Is SagePDF safe to use?

Yes. All processing happens in your browser. Your files never leave your device or get uploaded to any server.

Do files upload to servers?

No. Everything runs client-side. We never see, store, or transmit your documents.

Yes. No signup, no hidden limits, no payment. Use it as often as you need.

Can I use this for large PDFs?

Yes. Very large files may take longer depending on your device, but there are no artificial limits.

Does this work on mobile?

Yes. SagePDF runs in your browser, so it works on phones, tablets, and desktops.

Digital Signature PDF Online Free

Add a cryptographic digital signature to your PDF using X.509 certificates. Supports PKCS#12 (.pfx, .p12) and PEM formats. Your private key never leaves your browser. All processing happens in your browser. No uploads, no signup—your files never leave your device.

This tool is coming soon.

We’re building more PDF tools that run entirely in your browser. Check back later or try Merge PDF above.

How to use

1
Add files
Drag and drop your files or click to browse. Your files stay in your browser and never leave your device.
2
Process
Run the tool. All processing happens locally in your browser—no uploads to our servers.
3
Download
Download your result. No account required.

FAQ

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