Sign PDF
Use Sign PDF free online. Drag your file in, get the result back, and keep everything on your own device.
Sign a PDF
Drop your files to try StandardsPDF. This tool is available in the full workspace.
Runs in your browser – nothing to install
Files auto-deleted from our servers within 60 minutes
Free to use with no watermark or signup
Works on desktop, tablet and phone
How it works
Three simple steps
Drag your file into the box above
Let StandardsPDF do the work in your browser
Save the finished file
Private by default
Files are encrypted in transit and deleted within 60 minutes.
Fast
Most jobs finish in under 10 seconds. No queueing.
No signup on free tier
5 documents per day, no credit card required.
FAQ
Frequently asked questions
How do I sign pdf online?+
Upload your file above, run Sign PDF, and download the result. It happens in your browser – no software to install and no account needed.
Is the Sign PDF tool free?+
Yes. Sign PDF is free on the StandardsPDF free tier, with no watermark and no signup. Pro raises the file-size and daily limits.
Are my files private when I sign pdf?+
Yes. Files you sign pdf are processed in isolated workers, never shared, and permanently deleted from our servers within 60 minutes.
Do I need an account to sign pdf?+
No account is needed to sign pdf on the free tier – up to 5 documents per day, no credit card required.
What is the maximum file size for Sign PDF?+
You can sign pdf files up to 100 MB on the free tier and 2 GB on Pro. Larger files can be split first or handled on the Pro plan.
Can I sign pdf on my phone?+
Yes – the Sign PDF tool is fully responsive and works in modern browsers on iOS, Android and iPadOS.
Will I lose any quality when I sign pdf?+
No. Sign PDF preserves the structure and quality of your original file wherever the output format allows.