Compress images without uploading them
Most online image compressors upload your files to a server, process them there and send them back. This one does the work inside your browser: the image is read, re-encoded and handed back to you without a network request. That makes it safe for screenshots of internal dashboards, client work, or anything you would rather not hand to a third party.
How to use it
- Drop up to 10 PNG, JPG or WebP files onto the box above, or click to choose them.
- Each image is compressed as soon as it is added; the percentage shows how much smaller it became.
- Download images one by one, or use Download all to get a single ZIP.
Why smaller images matter
Images are usually the heaviest part of a web page, and the largest image on screen is often what Google measures as Largest Contentful Paint (LCP). Cutting a 2 MB hero image to 300 KB can move LCP by whole seconds on a mobile connection — a direct improvement to Core Web Vitals and to how quickly readers see your content.
Frequently asked questions
Are my images uploaded anywhere?
No. Compression runs in your browser using a Web Worker, so your images never leave your device. You can disconnect from the internet after the page loads and it still works.
Is the compression lossless?
It is high-quality lossy compression (starting at 90% quality), which is visually indistinguishable for most photos and screenshots while cutting file size substantially. Images already optimised by another tool may shrink very little.
What is the maximum file size or dimension?
Output is capped at about 2 MB and 2560 px on the longest side, which suits websites, blogs and documentation. Larger images are resized proportionally.
Which format should I use on my website?
WebP is usually the best default for the web: smaller than JPG at the same quality, with transparency support like PNG. Use PNG for images that need pixel-perfect sharp edges, such as UI screenshots with small text.
Built and maintained by Pradeep Bhandari, Senior Engineering Manager & Full-Stack Architect. Last reviewed .