Sign PDFs Securely in Your Browser — No Uploads, No Cloud
Add signatures to PDF documents directly in your browser. No uploads, no accounts, no server processing. Your file stays on your device from start to finish.
Zero Server Uploads
Your PDF never leaves your device. Everything runs locally in your browser for maximum privacy and speed.
Accurate Signature Placement
Place signatures precisely on any page. Centrigon automatically aligns your signature to the correct PDF position.
Save Signatures in Your Browser
Save your signature locally in your browser for faster reuse across documents.
How to use Centrigon Pro
Unlike traditional legacy cloud systems, Centrigon follows three modern local principles to sign files:
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1
Load Your PDF
Our loader parses your PDF's internal page structures through browser sandbox memory.
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2
Draw or Type a Mark
Render clean high-density vector paths on our responsive capture canvas. Save to localStorage with one-click permission settings.
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3
Download Instantly
Scale, reposition, and drag signature layers across page frames. PDF-Lib compiles structural nodes instantly for standard download.
Frequently Asked Questions
Are PDF signatures made with Centrigon legally valid?
Yes. Digital and electronic signatures created locally are fully legal and compliant under the United States ESIGN Act and the European Union eIDAS regulations.
Do you store my PDF or signature?
No. Centrigon does not upload, store, or transmit your files. Everything runs locally inside your browser.
Private by Default
Your PDF never leaves your device. Documents are processed directly in your browser.
Instant Processing
No waiting for uploads or remote servers. Open, sign, and download in seconds.
Reusable Signatures
Save signatures locally in your browser and reuse them whenever you need them.
Privacy at a Glance
How your documents and signatures are handled when using Centrigon Sign PDF.
| Account Required | No |
| PDF Sent to a Server | No |
| PDF Stored by Centrigon | No |
| Signature Stored by Centrigon | No |
| Optional Local Signature Saving | Yes, in your browser only |
| Works Entirely in Browser | Yes |
| Download Signed PDF | Instant |