Resize images without uploading them: Select one or many images, set the target size, choose an output format, and download resized files directly from your browser.
What is an Image Resizer?
An image resizer changes the pixel dimensions of an image. It is useful when photos are too large for websites, forms, email attachments, CMS uploads, or client handoff folders.
This online image resizer runs locally in the browser. It decodes the selected image, draws the resized version to a canvas, and exports a new image file.
Resize Options
You can resize by width, height, percentage, or maximum dimension. Keep aspect ratio is enabled by default so images do not look stretched.
When you choose original format, JPG, PNG, and WebP keep the same output format. GIF first frames and BMP files export as PNG because browser canvas export support is limited. You can also convert to JPG, PNG, or WebP, with a quality slider for JPG and WebP.
How to Use This Image Resizer
- Drop images into the upload area or choose files from your device.
- Select the resize mode and target value.
- Keep aspect ratio enabled unless you intentionally want to stretch the image.
- Choose the output format, file name option, and quality.
- Download a single resized image or a ZIP when multiple images are selected.
Supported Image Types
The tool supports common formats that your browser can decode, including JPG, PNG, WebP, GIF first frame, and BMP in supported browsers. HEIC, HEIF, RAW camera files, and animated GIF/WebP preservation are not included in this version.
Privacy
Images are processed in your browser and do not need to be uploaded to a runtime server. Very large images or very large batches may still be limited by browser memory.
Technical Details
The tool uses browser image decoding, the Canvas 2D API, and canvas.toBlob() to export resized files. Canvas export may remove metadata such as EXIF data.