// 免费在线工具
Compress WebP
在更低质量设置下重新压缩 WebP 图像，以获得更小的文件体积。适用于需要 WebP 但现有文件仍然过大的情况。免费、无需上传、即时完成。
何时进一步压缩 WebP
WebP 本身已经是高效格式，但有时已有的 WebP 文件是以高质量设置编码的，仍可在不产生明显视觉退化的情况下进一步压缩。常见场景包括 CMS 上传的图像未在上传前优化、从 Figma 或 Sketch 导出的质量 100 图像，或继承自其他开发者工作流的 WebP 文件。
WebP 能压缩到多小？
将质量为 95 的 WebP 文件压缩至质量 75，可实现约 50% 的体积下降，在常规网页观看尺寸下几乎看不出质量损失。具体压缩率取决于原始质量设置和图像内容。前后预览实时展示视觉和体积差异。
替代方案：转换为 AVIF 以获得最大压缩率
如果需要最大压缩且用户使用现代浏览器（Chrome/Firefox/Safari 16+），可通过 WebP 转 AVIF 转换器 → 将 WebP 转换为 AVIF，文件大小比即使是最佳压缩的 WebP 还小 15–25%。
常见问题
At quality 70–80 (this tool’s default), re-compression reduces file size by 30–50% with minimal visible quality loss at typical web viewing sizes. At quality 60 and below, compression artifacts become visible, especially in complex image areas. Use the before/after preview to judge the quality trade-off.
Not through quality reduction - WebP’s lossless mode stores exact pixel data and can’t be further compressed without switching to lossy mode. Tools like cwebp with the -lossless flag and -z 9 (maximum effort) can optimize lossless WebP encoding, but this requires a command-line tool rather than a browser-based converter.
AVIF achieves 15–25% better compression than WebP at equivalent quality. If your target browsers support AVIF (Chrome 85+, Firefox 93+, Safari 16+ - approximately 93% of users), use AVIF. For maximum compatibility including Safari on older macOS, WebP is the safe choice.
Yes - for social media, WebP at quality 70–75 typically produces files under 500 KB which social platforms accept. Note that most platforms (Twitter, Instagram, Facebook) re-compress uploaded images anyway, so very high quality WebP files offer little advantage over moderate-quality ones after the platform’s own compression.