METHODHow the result is produced
Practical example
2400×1600 → 1200×800
Method
The browser draws the selected image area to a canvas and re-encodes it using the chosen size, format and quality.
Assumptions and limits
Re-encoding can remove metadata; visible quality depends strongly on the source.
Sources
MDN Canvas API
Last reviewed: August 2026Image Resizer
Change image width and height up to 10,000 pixels. An aspect lock preserves the original ratio while format and quality remain selectable.
Enter the required values or content, adjust the options and then review the detailed result.
FAQFrequently asked questions
What can I do with Image Resizer?
Change image width and height up to 10,000 pixels. An aspect lock preserves the original ratio while format and quality remain selectable.
How do I use Image Resizer?
Enter the required values or content, adjust the options and then review the detailed result.
Are my data uploaded?
No. Inputs and files for this tool are processed locally in your browser.
Is this tool free?
Yes. Every feature is free and requires no registration.
Does it work on mobile?
Yes. The interface is optimized for iPhone, Android, tablets and desktop computers.