Cleanor Image Optimizer

Optimize images without uploading them anywhere. Cleanor Image Optimizer compresses your pictures and converts them between modern formats entirely inside your browser — no account, no servers, no tracking.WHAT IT DOESCompress JPEG, WebP and AVIF with a quality slider, or re-save PNG losslessly.

Convert formats: drop PNG, JPEG, WebP, AVIF, GIF or BMP, and export WebP, AVIF, JPEG or PNG.

Right-click any image on a page and choose "Optimize image with Cleanor".

Batch process: add many images at once (drag & drop, file picker, or paste) and see per-image and total savings.

Optional max-width resize.WHY IT'S DIFFERENT100% on-device. Images are processed with your browser's own encoder and never leave your computer.

No permissions. The extension requests no browsing access and collects no data.

Fast and lightweight. No sign-in, no ads.

Prefer to work on the web, or need HEIC/AVIF output and dozens more tools? Visit cleanor.app/tools — the same privacy-first toolkit, in your browser.