Image Optimizer

Professional compression engine — high-quality JPEG, optimized PNG and next-gen AVIF, processed locally in your browser. Free, unlimited.

이미지를 여기로 끌어다 놓거나 클릭하여 선택하세요

Supports JPG / JPEG / PNG / WEBP, up to 40MB

  • 최적화는 브라우저에서 완료됩니다 (첫 사용 시 엔진 로드, 큰 이미지: 1~5초)
  • 결과는 24시간 보관 후 자동 삭제됩니다
  • 작업이 자동 저장됩니다: 페이지를 닫아도 24시간 안에 돌아와 확인할 수 있습니다 (마지막 작업만 유지. 시크릿 모드나 브라우저 캐시 삭제는 피하세요)

업로드 후 최적화 결과가 여기에 표시됩니다

80

처리는 브라우저에서 완료됩니다. 원본과 결과는 24시간 보관 후 자동 삭제됩니다

Advanced settings

How the Professional Compression Engine Works

This image optimizer bundles a professional open-source compression engine that runs entirely in your browser. JPEG uses progressive encoding with optimized quant tables — the low-res outline loads first, then detail sharpens progressively; combined with quantization tuned to human visual sensitivity, files are smaller at equal quality and load perceptually faster. PNG is optimized losslessly — compression parameters and filtering are recomputed so not a single pixel is lost while the file shrinks noticeably, ideal for transparency or pixel-perfect output. AVIF is based on AV1 video coding technology and compresses still images with intra-frame coding: about 50% smaller than JPEG and 20-30% smaller than WebP at the same quality, making it one of the best choices for modern web images. All encoding happens locally — your image never leaves your device.

Who It's For

Professional image optimization serves anyone who cares about both quality and size: photographers and designers deliver work that keeps detail while staying manageable; e-commerce product shots where image quality drives conversion; blogs and content sites that stay crisp yet load fast; long-term photo archives where lossless-optimized PNG and efficient AVIF are ideal. All free, no sign-up — just open the page and optimize.

FAQ

Is this tool free?

Yes, completely free with no sign-up and no usage limits.

How is this different from the Image Compressor?

Image Compressor is the quick & simple version. Image Optimizer uses a professional open-source compression engine: higher-quality JPEG encoding (progressive + optimized quant tables), lossless PNG optimization (same quality, smaller files), and the next-gen AVIF format (20-50% smaller than WebP at the same quality).

What is AVIF?

AVIF is a next-generation image format based on AV1 video coding technology, far more efficient than JPEG and WebP. Modern browsers (Chrome, Firefox, Safari 16+) preview and use it natively.

Does PNG optimization lose quality?

No. PNG optimization is lossless: only the compression algorithm and parameters are re-optimized — every pixel is preserved, while the file gets noticeably smaller.

Which image formats are supported?

JPG, JPEG, PNG and WEBP input (up to 40MB); output as JPEG, PNG or AVIF.

What is the output format?

The format you choose (JPEG by default). The download is named "name-optimized.extension".

Is my file stored?

No. Images are automatically deleted within 24 hours after processing (same as our other tools).

Can I close the page after uploading?

Yes. Your task is saved in this browser automatically — come back within 24 hours to see the results (only the latest task is kept; do not use private browsing or clear your browser cache).