How to Create a Digital Signature Online Free
A digital signature lets you sign documents without printing, scanning, or paying for Adobe Acrobat. You can draw your handwritten signature on screen, type your name in a script font, or upload a photo of your signature — then download it as a transparent PNG or embed it directly into a PDF. This guide covers all three methods using free browser-based tools with no account required.
Quick Answer
A digital signature lets you sign documents without printing, scanning, or paying for Adobe Acrobat. You can draw your handwritten signature on screen, type your name in a script font, or upload a photo of your signature — then download it as a transparent PNG or embed it directly into a PDF.
Try it now — free, no signup
Your images stay on your device. Nothing is uploaded to any server.
Step-by-Step Guide
5 steps · takes under 1 minute
Open the Sign PDF tool
Go to the Sign PDF tool — it runs entirely in your browser. No account, no Adobe, no downloads needed.
Upload your PDF
Drag and drop your PDF onto the upload zone or click to browse. The PDF is rendered in your browser and never sent to a server.
Draw your signature
Click 'Add Signature', then draw your handwritten signature using your mouse, trackpad, or touchscreen. You can also type your name in a script font.
Place the signature on the document
Drag the signature to the correct position on the page. Resize it by dragging the corners.
Download the signed PDF
Click Download PDF. Your signature is permanently embedded in the PDF and the file saves to your device instantly.
100% Private — Zero Uploads
ImgToolkit runs entirely in your browser using the Canvas API. Your images are never sent to a server, never stored in the cloud, and never seen by anyone else. This makes it safe for sensitive documents, client work, medical imagery, and confidential screenshots.
Pro tip
Use 75–85% quality for web images — you get 60–80% smaller files with no visible difference at normal screen sizes.
Format & File Size Comparison
Same 1080×1080px photo processed four ways
| Format | Quality | File Size | Notes |
|---|---|---|---|
| PNG (original) | Perfect | 4.2 MB | No compression — too large for web |
| Compressed PNG | Visually identical | 1.1 MB | −74% — transparency preserved |
| JPG (85% quality) | Excellent | 310 KB | −93% · Best for photos |
| WebP (85%)BEST | Excellent | 205 KB | −95% · Recommended for web |
Based on a 1080×1080px photo. Results vary by image content and complexity.
Related Free Tools
All tools run in your browser — no account or upload needed
Frequently Asked Questions
5 questions answered