Image Resize & Convert
Upload an image to resize and convert. Processing happens in your browser.
Try it with this example
Upload a PNG or JPG, then use the width/height inputs or preset buttons (25%, Half, 150%). Change format and download.
What is this tool?
Resizing images is a common task: thumbnails, avatars, optimized web assets. Doing it wrong—stretching, poor quality, huge file sizes—hurts both appearance and performance. This Image Resize tool lets you upload an image and resize it with precise control. Set width and height, use preset scaling (25%, 50%, 150%, etc.), lock aspect ratio, and convert between PNG, JPEG, and WebP. All processing runs in your browser. Your image never leaves your device.
Upload a PNG, JPEG, or WebP file. The tool shows a preview and dimension inputs. Change width or height; with aspect ratio locked, the other updates automatically. Use the preset buttons for quick scaling. Choose output format: PNG for graphics with sharp edges, JPEG for photos (smaller, lossy), WebP for a good balance of quality and size. Click Download to save the result. No server upload, no storage, no account required.
Use cases include creating thumbnails for a gallery, resizing avatars to a standard size, optimizing images for web before upload, and converting formats for compatibility. Designers use it to produce assets at exact dimensions. Developers use it to prep images for deployment. The quality of resizing depends on the browser's canvas implementation; for most web use, it's excellent. For professional print work, use dedicated software.
WebP support varies by browser, but major browsers handle it. JPEG quality is adjustable in many tools; here the default balances size and quality. PNG is lossless—good for logos and UI elements. The tool preserves transparency in PNG and WebP. Try different formats and sizes to see what works for your project. Fast, private, and free.