Three simple steps
How to use the Image Compressor
- 01
Choose a JPG, PNG or WebP image up to 25 MB.
- 02
Adjust output quality and maximum width.
- 03
Process, compare the size and download the new image.
Private file tool
Image Compressor
Reduce image file size with adjustable quality and dimensions while keeping the original file on your device.
Instant calculation Runs in your browser
✓ Your image is processed locally and is not uploaded.
IMGYour processed image will appear here
Choose a file to begin.
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Worked example
Compress a 4,000 px phone photo
CalculationResize to 1,920 px and encode at 78% quality
ResultA smaller downloadable JPG, often 60–85% lighter
The method
How it works
Local processing
The browser decodes the image, redraws it to a canvas and creates the output without sending the file to a server.
Smart resizing
Images wider than the selected maximum are scaled down proportionally; smaller images keep their dimensions.
Efficient formats
JPEG inputs remain JPEG. PNG inputs become WebP, which often preserves transparency at a smaller size.
Helpful answers
Frequently asked questions
Is my image uploaded?
No. Processing happens in your browser, and the generated download uses a temporary local browser URL.
Why can a PNG become WebP?
WebP usually compresses photographic or transparent PNG content more efficiently while modern browsers support it broadly.
Does compression always make a file smaller?
Usually, but very small or already-optimised files can become similar in size or occasionally larger. The comparison is shown before download.