Canvas Extender
Add padding around any image to extend its canvas. Choose transparent padding (perfect for product photos) or a solid fill. Adjust each side independently or link them for uniform padding. Ideal for meeting platform dimension requirements or creating breathing room around subjects.
Drag to compare
Add transparent or colored padding to extend image canvas — control each side independently
How it works
- Drop any image and choose a target aspect ratio (1:1, 4:3, 16:9, 9:16, 4:5, 21:9, or custom)
- The tool pads the shorter dimension with your chosen background colour to reach the target ratio
- Download the extended image — original content is centred, padding fills the edges
Frequently asked questions
Does the tool crop the image?
No. Canvas extension adds padding to the outside — nothing is cropped from the original. The original image is centred in the new canvas.
Can I choose the padding colour?
Yes. A colour picker lets you choose any background colour for the padding. White and black are preset shortcuts; transparent output is available for PNG.
What is this used for?
Common uses: squaring a portrait for Instagram (1:1), adding pillarbox bars for YouTube thumbnails that need a specific ratio, or preparing product images for e-commerce platforms that require a specific canvas size.
Related tools
Why it's different
Canvas padding applied entirely in your browser — transparent or solid fill, per-side control. No upload, no server, your images stay private.
100% Private
Everything runs on your device using in-browser AI. Nothing is transmitted to any server — not the file, not metadata, not filenames.
True Alpha Channel
We export straight (non-premultiplied) alpha so transparent PNGs open with a real checkerboard in Photoshop and Figma — no black halos.
Free Forever
No paywall, no watermark, no premium tier. The full-quality AI is free, supported by non-intrusive ads.
Works Offline
Once loaded, the app and AI models cache locally. Process files without an internet connection. Installable as a desktop or mobile app.
Ready to try it?
Free, private, no signup.
Extend canvas →