Resize Image
Resize images to exact dimensions or percentage. Maintain aspect ratio. Free and private.
Options
使用方法
Upload your image — JPG, PNG, WebP, or other formats
Enter your desired width and height in pixels
Download your resized image instantly
常见问题
Can I maintain the aspect ratio?
Yes. The "Maintain aspect ratio" option is enabled by default. When you change the width, the height adjusts automatically, and vice versa.
What is the maximum size I can resize to?
You can resize up to 10,000 x 10,000 pixels. For very large sizes, processing may take a few seconds depending on your device.
Is my image uploaded to a server?
No. Resizing happens entirely in your browser using the Canvas API. Your image never leaves your device.
Does resizing reduce image quality?
Upscaling can reduce sharpness since new pixels are interpolated. Downscaling generally looks fine. Use the "Maximum" output quality setting to preserve the most detail.
Can I resize images on my phone?
Yes. OneConvertly works in any modern mobile browser including Chrome on Android and Safari on iPhone. No app required.
Can I resize by percentage instead of pixels?
Yes. Switch to "Percentage" mode and enter a scale factor (e.g. 50% to halve, 200% to double). The aspect ratio is preserved automatically.
Is this tool free to use?
Yes, completely free. No signup, no watermarks, no daily limits.