Image Resizer & Cropper
Resize and crop images entirely in your browser — drag the crop box, pick a size, download as JPEG, PNG or WEBP. Nothing is ever uploaded.
Resize or crop images online without uploading — everything runs locally in your browser. Change dimensions in pixels or percent, lock the aspect ratio, choose quality and download as JPG, PNG or WebP.
Codecs: browser-native canvas; output JPG, PNG or WebP.
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No image yet.
How to use the Image Resizer & Cropper
- Drop or select an image.
- Set the target width/height (or percent), or crop by dragging the box.
- Choose the format and quality, then download.
Frequently asked questions
How do I resize an image without losing quality?
Set the target dimensions and pick a high quality value. PNG resizing keeps lossless compression.
Is my photo uploaded to a server?
No. Files stay on your device — the tool works fully offline once loaded.
What file types are supported?
JPG, PNG, WebP, GIF and BMP can be opened; output is JPG, PNG or WebP.
Can I crop to exact pixel dimensions?
Yes — set the crop box to a fixed width and height for exact output.
Fun facts about Image Resizer
- Resizing an image down (downsampling) generally produces better quality than resizing up (upsampling), because the algorithm has more data to work with.
- The most common image resizing algorithms are nearest-neighbor (fastest, lowest quality), bilinear (medium), and bicubic (slowest, highest quality).
- The srcset attribute lets the browser pick the best image file for the screen's size and pixel density, so phones don't download desktop-sized images.
- Lossy formats like JPEG lose quality every time you resize and re-save, while lossless formats like PNG maintain quality through multiple edits.