How it works

1. 1

   Upload your PDF file — it never leaves your device.

2. 2

   Add your signature by drawing, typing your name, or uploading an image.

3. 3

   Drag the signature to the right spot, then click Export to download your signed PDF.

Why choose FlowTools

• 100% client-side processing — your files never touch a server.
• No sign-up required. No daily limits. No paywalls.
• Lightning fast rendering with instant downloads.

Frequently Asked Questions

Is it safe to sign a PDF in my browser?

Absolutely. FlowTools processes everything locally in your browser. Your PDF never gets uploaded to any server.

Can I use my own signature image?

Yes. You can upload a transparent PNG of your signature, or draw one using our built-in signature pad.

Will the signature be permanent on the PDF?

Yes. The exported PDF has your overlays flattened directly into the document.

Is this really free?

Yes. FlowTools is funded by non-intrusive display ads. No hidden fees or premium tiers.