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Image Compressor

Reduce JPEG, PNG and WebP file sizes in your browser for websites, email and sharing.

FreeNo sign-upMobile friendlyLocal processing
TOOL 01

画像圧縮

画質を調整しながら、画像のファイルサイズを小さくします。

● 端末内で処理
画像をここにドロップまたは ファイルを選択JPEG・PNG・WebP / 最大25MB
HOW TO USE

How to use Image Compressor

Reduce JPEG, PNG and WebP file sizes in your browser for websites, email and sharing.

What this tool does

High-resolution photos often contain more data than their visible detail requires. Compression reduces that data without changing the pixel dimensions.

Stronger compression makes smaller files but can soften fine detail. Use the preview to find the right balance for your purpose.

Useful for

  • Speed up a website
  • Fit an email attachment limit
  • Share phone photos more easily

Three simple steps

  1. 01

    Choose or drop an image

  2. 02

    Adjust the compression quality

  3. 03

    Check the preview and download

Tips for better results

Start around 78%

For photos, 70–85% is often a useful starting range.

Try JPEG or WebP for photos

PNG is excellent for graphics, but photographs are often smaller as JPEG or WebP.

Frequently asked questions

Is my original overwritten?

No. The result is downloaded as a new file.

Is my image uploaded?

Standard compression is completed inside your browser.