Image Compressor
Reduce image file size while controlling quality with a visual slider
画像圧縮
JPEG・PNGの画像ファイルサイズを軽量化します
About Image Compressor
Image compression is essential for improving website page speed, meeting email attachment size limits, and preparing lighter images for social media posts. This tool uses the browser Canvas API to re-encode JPEG and PNG images with an adjustable quality parameter, effectively reducing file size without requiring any server upload.
Preset buttons for High Quality (90%), Balanced (75%), Small Size (50%), and Minimum (25%) let you pick a compression level in one click. The manual slider gives finer control, and you can compare original and compressed file sizes in real time, making it easy to find the right balance between visual quality and file weight.
Batch processing is supported so you can compress multiple images at once and download them individually or as a single ZIP archive. Because everything runs locally in the browser, your image data stays private and never leaves your device. This tool is ideal for designers, bloggers, e-commerce managers, and anyone who regularly needs to optimize images for the web.
How to use Image Compressor
- Drag and drop JPEG or PNG image files onto the drop zone, or click to select from your device. You can upload multiple files at once for batch compression.
- Choose a compression preset (High Quality 90%, Balanced 75%, Small Size 50%, or Minimum 25%) that matches your needs, or use the slider to adjust quality from 1 to 100 percent.
- Click the Compress button to re-encode each image at the chosen quality. Original and compressed file sizes and the savings percentage are shown in real time.
- Review the compression results, then download individual files or use the ZIP option to download all compressed images at once.
Benefits of Image Compressor
- Presets and slider controls let you intuitively balance visual quality against file size.
- Real-time before-and-after size comparison helps you visually find the optimal compression setting in seconds.
- Batch-compress multiple images and download them all at once as a ZIP file, saving time when processing large photo collections.
- All processing happens locally in the browser, keeping your image data private and secure without uploading to any external server.
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