How can I add my signature to the document?

You have three options: you can draw your signature using your mouse or touchscreen, type your name using cursive fonts, or upload a PNG image of your actual signature.

Is it easy to sign documents on a mobile phone?

Yes, this tool is highly optimized for mobile devices. Using your finger on a smartphone touchscreen is actually the most natural way to draw a smooth, accurate signature.

Can I resize and move the signature once placed?

Absolutely. After dropping your signature onto the page, you can drag it to the exact signature line and use the corner handles to scale it perfectly to fit the space.

Sign PDF Documents Online - Free E-Signature Tool

Electronically sign PDF contracts, agreements, and forms online - no downloads required. Trusted by professionals worldwide to add legally-binding e-signatures to any PDF in seconds.

Upload PDF to sign

Sign PDF Documents Safely Online on Phone or Desktop

Sign contracts, invoices, agreements, and official paperwork on the go with PDFjin's completely responsive, mobile-friendly PDF signer. Traditional PDF signing tools force you to constantly zoom, pan, and crop on tiny smartphone screens, but our advanced signer automatically scales your document pages to fit your screen layout seamlessly. Draw a natural signature with your finger or stylus, or select a pre-saved signature, and place it exactly where you need it on the page in a single tap. PDFjin requires no login, subscription, or software downloads, giving you instant access to secure, legally-compliant digital signatures on any desktop or mobile device. All signed documents are processed through highly secure end-to-end encrypted connections and are permanently deleted from our servers post-download to protect your identity and data.

How to Sign a PDF Online - Step by Step

Upload Your PDF

Click or drag and drop your PDF file into the upload area to get started.

Open Signature Box

Click Create Signature to open the signing panel with three options.

Draw or Save Signature

Draw your signature with mouse or finger, type it, or upload an image.

Place and Download

Drag your signature to the correct position on the page, then click Done to download.

Why Sign PDFs with PDFjin?

Instant and FreeNo subscription needed - sign unlimited PDFs for free directly in your browser.

Bank-Level SecurityAll documents are encrypted and permanently deleted after download.

Mobile OptimizedPages auto-scale to fit any screen - sign with your finger on any smartphone.

Legally ValidElectronic signatures are compliant with e-signature laws worldwide.

Who Can Use the PDF Sign Tool?

Business ProfessionalsSign contracts, NDAs, and client agreements without printing a single page.

Students and AcademicsSign enrollment forms, scholarship applications, and permission slips instantly.

Real Estate AgentsGet leases and property agreements signed quickly from any location.

Healthcare WorkersSign patient consent forms and medical releases securely online.

FreelancersClose deals faster by signing project contracts on any device, anywhere.

Small BusinessesStreamline paperwork and eliminate the hassle of printing, scanning, and emailing.

Frequently Asked Questions

Read all FAQs about Sign Pdf →