Compress Image
Shrink a JPG, PNG or WebP. Runs in your browser — nothing is uploaded.
About Compress Image
Compress Image reduces the file size of a JPG, PNG or WebP while keeping it looking essentially unchanged. You pick the quality level and see the saving before you commit. It runs entirely in your browser, so photos are never uploaded anywhere.
Modern phone cameras produce files far larger than almost any use requires. A single photo can be six or eight megabytes, which is wildly beyond what a web page, an email or a marketplace listing needs. That excess is invisible to the viewer and expensive to everyone else: slow uploads, rejected attachments, and pages that take seconds to load on a phone connection.
Page speed is where it bites hardest commercially. Images are typically the largest thing on any web page, and load time directly affects both bounce rates and search ranking. Compressing before uploading is the single most effective performance improvement available to most sites, and it costs nothing. The same applies to any system with a size cap — job portals, insurance claim forms and marketplace listings all reject oversized photos routinely.
How to Compress Image
- Select the JPG, PNG or WebP you want to shrink.
- Choose a quality level and watch the estimated file size update.
- Compare the preview against the original at full zoom.
- Step the quality back up if you can see any degradation.
- Download the compressed image.
Tips & common problems
80% quality is the usual sweet spot
For photographs, around 80% typically removes most of the file size while remaining visually indistinguishable from the original. Below about 60%, blocky artefacts start appearing in smooth areas like skies.
Screenshots belong in PNG
JPG compression puts halos around sharp text and UI edges. Screenshots, diagrams and anything with flat colour compress better and look cleaner as PNG.
Resize before compressing
If a 4000px photo will be displayed at 800px, resizing it first saves far more than any quality setting can. Use Resize Image, then compress.
Compression is one-way
Detail discarded to save space cannot be recovered, and re-compressing an already compressed file degrades it further. Always keep your originals.
Frequently asked questions
How do I compress an image for free?
Select it, pick a quality level and download the smaller file. No signup, no watermark and no limit on how many images you process.
Are my images uploaded?
No. Compression happens entirely in your browser, so personal photos never leave your device.
How much smaller will my image get?
Photographs commonly drop by 60-80% at a quality setting where no difference is visible. Images that are already optimised will shrink far less.
Will the quality visibly drop?
At sensible settings, no. The compression discards detail your eye does not register. Push the quality very low and you will start to see blockiness in gradients and smooth areas.
Which formats can I compress?
JPG, PNG and WebP. Converting a PNG photograph to JPG or WebP often saves more than compressing it as a PNG — try Convert Image for that.
Can I undo the compression?
No. The removed data is gone permanently, which is why you should always keep the original file somewhere safe.