Compress
Free Image Compressor
Make JPG, PNG and WebP files smaller without uploading them anywhere. Compare the size before and after, then download the result.
Your images never leave your device
Compress by format
How to use Image Compressor
- Drop your images on the page or pick them from your device.
- Adjust the quality setting and compare the size before and after.
- Download each compressed image, or all of them in one zip.
Frequently asked questions
Does compressing reduce image quality?
For JPG and WebP, yes, a little: the quality setting controls how much detail is discarded. At moderate settings the difference is hard to see at normal size. PNG compression is lossless and does not change any pixels.
How much smaller will my image get?
A large phone photo as JPG often shrinks by half or more with no obvious difference. WebP files shrink less because they are already efficient. PNGs shrink the least since the compression is lossless.
What is the best image format for the web?
For photos, WebP or AVIF give the smallest files and work in current browsers; JPG is the safe fallback. For logos, screenshots and graphics with transparency, use PNG, SVG or WebP.
Are my images uploaded when I compress them?
No. Compression runs in your browser with WebAssembly. The files stay on your device, and there is no signup or watermark.
Can I compress many images at once?
Yes. Add as many as you like and download them separately or as a single zip. Each image can be up to 50 megapixels.
About Image Compressor
The compressor re-encodes each image to reduce its file size, and shows the original and new sizes side by side so you can tell whether the trade-off is worth it. It works on JPG, PNG and WebP, and processing happens in your browser, so photos with personal content never leave your device. You can add many images at once and download them as a zip.
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How much you save depends on the format. JPG and WebP are lossy, so a quality setting trades visual fidelity for size. Moderate settings usually look identical at normal viewing size while cutting the file dramatically, and a heavily compressed photo from a phone can drop from several megabytes to a few hundred kilobytes. PNG is lossless, so compressing it changes how the pixels are packed but never the pixels themselves, and savings are smaller. For a bigger cut, convert a photographic PNG to JPG or WebP.
To find the right setting, lower the quality until you begin to see problems and then step back up a notch. Look at areas with fine detail, text, skin and smooth gradients such as skies, which show compression first. Always compress from the original rather than from a copy that was already compressed, because each lossy pass adds damage.
If a file is still too big after compression, there are other levers. Reducing the pixel dimensions has the largest effect, so try the resizer. Switching to a more efficient format such as WebP or AVIF shrinks it further. And removing metadata trims a little more, which is useful for photos with embedded thumbnails and editing history.