Compress image
Shrink JPG, PNG and WebP images for email and the web. Live before/after preview.
Open Compress image →What is the image compressor?
A private image compressor that shrinks JPG, PNG and WebP photos for email and the web, with a live before/after preview. You set the quality and format, watch the file size drop, and download the smaller image — all in your browser, so nothing is uploaded and it keeps working offline.
How to use Compress image
- Add an image — Drop a file onto the dropzone or click to choose one — JPG, PNG, WebP and BMP are supported.
- Pick a format — Output as JPG, WebP, PNG, or keep the original format to suit where the image will be used.
- Set the quality — Drag the quality slider (for JPG and WebP) and watch the compressed file size update instantly.
- Optionally resize — Shrink to 50%, 25%, or enter custom width and height with aspect lock to cut the size further.
- Compare and download — Toggle between Original and Compressed to check the result, then download the compressed image.
Frequently asked questions
Are my images uploaded to compress them?
No. Compression happens entirely in your browser, so your photos never leave your device and the tool keeps working offline.
Which formats can I output?
You can save as JPG, WebP or PNG, or keep the original format. JPG and WebP use the quality slider; PNG is lossless.
What quality should I choose?
Around 80% is a good default for sharing — small files that still look clean. Lower it further for email or thumbnails, raise it for detailed photos.
Can I make the file even smaller?
Yes. Resizing the image to 50%, 25% or custom dimensions reduces the pixel count, which cuts the file size on top of compression.
How can I see how much I saved?
The sidebar shows the original size, the compressed size, and the percentage saved, and you can flip between Original and Compressed to compare quality.
Tips
- WebP usually beats JPG at the same quality — try it if your target supports the format.
- Use the before/after toggle to find the lowest quality that still looks good.
- Combine resizing with compression for the smallest possible email attachments.
- Keep PNG only when you need transparency or pixel-perfect graphics — otherwise JPG or WebP is smaller.