Image Resizer
Resize images in your browser with preset dimensions, percentage scaling, and format conversion. JPG, PNG, WebP — processed locally, no upload to any server.
Drop an image here, paste from clipboard (Ctrl+V), or click to upload
JPG, PNG, WebP · processed locally in your browser
About this tool
Image Resizer lets you change the dimensions of an image and convert between PNG, JPEG, and WebP in a single step. Drop in a photo, pick a preset (Instagram 1080×1080, HD 1920×1080, a thumbnail) or type an exact width and height, and download the result.
Example: a 4000×3000 photo dropped to Width: 1280 with the aspect-ratio lock on becomes 1280×960. Switching the format to WebP at 80% quality typically shrinks a 3.5 MB JPEG to around 180 KB.
Useful for preparing images before uploading to a CMS, shrinking email attachments, generating thumbnails, or batching avatars to a square 512×512.
FAQ
Will resizing reduce the file size? ›
Usually yes when you also lower the dimensions and pick JPEG or WebP with a quality below 90. PNG stays lossless, so it will not shrink much — switch the download format to JPEG or WebP and drag the quality slider to compress.
Why does my resized image look blurry? ›
Up-scaling an image past its original resolution cannot add detail the camera never captured. For crisp results resize down (smaller than the source), or keep the original pixel dimensions and only change the format.
Does this work with transparent PNGs? ›
Yes. PNG and WebP keep transparency. If you convert to JPEG the transparent areas are filled with white, because JPEG does not support an alpha channel.
Is my image uploaded anywhere? ›
No. The resize happens in your browser via the HTML Canvas API, so the file never leaves your device.