Reduce image dimensions right in your browser

Drop a JPG, PNG or WebP file into the upload area, open the dimensions panel, then type a new width in pixels. The height follows automatically because the aspect ratio is locked. If you would rather think in percentages, pick a scale such as 50% instead. The preview shows the new pixel dimensions beside the new file size within about a second, and you download from there. No upload, no account, nothing to install.

Dimensions are the pixel width and height, like 1920 × 1080 px. File size is what the encoded file weighs on disk, in KB or MB. They move together but they are not the same thing. Halving the dimensions removes roughly three quarters of the pixels and usually shrinks the file dramatically, while compression lowers the file size without touching the dimensions at all. This tool controls both.

Match the size to where the image is displayed. A blog column that renders at 800px does not need a 4000px photo, and the extra pixels cost you nothing but bandwidth. Going below roughly twice the display width is where you start to see softness on retina screens. Downscale in one step rather than repeatedly, keep the aspect ratio locked, and export WebP at quality 80 to 85 for photos.

Yes. Switch the compression mode to Target size and choose 20KB, 50KB, 100KB, 200KB, 500KB or 1MB. The tool binary-searches the quality range for the highest quality that still fits your budget while keeping your dimensions, and only drops the resolution further if the target is otherwise unreachable. Export JPG or WebP for this. PNG is lossless, so a PNG can only reach a size target by losing pixels.

Drop in as many files as you like, set the width or percentage once, and the same dimensions are applied to the whole batch. Each image keeps its own aspect ratio, so a mixed set of portrait and landscape photos all come out right. Download the batch as a single ZIP. There is no server quota, so the practical ceiling is your device memory.

No. Decoding, resizing and re-encoding all run locally through the HTML5 Canvas API in your own browser, so your images never leave your device. Once the page has loaded you can disconnect from the internet and keep working. That matters for passport scans, signed contracts and client photos, which is the reason the tool was built this way.

Yes. Turn off the aspect-ratio lock and enter both values to force exact dimensions. The image will be stretched to fill them, so edges and faces can distort. Leave the lock on and fill in one field when you want proportional downscaling, which is right in almost every case.

It is usually the single biggest win available. Oversized images are the most common cause of a poor Largest Contentful Paint score, and LCP feeds into Google rankings. Moving a 4000px photo down to the 1200px it is actually displayed at can cut transferred bytes by 80 to 90 percent. Exporting WebP instead of JPG saves another 25 to 35 percent at the same perceived quality.

You can open JPG/JPEG, PNG and WebP, plus GIF, BMP and AVIF in newer browsers, and export to WebP, JPG or PNG. HEIC files from iPhones will not open, because most browsers cannot decode HEIC through Canvas. Convert those on the phone first, in Settings or by exporting from Photos.

Yes. Resizing, format conversion, target-size compression and batch ZIP export are free with no account, no watermark and no daily limit. There is no subscription to sell because the processing runs on your own device, so there is no server bill to pass on.