Resize Images Without Uploading — Free Online Image Resizer
Resize images by setting a custom width — height scales proportionally. JPEG, PNG, and WebP supported. Everything runs in your browser: no upload, no account, no logs.
How to use this tool
- Pick the JPEG, PNG, or WebP you want to resize.
- Enter the target width in pixels — height scales proportionally.
- Download the resized image.
Drop an image here
Processed in your browser. How it works
About Resize Image
Resizing an image changes its pixel dimensions — how many pixels wide and tall it is — which is different from compression, which changes how those pixels are stored. This tool resamples your image to a target width you specify, and scales the height proportionally so the picture never looks stretched or squashed. Internally it draws the source onto a canvas at the new dimensions, letting the browser interpolate the pixels, then exports the result. Because file size grows roughly with the pixel count, cutting the width in half can shrink the file to around a quarter of its original size, which makes resizing one of the most effective ways to make an image lighter.
Resizing down — making an image smaller — is the safe and common case: a 6000-pixel-wide phone photo is far larger than any web page, email, or social post needs, and scaling it to 1280 or 1920 pixels keeps it crisp while slashing the file size. Resizing up — enlarging beyond the original dimensions — cannot invent detail that was never captured, so the result looks softer or blocky; this tool will do it if you ask, but for genuine enlargement a dedicated upscaler gives better results. The output format follows the input: PNG stays PNG (lossless), while JPEG and WebP are re-encoded at 92% quality.
Typical uses are fitting an image to a forum or CMS upload limit, preparing consistent thumbnail or hero-image widths for a website, shrinking a photo to attach to an email, or hitting an exact pixel width required by a profile picture or banner. A practical tip: decide your width based on where the image will be displayed — most website content columns are under 1200 pixels wide, so resizing to that range often produces a much smaller file with no visible difference on screen.
The tool resizes by width with proportional height, so it does not crop or change the aspect ratio — if you need a specific shape such as a square avatar, crop the image first and then resize. It handles one image at a time. All resampling happens on a canvas in your browser, so the image is processed locally and never uploaded to a server, keeping it private on your own device.
Frequently Asked Questions
- Does resizing keep the original proportions?
- Yes. You enter a target width in pixels and the height is calculated automatically to preserve the original aspect ratio, so the image is never stretched or distorted. The tool resizes by width only; it does not crop or change the shape of the image.
- Can I make an image larger than the original?
- You can enter a width bigger than the source, but enlarging cannot add detail that was never captured, so the result will look softer or blocky. Resizing is best used to make images smaller. For genuine enlargement, a dedicated image upscaler produces noticeably better results.
- What's the difference between resizing and compressing?
- Resizing changes the pixel dimensions — how many pixels wide and tall the image is — while compression changes how efficiently those pixels are stored at the same dimensions. Because file size scales with pixel count, resizing down is often the more powerful way to reduce file size, and you can combine it with compression for the smallest result.
- Which formats are supported?
- JPEG, PNG, and WebP. The output format matches the input: PNG output stays lossless, while JPEG and WebP are re-encoded at 92% quality, which is visually indistinguishable from the original for typical images.
- What width should I choose?
- Base it on where the image will be shown. Most website content areas are under 1200 pixels wide, so 1280 or 1920 pixels is plenty for full-width web use, while thumbnails need only a few hundred pixels. Choosing a width that matches the display size avoids shipping far more pixels than anyone will ever see.
- Can I set an exact height or crop to a shape?
- This tool resizes by width with the height following proportionally, so it will not crop or force a specific height. If you need a particular shape — for example a square profile picture — crop the image to that shape first, then resize the cropped result to your target width.
- Can I resize multiple images at once?
- It processes one image at a time: drop the file, enter the width, and download the resized result. For several images, repeat the steps for each. Each resize is independent.
- Is my image uploaded to resize it?
- No. The resampling is done on a canvas inside your browser, so the image is processed entirely on your device and never sent to a server.
Embed this tool on your site
Free. One line of HTML — the tool runs in your visitor's browser, no data sent to anyone.
<iframe src="https://brevio.pro/embed/image-resize" width="100%" height="600" loading="lazy" style="border:1px solid #e5e5e5;border-radius:8px" title="Resize Image — brevio"></iframe> <p style="font:12px/1.4 sans-serif"><a href="https://brevio.pro/tools/image-resize">Resize Image</a> by <a href="https://brevio.pro">brevio</a></p>