Free Tool
Image Compressor
Shrink JPG, PNG, and WEBP file sizes right in your browser. Adjust the quality, see the savings, and download — nothing is uploaded.
- Adjustable quality
- Runs in your browser
- See the savings
The same photo, a fraction of the weight
Unoptimised images are a very common reason a page loads slowly, and page speed feeds directly into Core Web Vitals.
This saves your image as a JPEG at the quality you choose, often with little visible loss on photographs, and the compression happens in your browser.
How small is small enough
There is a useful rule of thumb here, and a hard limit worth treating as a red flag.
- Under 200KB for most web images.
- Under 500KB for a full-width hero.
- If a single image on your page is over 1MB, that one file is probably your biggest speed problem — and will usually outweigh everything else you could optimise.
Illustration: a 1.2MB photo brought down to 240KB
The same photo before and after, at a quality setting you choose.
Which format to use
Format decides more than the quality slider does. Picking the wrong one means compressing hard to fix a problem you created by saving it as a PNG.
- JPEG for photographs. Decades of support, and it is what photographic compression was designed for.
- PNG only when you need transparency or crisp flat graphics — a photograph saved as PNG is needlessly enormous.
- WebP for meaningfully smaller files at the same visual quality, supported by every current browser.
Resize first, then compress
The order matters, and getting it backwards wastes most of the benefit. Compressing first only shrinks pixels you were going to throw away.
- Bring the image down to the size it is actually displayed at first.
- Then shrink what is left, here, at the quality you choose.
- Then re-run the page and confirm the change actually landed — it is easy to optimise a file that was never the bottleneck.
- 1ResizeBring it down to the size it is actually displayed at.
- 2CompressShrink what is left, at the quality you choose.
- 3Re-checkRun the page again and confirm the change landed.
Your photos never leave your browser
The compression happens on your own device. There is no upload step, no queue and no sign-up, which also means there is no file size limit imposed by a server.
- Your images are not sent anywhere while you use it.
- Client work, unreleased product shots and personal photos can go in without going anywhere.
- Nothing to delete afterwards, because nothing was uploaded.
Four numbers worth keeping
Why Parix.ai gives this away
We build fast sites for a living, and oversized images are the first thing we fix on almost every one we inherit. These tools are the same checks we run for clients, put on a public page — which is why there is no paywall and no sign-up.
Compress an imageWho uses it
Anyone whose Largest Contentful Paint is failing, and anyone who has just been handed a folder of 4MB photographs by a client and has to put them on a page this afternoon.
Do it in order
Resize first with the Image Resizer, compress here, then confirm with the Free SEO Audit.
When images are not the problem
If the page is still slow once the images are right, the audit will say what is actually holding it up. Our web development team fixes the rest.