图片压缩

功能说明What It Does

图片压缩可批量减小图片体积,支持 JPEG / WebP 质量压缩与 PNG 有损(256 色)/ 无损压缩,并显示每张图的压缩比。

Batch-compress images with JPEG / WebP quality and PNG lossy (256-color) / lossless, showing per-image savings.

支持改格式与尺寸缩放,设置后即时重压,最后一键打包 ZIP 下载。

Convert format and resize, re-compress instantly, and download all as a ZIP.

适合网页图片瘦身与邮件附件优化。

Great for slimming web images and optimizing email attachments.

无需安装软件，批量压缩一步到位。

No software install — batch compression in one step.

适用人群Who Should Use

前端 / 站长优化网页加载速度。

Frontend developers and site owners optimizing page load speed.

需要压缩邮件附件、社交媒体图片的普通用户。

Everyday users who need to compress email attachments or social images.

技术原理How It Works

通过 Canvas 重绘并调用 toBlob 按质量参数压缩图片。

Redraws images on a canvas and calls toBlob to compress them by quality settings.

PNG 有损模式走 256 色量化以进一步减小体积。

PNG lossy mode uses 256-color quantization to shrink size further.

安全与隐私Privacy & Security

图片在本机压缩，不上传，隐私安全。

Images are compressed on-device and never uploaded, keeping them private.

使用步骤How to Use

1. 批量上传多张图片。Upload multiple images.
2. 选择输出格式与质量。Choose output format and quality.
3. 按需设置尺寸缩放或 PNG 有损。Set resize or PNG lossy as needed.
4. 点击「全部下载 ZIP」保存。Download all as a ZIP.

常见问题FAQ