Sign PDF - Draw & Add Digital Signatures to PDF
Draw or upload a signature and burn it onto PDF document pages.
Processed 100% locally in your browser. Your signature and files never leave your device.
About Sign PDF - Draw & Add Digital Signatures to PDF
Overlays signature drawings or transparent PNG signature graphics onto PDF canvas coordinates.
What Can You Use This Tool For?
Students, legal professionals, administrative teams, and business owners use Add Signature to PDF to quickly manage, convert, and optimize sensitive PDF contracts, assignments, and reports with guaranteed local browser privacy.
How to Sign a PDF Document
1. Upload your PDF document.
2. Draw your signature on screen, type your name, or upload a transparent signature image.
3. Place and scale your signature on the designated signature line.
4. Download your signed PDF.
Usage Examples
Signing a Contract PDF
Document: Lease_Agreement.pdf Action: Draw electronic signature on Page 4 line Result: Signed Lease_Agreement.pdf
Frequently Asked Questions
Are my PDF documents uploaded to a remote server?
No. Unlike traditional PDF conversion sites, Numvax processes PDF documents entirely inside your web browser using WebAssembly and client-side JavaScript. Your confidential files never leave your device.
What is the maximum PDF file size supported?
Because processing occurs in your local browser memory, you can manipulate large multi-page PDF documents smoothly without server upload timeout errors.
Will the formatting and fonts of my PDF be preserved?
Yes, the tool utilizes precision document rendering engines to maintain original text layout, font structures, vector graphics, and embedded images.
Can I process password-protected PDF files?
If a PDF requires a password, unlock it using our Unlock PDF tool first before merging, editing, or splitting.
Is my drawn signature uploaded to a server?
No. Drawing and signature placement occur entirely client-side in your browser. Signature data is never stored.
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