Image Cropper
WebCrop images to exact dimensions or aspect ratios like 1:1, 16:9 and 4:3 with a drag-to-select editor. Lock the ratio and export PNG, JPEG or WebP in one click.
Related Tools
About Image Cropper
Cropping is a fundamental photo edit: trim unwanted edges, improve composition, or fit a fixed size so images display pixel-perfect on each platform. This drag-to-select editor supports free crop and locked ratio guides like 1:1, 16:9, 4:3 and 3:2, and lets you type exact pixel dimensions or coordinates for precise output. It runs locally on a canvas, so your images are never uploaded. A common misconception is that cropping just hides part of the frame — in fact the image is re-rendered at the new dimensions, so reducing size re-samples the pixels and excessive upscaling will never add detail that wasn't there. Live preview shows the output pixel size and an estimated file size before export, helping you hit platform limits in one pass. Export to PNG, JPEG or WebP with adjustable quality, choosing JPEG or WebP when no transparency is needed to save file weight. The tool is ideal for social avatars, video thumbnails, ID photos, web banners and cleaning up busy edges.
How to Use
- Open the Image Cropper tool
- Enter or paste the content to process
- Adjust the output options as needed
- Click the Run button; results appear in real time
- Copy or export the result
Use Cases
- Social avatars — Crop images to a 1:1 square for WeChat, Twitter, GitHub and other platform avatars.
- Video thumbnails — Crop images to 16:9 for YouTube and Bilibili video covers.
- ID photos — Crop portraits to ID-photo specifications, removing extra background.
- Web banners — Crop images to a specific size for website banners or hero sections to avoid CSS distortion.
- Trim edges — Cut out unnecessary border elements to make the subject stand out.
FAQ
Which crop ratios are supported?
Free crop plus locked ratios including 1:1, 16:9, 4:3, 3:2 and 2:3. You can also enter a custom ratio manually.
Can I specify exact dimensions?
Yes. Enter the target width and height (in pixels) in the inputs next to the crop box and it will adapt automatically.
Does cropping make the image blurry?
Cropping itself preserves quality, but enlarging a small crop back to the original size will look soft. Crop once to the target size to avoid double scaling.
Which export formats are supported?
PNG, JPEG and WebP. JPEG and WebP quality is adjustable; prefer them when transparency is not needed for smaller files.
Why is the output smaller than the original file?
Cropping reduces pixel count and re-encodes the image, both of which shrink size. This is expected and usually desirable for web use.
Are my images uploaded?
No. All cropping runs locally in your browser via the Canvas API, so your images never leave your device, even private photos.