Image Resizer in KB, MB, Custom Dimensions

All in one extension to resize, crop, and optimize images with full control over format, quality, and file size.

Image Resizer — Resize, Crop & Optimize Images Instantly Image Resizer is a powerful, privacy-friendly image editing tool that works entirely in your browser — no uploads, no servers, no accounts. Everything happens locally on your device. ✦ Resize with Precision: Choose from three resize modes — by width, by height, or fully custom dimensions. Lock the aspect ratio to prevent distortion, or enable Auto Crop to fill exact dimensions perfectly. ✦ Smart Export & Compression : Export your image in WEBP, JPG, or PNG format. Choose between two compression modes: Target File Size — set a size in KB or MB and the tool automatically finds the best quality to match it Quality Mode — manually set a quality percentage for full control ✦ Crop Tool: Interactively draw and drag a crop selection directly on the image. Drag the edges or corners to fine-tune, then apply or cancel at any time. ✦ Undo Support: Made a mistake? Step back through your edits one at a time — up to 5 undo steps are saved per session. ✦ Live Preview: See the output file size, dimensions, and format update in real time as you make changes — before you download anything. ✦ Multiple Import Options: Upload an image from your computer, drag and drop it into the tool, or import directly from a URL. ✦ 100% Private: No data ever leaves your browser. No cloud processing. No accounts required.