批量压缩图片体积：调质量、限长边，或直接定一个目标 KB 让工具自动找合适质量。JPG / PNG / WebP 都能压，多张一次出结果、打包下载。所有处理都在浏览器本地完成，图片不上传。Batch-compress images: tune quality, cap the long edge, or set a target KB and let the tool find the right quality automatically. JPG / PNG / WebP supported, batch results with zip download. Everything runs locally in your browser — images are never uploaded.
PNG 是无损格式，压不出小体积——要明显缩小请选 JPEG 或 WebP；目标体积模式只对 JPEG/WebP 生效。GIF 只取第一帧压缩。PNG is lossless and won't shrink much — pick JPEG or WebP for real savings; target-size mode applies to JPEG/WebP only. GIFs are compressed from their first frame.