Own web tool

Smaller images. Files stay yours.

Kompres processes a whole batch in the browser, with separate presets for email and websites. Images never leave the device.

Add images or drag them here
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See features

One tool, two real jobs.

01

Email mode

Produces JPEG and PNG files that email clients display directly and keeps the total attachment size in view.

02

Website mode

Creates WebP and AVIF files, with size and quality controls for use on a website.

03

Batch processing

Multiple images run through Web Workers, so the interface stays responsive while codecs do the heavy work.

Technical decisions

Processing stays on the device.

No upload

JPEG, PNG, WebP and AVIF codecs run locally. The server delivers the app but never receives the user's images.

Installable PWA

The Vite build includes a service worker and can be added to the home screen for repeat use.

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