Image
图片压缩
在浏览器内压缩 JPG、PNG 和 WebP 图片。
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关于这个工具
Drop one or many images and tune the quality slider. The tool compresses images with browser-local WASM codecs: mozjpeg for JPG, libwebp for WebP, oxipng for PNG lossless optimization, and imagequant for PNG lossy palette compression.
Best results: JPG and WebP at 70–85% quality typically shrink photos with no obvious visible difference. PNG supports both lossless optimization and lossy palette quantization while staying in .png. WebP supports lossy and lossless modes.
隐私说明
只要工具可以在浏览器内完成处理，源文件就不会上传到 PixWarp 服务器。处理过程在你的设备本地进行。
PixWarp 与上传型工具对比
| Feature | PixWarp | Upload tools |
|---|---|---|
| 文件隐私 | 尽量在浏览器本地处理 | 通常需要上传到服务器 |
| 账号要求 | 无需注册 | 可能要求登录或邮箱 |
| 水印 | 不加水印 | 免费版常带品牌水印 |
常见问题
- Does my image get uploaded?
- No. Compression runs in your browser with WASM codecs. Your file never leaves your device.
- How does the quality slider work?
- For JPG and lossy WebP, the quality slider controls the compression level. In PNG lossy mode it reduces the palette with controlled quality loss while keeping a PNG output. PNG and WebP lossless modes disable the slider because the image data is preserved visually.
- Why is my PNG barely smaller?
- PNG size depends heavily on how many unique colors and transparent edges the image has. Flat graphics usually shrink well in PNG lossy mode, while already-optimized screenshots may only see a small reduction unless you switch away from lossless mode.
- What's the file size limit?
- There's no hard limit, but very large images (>50MP) may be slow on older devices because the browser has to decode and re-encode them in memory.