Image Compressor
Drop an image in, drag the slider, download the result. The compression happens on your device using the canvas your browser already draws with — the file is never sent anywhere.
Drag an image here, or
PNG, JPG, or WebP
How image compression works
A photo straight off a phone or camera stores far more color and detail than most screens can actually show. Compression finds the parts of that data a viewer won't notice missing and drops them, which is why you can usually cut a file to a third of its size with no visible difference. Push the quality slider too low and you'll start to see it — blocky edges around sharp lines, or smudged color where there used to be fine detail. The slider above lets you find the point right before that happens.
When you'd use this
- — Getting a photo under a file-size limit for a job application, form, or email attachment
- — Speeding up a website by shrinking images before uploading them
- — Freeing up phone storage without deleting the photos themselves
- — Preparing images for a slide deck without bloating the file
Common questions
Does this reduce image quality?
Slightly, depending on where you set the slider. Above roughly 70% quality the difference is very hard to see at normal viewing sizes. Below 50% it becomes more visible, especially in photos with fine detail or text.
Is my photo uploaded anywhere?
No. The compression happens using your browser's own canvas rendering — the same technology it uses to draw any web page. The file never leaves your device or touches a server.
Why is my PNG not shrinking much?
PNG is a lossless format built for graphics with sharp edges and flat color, like logos or screenshots — it doesn't compress the same way a photo does. For photos, try converting to JPG first with the image converter, then compressing.