Compress Image Online — Free, Fast & 100% Private

How to compress an image (3 steps)

1. Pick your image. Click the upload box or drag any JPG, PNG, WebP, or GIF file onto it. The file is read locally — it never leaves your device.
2. Set the quality. Drag the quality slider. 75% is the sweet spot for most photos (small file, barely visible difference); drop to 50–60% for web thumbnails or email attachments.
3. Compare and download. The preview updates live with the original and compressed sizes side by side. When the number looks right, download the optimized file.

Why image compression matters

Images are usually the heaviest part of any web page. A 4 MB photo can become a 300 KB file at 75% quality — the same visible result, roughly 13× faster to load. Faster pages keep visitors, rank better in Google, and use less mobile data. That is why every serious site compresses images before publishing.

FAQ

• Is my image uploaded anywhere? No. Compression happens entirely in your browser using the canvas API. Close the tab and nothing is stored.
• Does compression reduce image quality? Slightly — that is the trade. At 75–85% quality the difference is usually invisible on a screen. PNG conversion is lossless but produces bigger files for photos.
• Which format should I use on the web? JPG for photos, PNG for graphics with flat colors or transparency, and WebP for the best size-to-quality ratio when your browser supports it.