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Image Compressor
Reduce the weight of a photo or graphic without sending it anywhere. Pick a format, drag the quality slider, and download the result.
Drop an image here
JPG, PNG, or WebP. You can also click to choose a file.
Original
Compressed
How to use this tool
- Drop a JPG, PNG, or WebP file onto the box, or click it to open your file picker.
- Choose an output format. Use WebP or a lower JPG quality for the smallest files; stay on PNG when you need a sharp graphic with transparency.
- Optionally cap the longest side in pixels if the photo is larger than you need.
- Compare the two previews and the file-size stats, then click Download.
Frequently asked questions
Does this upload my image?
No. The image is read and compressed in your browser with the Canvas API. ToolNest never receives the file.
Why is my PNG still large?
PNG is a lossless format, so a quality slider cannot shrink it the way JPG or WebP can. Convert to WebP or JPG when a smaller file matters more than a lossless original.
Will the photo look worse?
Lower quality means more compression artifacts, especially in smooth skies or gradients. Start around 0.8 and only go lower if you need a much smaller file. The preview shows the result before you download.
What is a good size for the web?
For a blog or social preview, 1200–1600 pixels on the long side at 0.7–0.85 JPG or WebP quality is usually plenty. Use the resizer if you also need exact dimensions.