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 re-encodes each image with HTML Canvas right in your browser — your files never leave the device.
Best results: JPG and WebP at 70–85% quality typically halve the file size with no visible difference. PNG supports both lossless optimization and lossy palette quantization while staying in .png.
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 via the HTML Canvas API. Your file never leaves your device.
- How does the quality slider work?
- For JPG and 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. In PNG lossless mode the slider is disabled because the image data stays visually identical.
- 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.