free Sign PDF

How it works

1. Upload. Choose the PDF you need to sign (up to 100 MB).
2. Add a signature. Upload a signature image or type your name, then set the page and position.
3. Download. The signed PDF downloads automatically; nothing is stored.

About this tool

Sign PDF places a signature onto a page of your document. Upload an image of your signature to stamp it on, or type your name to drop a text signature, then set which page and where it lands. It is built for the everyday case of signing a form, a letter or a contract without printing, signing and scanning it back. The signature is embedded into the PDF itself. No watermark, no signup, processed in memory and discarded.

What people use it for

• Sign a contract or agreement without printing it
• Add your signature to a form before emailing it
• Place initials on a specific page of a document
• Stamp a typed signature when you have no scan

Developer API

Automate this tool from your own code. Send a POST request to the endpoint below and get the same result the web tool produces. It is rate-limited per IP and needs no signup — API keys for higher limits are coming.

• cURL
• Python
• JavaScript

curl -X POST https://best.free/api/tools/pdf-sign/ \
  -F 'file=@contract.pdf' \
  -F 'signature=@signature.png' \
  -F 'text=Jane Doe' \
  -F 'page=1' \
  -F 'x=350' \
  -F 'y=680' \
  -F 'width=160' \
  -o signed.pdf

import requests

files = {"file": open("contract.pdf", "rb"), "signature": open("signature.png", "rb")}
data = {"text": "Jane Doe", "page": 1, "x": 350, "y": 680, "width": 160}

r = requests.post("https://best.free/api/tools/pdf-sign/", files=files, data=data)
with open("signed.pdf", "wb") as out:
    out.write(r.content)

const fd = new FormData();
fd.append("file", fileInput.files[0]);
fd.append("signature", fileInput.files[0]);
fd.append("text", "Jane Doe");
fd.append("page", 1);
fd.append("x", 350);
fd.append("y", 680);
fd.append("width", 160);

const r = await fetch("https://best.free/api/tools/pdf-sign/", { method: "POST", body: fd });
const blob = await r.blob();  // the signed.pdf

Response: The PDF with a signature image or text placed on a page.

Frequently asked questions