How to compress an image
- Add your images. Drag them onto the box above or click to browse. You can add a whole batch.
- Pick an output format. Auto keeps the original type; JPG gives the smallest photos; WebP is even smaller and modern; PNG stays lossless.
- Set quality & size. Lower the quality slider for smaller files (75–85% is the sweet spot), and optionally cap the width to shrink large photos further.
- Compress & download. Press Compress and see the new size and percentage saved, then download each image or grab them all as a ZIP.
Why compress images?
- Faster websites. Large images are the number-one cause of slow pages. Smaller files load quicker and improve SEO.
- Email & upload limits. Many forms, emails and portals cap attachments — compression gets you under the limit.
- Save storage & data. Smaller photos take up less space and use less mobile data to share.
Lossy vs lossless — which format?
JPG and WebP are lossy: they throw away detail your eye barely notices to make files dramatically smaller — perfect for photographs.PNG is lossless: it keeps every pixel exactly, which matters for logos, screenshots and graphics with sharp edges or transparency, but the files are larger. For most photos, WebP at ~80% gives the best size-to-quality ratio; choose JPG if you need maximum compatibility.
Is it private?
Completely. Unlike most “online compressors” that upload your photos to a server, this tool compresses each image right inside your browser. Your pictures are never uploaded, stored or seen by anyone — not even us. It even keeps working offline once the page has loaded.
Frequently asked questions
Does this compressor upload my files?
No. Everything happens in your browser; your images never leave your device.
Is there a file-size or batch limit?
No limits, no watermark — compress as many as you like and download them as a ZIP.
What formats can I use?
Input: JPG, PNG, WebP, GIF, BMP. Output: JPG, WebP or PNG.
Will it reduce quality?
JPG/WebP are lossy and you control the trade-off with the slider; 75–85% is usually visually identical while much smaller.
Related: got iPhone photos? Convert them first with ourHEIC to JPG converter, then compress them here.