Searching for a way to sign a PDF online for free — without downloading software, creating an account, or uploading your file to a stranger's server? You're in the right place.
Signpdf is a completely browser-based PDF signer. Your file never leaves your device. Everything happens locally using PDF.js and pdf-lib — the same technology used by Mozilla.
How to Sign a PDF Online Free (Step by Step)
- 1Go to signpdf.top/sign
- 2Click the upload zone or drag and drop your PDF
- 3Click 'Add Signature' — draw with your mouse, type your name, or upload a signature image
- 4Drag the signature to the correct position on the page
- 5Click 'Download PDF' to save the signed document
Free to use for your first 3 documents per day. No account required. Your PDF is never uploaded to any server.
Why Use a Browser-Based PDF Signer?
- No software to download or install
- Works on Windows, Mac, Linux, iPhone, and Android
- Your documents stay private — zero server uploads
- Completely free for occasional use
- No account, no email, no credit card
Can I Sign PDFs for Free on Mobile?
Yes. Open signpdf.top in Safari (iPhone) or Chrome (Android) and the full editor works on touchscreen. Draw your signature with your finger, position it, and download. No app required.
Is a Free Online PDF Signature Legally Valid?
Electronic signatures are legally recognized under the U.S. ESIGN Act (2000) and the EU eIDAS regulation. A drawn or typed signature applied via a browser-based tool is legally binding for contracts, NDAs, and most business documents.
Sign your PDF online free right now — no account, no upload, no waiting.
Sign PDF Free →