Free Tool 2 min read

Create a Digital Signature Online — Free

A digital signature lets you sign documents electronically without printing, scanning, or faxing. ImgToolkit's signature maker lets you draw your real handwritten signature on screen — with a mouse on desktop or your finger on mobile — and download it as a transparent PNG. Drop it into any document, PDF, or image. Free, instant, no account needed.

Files never leave your device ⚡ Instant browser processing 🆓 100% free — no account 🚫 No watermark on output

By ImgToolkit Team · Updated May 2026 · 2 min read · Processed in your browser

PNGJPGWebPGIF

Quick Answer

Try it now — free, no signup

Your images stay on your device. Nothing is uploaded to any server.

Create Signature Free

Step-by-Step Guide

4 steps · takes under 1 minute

Open the Signature Maker

Navigate to the Signature Maker tool. Works on desktop (mouse) and mobile (finger or stylus).

Draw your signature

Sign naturally on the canvas. Use smooth, continuous strokes for the most realistic result.

Adjust pen thickness and color

Black or dark blue are standard for signatures. Adjust pen width to match how you sign with a real pen.

Download as transparent PNG

Download your signature as a PNG with a transparent background. It's ready to overlay on any document or image.

🔒

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

All processing happens in your browser using WebAssembly and the Canvas API. No files are sent to any server — your images stay completely private.

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

Image Compressor

Shrink PNG, JPG & WebP files

Background Remover

AI-powered, keeps transparency

Image Resizer

Resize to exact pixels or %

Crop Image

Drag-and-drop crop tool

PNG → JPG

Convert any format to JPG

Frequently Asked Questions

3 questions answered

Is a drawn digital signature legally binding?

In most countries, electronic signatures are legally valid for most documents — especially in the US (ESIGN Act), EU (eIDAS), and UK (Electronic Communications Act). A drawn signature image is an 'electronic signature' under these laws. However, for highly sensitive documents (wills, property deeds in some jurisdictions), wet ink or a certified e-signature service may be required.

How do I add my signature to a PDF?

Download your signature as a transparent PNG, then use ImgToolkit's Sign PDF tool to draw or upload your signature onto a PDF document. Alternatively, open the PDF in Adobe Acrobat, Preview (Mac), or a PDF editor and insert the PNG image.

Can I make my signature look more natural?

Sign slowly and deliberately on the canvas. Use a stylus on a tablet for the most natural result. If signing with a mouse, use smooth wrist movements rather than finger movements. You can always clear and retry until it looks right.

Ready to get started?

Free, instant — your files stay on your device. Always.

Create Signature Free

Signature Maker

Free · Browser-based · No account

Create Signature Free

Privacy First

Your images are processed entirely in your browser using WebAssembly. No files are ever uploaded to a server.

What's included

Freehand drawing with mouse or touch

Transparent PNG output

Adjustable pen color and thickness