Image Compressor

Reduce image size in your browser — JPEG/WebP/PNG quality compression and resizing, processed locally. Free, unlimited.

이미지를 여기로 끌어다 놓거나 클릭하여 선택하세요

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

  • 압축은 브라우저에서 즉시 완료됩니다 (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 압축 결과가 여기에 표시됩니다

80

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

How Image Compression Works

Image compression balances visual quality against file size. JPEG is lossy: a discrete cosine transform (DCT) converts the image from the pixel domain to the frequency domain, discarding high-frequency details the human eye barely notices, then quantizes and entropy-codes the coefficients — stronger quantization means smaller files and more visible artifacts. PNG is lossless: it uses the DEFLATE algorithm to compress without losing a single pixel, ideal for lossless needs and transparency, though usually larger. WebP supports both modes and is typically 25%+ smaller than JPEG at comparable quality. This tool runs all encoding in your browser, so no compression data is sent for processing — faster and more private.

Who It's For

Image compression helps whenever pictures need to travel: websites and newsletters load faster with smaller images; email and messaging apps have attachment limits; e-commerce product shots and ID photos need the right balance of clarity and size; photo archives and asset libraries free up storage. No sign-up needed — just open the page and compress for free.

FAQ

Is this tool free?

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

Which image formats are supported?

JPG, JPEG, PNG and WEBP, up to 40MB per file.

Where does the compression happen?

Compression runs entirely in your browser (no server queue — faster). To support history and sharing, the source and result are still uploaded and kept for 24 hours, then deleted automatically.

How do I get the best result?

For photos, use JPEG at quality 70-80 (visually identical). Use PNG for transparency or fine linework (lossless). Choose WebP for the smallest size. If the image is very large, resizing it first can cut the size by 90% or more.

Can PNG be compressed?

Yes. PNG is lossless, so every detail and the alpha channel are kept. If you need a smaller file, convert to WebP (supports transparency, smaller) or JPEG (no transparency).

What is the output format?

The format you choose (same as the original by default). The download is named "name-compressed.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).