Sign PDF - PDF Editor

Double Ape

Contains adsIn-app purchases

About this app

Sign PDF - PDF Editor is the fastest way to sign a PDF on your phone. Draw or type your signature, fill out forms, add text, and protect your documents — all in one simple app.

Whether you need to sign a contract, fill out a tax form, or add a password to a sensitive document, Sign PDF makes it effortless. No account required, no complicated setup. Just open your PDF and get it done.

✍️ SIGN PDFs INSTANTLY
Create your signature by drawing it with your finger or typing your name. Choose from multiple ink colors and stroke sizes for a natural, professional look. Save your signatures and reuse them across all your documents — no need to re-draw every time.

📝 FILL FORMS IN SECONDS
Easily fill out PDF forms with text fields, checkboxes, radio buttons, dropdowns, and more. Edit any form field directly on the document. Perfect for applications, tax forms, contracts, and any fillable PDF.

💬 ADD TEXT & ANNOTATIONS
Place text anywhere on a PDF page. Adjust font size and style to match the document. Add multiple signatures and text boxes on the same page — move, resize, rotate and duplicate them with simple gestures.

🔒 PROTECT WITH A PASSWORD
Encrypt your signed PDF with a password so only authorized recipients can open it. Open and edit password-protected PDFs too.

📜 ADD YOUR DIGITAL CERTIFICATE
Import your PKCS#12 certificate or pick one from your device to apply a cryptographic digital signature. Ideal for professionals who need legally binding e-signatures on contracts, NDAs, and official documents.

📤 SAVE, SHARE & PRINT
Save your signed PDF, share it via email, messaging apps, or cloud storage, and print it — all from one screen.

Sign PDF - PDF Editor is designed to be clean, fast, and easy to use. No bloat, no clutter — just a powerful PDF signer and form filler that gets the job done.

Download Sign PDF now and sign your first document in under a minute.