Resize Image
Change image dimensions with aspect-ratio lock, percentage scaling, and format options — processed on your device.
Processed on your device. Your files are not uploaded.
Resize image workspace
No image selected yet.
How to use
- Choose a JPG, PNG or WebP image.
- Set width and height, or use the percentage control.
- Keep Lock aspect ratio enabled unless you need a free resize.
- Select Resize image and download the result.
About this tool
Resize Image uses high-quality canvas smoothing. Upscaling is allowed only when you explicitly enter larger dimensions. Extreme sizes are blocked to avoid browser crashes.
Frequently asked questions
- Are my images uploaded?
- No. Resizing runs in your browser. Files stay on your device and are not uploaded to Docomium.
- Is there a size limit?
- Each side is limited to 8,192 pixels, and total output pixels are capped to protect browser memory.
- Does resizing keep metadata?
- Re-encoding through the canvas API typically strips most metadata. Treat that as expected for privacy and compatibility.