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Image Resizer

Resize JPG, PNG and WebP images by width, height or percentage. Lock the aspect ratio, preview live, and download — all in your browser.

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Drag & Drop an Image Here
Supports JPG, PNG, WebP · Single file

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Frequently Asked Questions
No. All resizing runs entirely in your browser using the HTML canvas. Your images never leave your device, so it's completely private and works even offline once the page has loaded.
You can resize JPG, PNG and WebP images. The output format automatically matches the format of the image you uploaded, so a PNG stays a PNG and a JPG stays a JPG.
When aspect ratio is locked, changing the width automatically updates the height (and vice versa) so your image keeps its original proportions and doesn't look stretched or squashed.
Yes. Switch to percentage mode and enter a value like 50 to scale the image to half its original size, or 200 to double it. Proportions are always kept in percentage mode.
Usually yes. Reducing the pixel dimensions of an image typically produces a smaller file. The tool shows both the original and the new file size so you can compare before downloading.

Resize Any Image in Seconds — Privately

The Toolixa Image Resizer is a fast, free way to change the dimensions of your photos and graphics without installing software or uploading anything to a server. Whether you need a smaller avatar, a banner that fits a specific slot, or a batch of product photos scaled to identical widths, this tool gives you precise pixel control with a live preview so you always know exactly what you'll get.

How to resize an image

Drag a JPG, PNG or WebP file onto the drop zone or click Browse to select it. Once loaded, you'll see the original dimensions and file size. Choose whether to resize by exact dimensions (enter a width and height in pixels) or by percentage (scale up or down relative to the original). Keep "Lock aspect ratio" enabled to preserve proportions automatically — as you type a new width, the height updates to match. When the preview looks right, click Download to save the resized image.

Why aspect ratio matters

Every image has a natural width-to-height ratio. If you change one dimension without adjusting the other, the picture becomes stretched or squashed and looks unprofessional. Locking the aspect ratio ensures the resizer always scales both dimensions together. Unlock it only when you deliberately need a non-proportional result, such as fitting an image into a fixed frame where distortion is acceptable.

Common use cases

Resizing is one of the most common image edits. Social media platforms recommend specific pixel dimensions for profile pictures, posts and cover images. Websites load faster when images are sized to the space they occupy rather than being scaled down by the browser. Email attachments and messaging apps often have size limits that a quick resize can help you meet. Print projects, presentations and document uploads frequently require exact dimensions too.

Quality and file size

Because resizing changes the number of pixels in an image, downscaling almost always reduces the resulting file size — helpful for faster page loads and smaller uploads. The tool renders your image onto a canvas at the target dimensions and re-encodes it in the original format. For the smallest possible files after resizing, try pairing this tool with the Image Compressor to fine-tune quality. Everything runs locally in your browser, so your files stay private and the process is instant even for large images.