Sign PDF Online Free
Add your signature to any PDF document in seconds — completely free, entirely in your browser. No file uploads, no account, no watermarks. Just open, sign, and download.
Drop your PDF here
or click to browse files
Upload a PDF to get started
How to Sign a PDF Online in 3 Steps
- Open your PDF — drag and drop your file onto the editor above, or click to browse. Your file stays on your device and is never uploaded to any server.
- Create your signature — draw it freehand with your mouse or finger, type your name and pick a handwriting font, or upload an existing signature image.
- Place, adjust & download — click anywhere on the page to place your signature, resize it as needed, then download the finished PDF with your signature permanently embedded.
Why Sign PDFs Online with SigPDF?
100% Browser-Based — No Uploads
SigPDF processes your documents entirely in your web browser using client-side JavaScript. Your PDF never leaves your device, making it one of the most private ways to sign documents online. There is nothing to install and no data is sent to external servers.
Truly Free, No Hidden Costs
Many online PDF signers advertise themselves as free but add watermarks, limit the number of signatures, or lock features behind a paywall. With SigPDF you can sign as many pages as you need without watermarks or branding on your documents.
Works on Every Device
Because SigPDF runs in the browser, it works on Windows, Mac, Linux, Chromebook, iPhone, iPad, and Android devices. There is no app to download and no software to keep updated.
Multiple Signature Methods
Draw a freehand signature with your mouse or touchscreen, type your name and choose from handwriting-style fonts, or upload a scanned signature image. You can also add text fields, dates, and photos to your PDF.