Resize Image
Change image dimensions instantly in your browser — by pixel size or percentage. Supports JPG, PNG, and WebP. Nothing is uploaded to any server.
Resize Result
FAQ
Is my image uploaded to a server?
No. Everything runs locally in your browser using the HTML5 Canvas API. Your image never leaves your device at any point.
What is "Lock aspect ratio"?
When enabled, changing the width will automatically recalculate the height to maintain the original proportions of the image. This prevents stretching or distortion. You can disable it to set a custom width and height independently.
What does Percentage mode do?
Instead of specifying exact pixel dimensions, you scale the image proportionally. For example, 50% reduces both width and height by half. 200% doubles the image size. This mode always preserves the aspect ratio.
Will resizing affect image quality?
Scaling down generally produces sharp results. Scaling up (upscaling) will reduce sharpness since pixel data is being stretched — this is a browser-native limitation. For professional upscaling, dedicated tools like AI upscalers are recommended.
Which output formats are supported?
You can save the resized image as JPEG (smallest file, no transparency), PNG (lossless, supports transparency), or WebP (modern format, excellent compression with quality). The format is independent of the input file format.
Is there a maximum image size I can resize?
There's no hard limit, but very large images (over 20 megapixels) may be slow to process or may hit browser memory limits. For best results, try to keep source images under 20MB.