An image resizer changes the pixel dimensions of a picture — making it larger or smaller — without leaving your device. Our free online image resizer runs entirely in your browser using the HTML5 Canvas API, so your photos are never uploaded to a server. Whether you need a square 1080×1080 post for Instagram, a 1500×1500 product shot for Amazon, or a tiny 150×150 thumbnail, you can set the exact size in seconds.
Resizing takes less than a minute:
Need to shrink a large camera photo before emailing it, or fit a hero banner into a website template? Pair this tool with our Image Compressor to squeeze the bytes even further after resizing.
Different platforms expect different dimensions. Using the wrong size leads to cropping, letterboxing, or blurry results. Common targets our users resize to:
Before you publish, you may also want to crop unwanted edges or remove a background so the resized picture looks clean.
Resizing changes how many pixels an image has (its physical dimensions). Compression reduces the file size without changing dimensions. A 4000×3000 photo dropped to 1200×900 has far fewer pixels and a much smaller file. For the smallest result, resize to the size you actually need and then compress. Our JPG/PNG/WebP Converter can also switch formats in one step.
Every resize happens on your own device through the Canvas API. Your image is never sent to a server, which makes this tool safe for confidential design assets, client mockups, and proprietary product photography. When you are done, nothing remains on our side.
Desktop apps such as Photoshop or GIMP offer deeper control, but they cost money or time to learn. A free in-browser resizer is ideal for the everyday task of hitting a target dimension quickly — no install, no account, and results in seconds. If you also work with vector artwork, our Image to SVG Converter and PNG to SVG Converter turn raster art into scalable vectors.
Upload an image, choose a target size in pixels or a percentage, then click Resize. The browser redraws the picture on an HTML5 Canvas at the new dimensions and lets you download the result. Nothing is uploaded.
No. All resizing is performed locally in your browser using the Canvas API. Your images never leave your device and are not stored anywhere.
You can open PNG, JPEG, GIF, WebP, and BMP. The resized file exports as PNG, JPEG, or WebP, depending on the format you select.
Yes. Switch to percentage mode and enter a value such as 50% to halve both width and height, or 200% to double them, in a single step.
Enable the aspect-ratio lock. When it is on, editing the width automatically calculates the matching height (and vice versa) so the image is not stretched.
Usually. Fewer pixels means less data, so a smaller image is typically a smaller file. For the biggest savings, also lower the quality or export to JPEG/WebP.
You can enter larger dimensions, but upscaling does not add detail — it stretches existing pixels and the result looks soft. Keep upscale factors small for the best outcome.
Common sizes include Instagram 1080x1080, Facebook 1200x628, LinkedIn banner 1584x396, and Twitter/X header 1500x500. Enter these exact dimensions in pixel mode.
Resizing changes pixel dimensions; compression reduces file size without changing dimensions. For the smallest file, resize first, then compress.
Yes. The tool is completely free, runs in your browser, requires no signup, and adds no watermark to your downloaded image.
Yes. Upload a PNG with transparency and export it as PNG again to keep the transparent background intact.
Yes. Because it runs in the browser, it works on desktop, Android, iPhone, and iPad with no app to install.
