Our free community tools have served over 1.5M users worldwide
Sign PDFs Online for Free
100% free, no watermarks, no limitations, no sign‑up required, and your data never leaves your browser.
Drag and drop your PDF files or click to Select
Your files never leave your device
Why is browser-based PDF signing safer?
Unlike most online PDF signing tools that upload files to cloud servers, this tool keeps your PDFs on your device and processes them locally, making signing faster, private, and secure.
How to sign PDFs online?
Add your PDF, place the signature field, add your signature, and download it instantly without affecting quality or formatting.
Add your PDF
Drag and drop your PDF files, or click to select one or more PDFs from your device.
Sign document in seconds
Place the signature field, then draw, type, or upload your signature and customize it as needed.
Download signed PDF
Download your signed PDF instantly with the original quality preserved.
How it works
This short video shows how easy it is to use our free online tool.
Why choose our sign PDF tool?
Sign PDF files in seconds using a free, secure tool with no registration or limits.
Your files stay private
All signing happens securely in your browser. We never upload, store, or access your files.
Works on any device
Use it on Windows, Mac, Linux, iPhone, or Android. No app or software installation needed.
Supports large PDFs
Large and multi‑page PDFs are supported, and performance depends on your device, browser, and file size.
Why free?
We offer this tool to help individuals and businesses sign PDFs quickly and securely. It’s our way of introducing BoldSign, our full-featured eSignature solution trusted by 100,000+ organizations.
Free tools built for the community
BoldSign offers free tools as a contribution to society. The tools run entirely in the browser and support personal and commercial use, with no watermarks, limits, or hidden costs.
Explore more articles on this topic
Discover the latest articles, updates, and helpful insights related to this topic.
-
August 14, 2025
Add Watermarks to PDFs Online: Free and Easy PDF Editing Tool
-
April 28, 2025
Introducing the BoldSign’s Free PDF Merge Tool
Frequently asked questions
Is it free to sign PDF files online?
Yes. BoldSign’s Sign PDF tool is completely free, with no hidden fees or limits.
Do I need an account to sign a PDF online?
No. You can sign PDFs without creating an account.
Is there a limit to the number of files I can sign?
There’s no strict limit. For best performance, we recommend signing up to 50 files per download.
How secure is my data when I upload files to sign?
Your files are processed in your browser and are not stored or shared.
Is it safe to use an online PDF signer for sensitive files?
Yes. This tool processes your PDF directly in your browser, so your file is not uploaded to BoldSign servers. This helps keep sensitive files private, while allowing you to sign and download them instantly.
What if I need to sign large PDF files?
You can sign large and multi‑page PDFs while preserving quality.
Does signing affect PDF quality?
No. Signing does not affect the original quality or formatting of your PDF.
Can I sign PDF files on my mobile using an online tool?
Yes. With BoldSign’s free PDF signer, you can sign PDFs on your mobile using any modern browser with no installation required.