Image Compressor
Compress JPG, PNG and WebP images online without uploading them. Batch compress, resize, and download as a ZIP. Free and private.
About the Image Compressor
Shrink photos for email, websites, forms and social media. Drop in one or many images, choose a quality level and an optional maximum size, and download smaller files. Your images never leave your device: compression happens inside your browser.
How to use it
- Drop images onto the box or click to choose them.
- Adjust the quality slider and, if you like, a maximum width or height.
- Compare the original and new sizes, then download each file or all of them as a ZIP.
How the compression works
Your browser decodes each image and re-encodes it at the quality you choose using the Canvas API, entirely on your device. Lower quality removes fine detail the eye rarely notices, which is where most of the file size goes. If the result would be bigger than the original, the original is kept, so the tool never makes a file worse.
Settings that work
For photos, a quality of 70–80% with a maximum width of 1920 pixels typically turns a 4–5 MB phone photo into a few hundred kilobytes with no visible difference on screen. For screenshots and graphics with text, WebP keeps edges sharp at small sizes. PNG is lossless, so convert PNG photos to WebP or JPG for real savings.
Common uses
Meet the file size limits on job, university and government application forms, make email attachments smaller, speed up websites and online shops, and save storage on your phone. Compress many images at once and download them together as a ZIP file.
Frequently asked questions
Are my images uploaded?
No. The images are processed by your own browser using the Canvas API. Nothing is sent to our servers, which also makes it fast.
Why didn't my PNG get much smaller?
PNG is lossless, so the quality slider has no effect on it. Convert it to WebP or JPG, or reduce its dimensions, for big savings.
What quality setting should I use?
70–80% is a good balance for photos: files are often 60–80% smaller with little visible difference.