How to Add an Image to an Existing PDF Online Free
Whether you need to add your company logo to a PDF report, insert a photo into a form, or place a signature on a document, adding an image to an existing PDF is a common task. Adobe Acrobat charges for this feature, but you can do it for free directly in your browser with ImgToolkit's Sign PDF tool — which supports placing any image onto a PDF, not just signatures.
Quick Answer
Whether you need to add your company logo to a PDF report, insert a photo into a form, or place a signature on a document, adding an image to an existing PDF is a common task. Adobe Acrobat charges for this feature, but you can do it for free directly in your browser with ImgToolkit's Sign PDF tool — which supports placing any image onto a PDF, not just signatures.
Try it now — free, no signup
Your images stay on your device. Nothing is uploaded to any server.
Step-by-Step Guide
6 steps · takes under 1 minute
Prepare your image
Make sure your image is a PNG (with transparent background if needed) or JPG. Compress it first if it's large.
Open the Sign PDF tool
Navigate to the Sign PDF tool on ImgToolkit.
Upload your PDF
Drop in the PDF you want to add an image to.
Upload your image as the 'signature'
Use the signature upload feature to add your PNG or JPG image to the PDF canvas.
Position and resize
Drag and resize the image to the correct position on the PDF page.
Download the updated PDF
Click Download. Your PDF now includes the added 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
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
3 questions answered