What it does
Remove borders or focus on a detail without confusing preview size with file resolution. Coordinates refer to the image after browser orientation handling.
When to use it
Use this workflow when the example below matches your task and the documented limits fit your input. Keep the original and review the output before sharing it.
Steps
- Load a static image and wait for the preview.
- Drag a selection or edit X, Y, width and height; choose a ratio if useful.
- Select Crop and inspect the preview and downloaded PNG dimensions.
Worked example
800 × 600 image; X=100, Y=50, width=400, height=300.
A 400 × 300 PNG containing that rectangle, not a resize of the full image.
Common mistakes and limitations
- Up to 5 MiB, 8 MP and 4096 px per side; PNG output up to 20 MiB.
- Animations are unsupported. Color profiles may change; transparency is retained when decoded by the browser.
Frequently asked questions
Is my input uploaded?
No. Processing runs in your browser. Visiting the site downloads public software and resources; this tool does not automatically save your input or results.
How do I check the result?
Start with the worked example, compare the output and use synthetic data before processing sensitive information. Downloaded files should be opened in an independent reader.