Generate image thumbnail

Generate a thumbnail within a bounding box.

Local processing · Nothing is uploaded · 20 MB / 4 megapixel limit

Input & settings

Result

Open an image to begin.

How to use

Choose the maximum width and height. The image is scaled down proportionally without enlargement.

Limits and behavior

Uses deterministic nearest-neighbor sampling. No cropping is applied. Still PNG, JPEG and WebP only; 20 MB, 4 megapixels and 4,096 pixels per side. Processing stays on your device. Exports apply orientation and discard source metadata. PNG output preserves transparency unless the selected operation composites it.

Make a compact thumbnail image

Scale a larger image to fit inside the desired bounds while preserving its proportions.

Does shrinking a photo permanently replace the original?

No. The generated thumbnail is a separate download. Keep the original for higher resolution.

Related tools: resize image · crop image