Compress image size without losing quality — right in your browser

One photo compressor for PNG, JPEG, WebP, HEIC and more

Every format you'll meet is handled by the engine that suits it:

• PNG — smart palettes and dithering
• JPEG and JPG — the modern jpegli encoder, straight from a camera or messenger
• HEIC photos from an iPhone are converted to a lighter JPEG
• WebP and AVIF — re-encoded in their own format
• Animated GIF and WebP — detected and kept intact

Need to compress image size for email, a website or a strict upload form? Typical savings reach 30–70%, and the compression is honest: when a file cannot be made smaller, the original is returned untouched, so nothing ever gets bigger.

Private by design — not another compress image online tool

A typical online tool sends your data to some server and back; this extension does the same job fully offline. No tracking, no accounts, no network requests at all — your pictures never leave the computer, which also makes large batches surprisingly fast.

It asks for no access to websites either: the extension has no host permissions and cannot read or modify web pages. Originals are never touched — smaller copies go to Downloads.

Compress image file size across whole folders

Built for real work, not for one picture at a time:

• drop dozens of files or whole folders at once
• no limits on the source file size — even huge photos go through
• the queue keeps running in the background even when the panel is closed
• live progress for every file and for the batch as a whole
• stop any time; save everything as one ZIP
• work in the side panel or switch to a roomy full-tab mode

Keep the format or convert — and still maintain quality

You also control the output. Keep the original format or convert between PNG, JPEG, WebP and AVIF — either way the tool will compress the image but maintain quality, stripping bulky metadata while keeping colors, edges and fine details intact.

Quality levels High, Medium and Low are auto-tuned per image; Original changes only the format. Re-run any group at another setting without re-adding the files — every option carries a plain-word hint.

Serious tech under the hood: jpegli, libavif and SSIMULACRA 2

Adaptive algorithms pick the right settings every time you compress image files, so a noisy photo and a flat UI icon are never treated the same way:

• Adaptive quality — SSIMULACRA 2 checks every file
• Noise and texture scan — grain is measured up front
• jpegli and libavif — encoders from Google and AOMedia
• Smart PNG palettes — colors tuned per image
• Quality levels — high, medium and low, auto-tuned
• WebAssembly speed — native speed, zero installs