画像を圧縮について
品質を維持しながら画像ファイルのサイズを縮小します。
- 入力
- JPG, PNG, WebP, HEIC
- 出力
- Download the result in the format shown beside its filename. Batch ZIP is available only where the result area offers it.
- 処理
- The current implementation processes the selected files on this device. Processing libraries, language data or models may be downloaded separately; these resource requests do not require uploading the selected file.
- 制限と動作
- The compressor caps the longest edge at 1920px. Quality starts at 80 and target size at 1MB; reaching the requested size is not guaranteed. File capacity depends on device memory and input encoding. Large or unsupported files can fail; encrypted PDFs may need to be unlocked before use. There is no site-wide file-size guarantee.
Available settings and defaults
- 画像品質のパーセンテージ（低いほどファイルサイズが小さくなります）: Default 80
- 最大ファイルサイズ（メガバイト）: Default 1
画像を圧縮の使い方
- Choose a supported file, or add and order files when the tool supports multiple inputs.
- Review the settings, then select Start processing. Wait for the result or a visible error.
- Check the result and download the output. Adjust settings and process again if needed.
画像を圧縮に関する質問
What input does 画像を圧縮 accept?
JPG, PNG, WebP, HEIC
How do I save the result from 画像を圧縮?
Download the result in the format shown beside its filename. Batch ZIP is available only where the result area offers it.
What limitations should I know about?
The compressor caps the longest edge at 1920px. Quality starts at 80 and target size at 1MB; reaching the requested size is not guaranteed. File capacity depends on device memory and input encoding. Large or unsupported files can fail; encrypted PDFs may need to be unlocked before use. There is no site-wide file-size guarantee.
Where does processing happen?
The current implementation processes the selected files on this device. Processing libraries, language data or models may be downloaded separately; these resource requests do not require uploading the selected file.
Implementation notes reviewed: 2026-10-25