Can I sign multiple pages at once?

Run the tool once per page in v1. A multi-page UI is on the roadmap.

Where exactly is (x, y)?

Origin is the bottom-left of the page, units are PDF points (72 = 1 inch). x grows rightward, y grows upward. So y=72 is one inch from the bottom.

Why does my signature look blurry?

Use a high-resolution image (at least 300 dpi at the size you intend to display). PNGs preserve transparency cleanly; JPGs are flatter but smaller.

Sign PDF

Add a signature to a PDF by uploading the PDF and a signature image (PNG/JPG with transparency for best results).

Your files never leave your browser. All processing happens on your device — nothing is uploaded.

1. Upload your files (min 2)

Need at least 2 files (have 0).

How does the Sign PDF work?

Drop a PDF together with a transparent PNG or JPG of your signature, and place it on the chosen page at the specified coordinates. The simplest way to make a signature image: write your name on a white piece of paper, photograph it, then use any background-remover app to make it transparent and save as PNG. The signature is embedded as a real image — it prints, displays, and survives flattening. Coordinates are in PDF points (72 = 1 inch); the origin is the bottom-left of the page. For most documents, x=72, y=72, width=150 puts the signature in the lower-left corner. Conversion runs in your browser.

🔒 Security & Privacy

All processing happens on your device. Your files never leave your browser, never touch our servers, and are not stored anywhere. Close the tab and the file is gone.

📱 Use it on any device

Works in any modern browser — Mac, Windows, Linux, iPhone, Android, and tablets. No installation, no app to download. Just open the page and start.

⚡ Quick & easy

Drag, drop, click. Most files process in seconds, not minutes. No watermarks added to your output, no per-day limits, and the tool always shows the result before asking you to download.

🎁 Always free, no signup

Free to use, every time. No account creation, no email required, no “trial” that converts to a paid plan. We make money from ads so you don’t have to pay.

Frequently asked

No — this places an image of your signature, like signing on paper. For PKI/cert-based digital signatures, use Adobe Acrobat or DocuSign — that's a regulated workflow.