Sign PDF
Sign a PDF document by drawing a signature or uploading an image. Place it on any page at your chosen position. Free, private, and browser-based. Your files never leave your device.
Drop files here or browse
Supports PDF - up to 100 MB
Tips for signing PDFs
Draw or upload your signature
Use the canvas to draw your signature with your mouse or touch screen, or upload a pre-made signature image in PNG or JPEG format.
Choose the right page
Select which page of the PDF you want to sign. By default, the last page is selected, but you can sign any page.
Position precisely
Adjust the X and Y coordinates to place your signature exactly where you want it on the page. The width control scales the signature size.
Privacy first
All processing happens in your browser. Your PDF is never uploaded to any server, keeping your documents completely private.
How to sign a PDF online
Signing a PDF document is essential for contracts, agreements, forms, and any document that requires a handwritten or digital signature. Our free PDF signing tool lets you add your signature to any PDF directly in your browser, without uploading to a server.
You can draw your signature using your mouse or touchscreen on the interactive canvas, or upload a pre-made signature image in PNG or JPEG format. The signature is then embedded onto your chosen PDF page at the exact position you specify.
All processing happens locally in your browser using pdf-lib, a powerful JavaScript PDF library. Your PDF files are never uploaded to any server, ensuring complete privacy and security for your sensitive documents.
Frequently asked questions
How do I sign a PDF?
Upload your PDF, then either draw your signature on the canvas or upload a signature image. Choose which page to sign, adjust the position, and click Sign PDF.
What signature formats are supported?
You can draw your signature using the mouse or touch screen on the canvas, or upload a pre-made signature as a PNG or JPEG image.
Which page will the signature appear on?
You can choose any page of the PDF to sign. By default, the last page is selected. Use the page selector to choose a different page.
Can I adjust the signature position?
Yes. Use the X and Y coordinate inputs to position the signature precisely. The width input controls the signature size.
Is my PDF uploaded to a server?
No. All processing happens locally in your browser using pdf-lib. Your files never leave your device.