Image Resizer
Resize images by pixels or percentage in your browser. Lock the aspect ratio, batch up to 20 files, and export exact dimensions.
Drop images here, or choose files. JPG, PNG or WebP, up to 20 files.
Processing happens in your browser. Images are not uploaded to any server. Changing settings or clearing the selection removes the previous download links.
Resize an image to the width and height a form or layout requires, or scale it by a percentage. Images are decoded, resized and encoded in your browser. They are not sent to a resizing service, and no history of your files is kept. Clear removes the current selection and any generated results.
Pixel mode sets an exact width and height. Percentage mode multiplies the original dimensions by a chosen factor. Keep aspect ratio is enabled by default: when you edit one side, the other is recalculated so the image is not stretched. Turning it off lets the width and height change independently, which distorts the image.
Reducing dimensions usually looks acceptable, but it still resamples pixels and can soften fine detail. Enlarging does not add detail that was not captured; the result is interpolated and may look blurry. This tool does not claim to upscale or restore image quality. Compare the preview with your original before replacing a file.
Up to 20 files can be processed in one batch. Each file must be a JPG, PNG or WebP image no larger than 20 MiB, with decoded dimensions no greater than 8,192 pixels per edge and 24 megapixels in total. Files are processed one at a time to keep memory use predictable, so a large batch takes longer than a single image.
How it works
- Choose one or more images. Drop or select up to 20 JPG, PNG or WebP files. The first image fills in the current width and height so you can see the starting point.
- Set the new dimensions. Enter a width and height in pixels, choose a percentage, or pick a common ratio such as 16:9 or 1:1. Keep aspect ratio recalculates the other side as you type.
- Resize and download. Choose an output format, then resize. Each result shows the original and new dimensions, the file size before and after, and a separate download link. Changing settings clears previous results.
Frequently asked questions
Does resizing reduce image quality?
Making an image smaller resamples its pixels, which can soften fine detail even though the result usually looks close to the original. Making it larger interpolates new pixels and cannot add detail that was never captured. Inspect the preview and keep your original file.
What is the difference between resizing and compressing?
Resizing changes pixel dimensions. Compressing reduces file size, usually by lowering encoding quality while keeping the same dimensions. Use the Image Compressor or Compress Image to Size tools when a file is too large rather than too wide.
Why does my image look stretched?
Keep aspect ratio was probably turned off, or the entered width and height do not match the original proportions. Turn it back on and edit only one side, or use a ratio preset. The tool applies the ratio from the original width.
What happens to transparent areas in a JPG?
JPG does not support transparency. When a PNG or WebP image is exported as JPG, transparent areas are filled with white before encoding. Choose PNG or WebP if you need to keep the alpha channel.
Are my images uploaded?
No. Files are read and processed in your browser after the page loads. A reload may need a network connection, and a file is saved only when you choose a download link. Clearing the selection discards results but does not affect the original file on your device.