✒️ JPG 转 SVG（照片/扫描件矢量化）JPG to SVG Converter
把 JPG/JPEG 照片、扫描的 Logo 或手绘线稿描摹成 SVG 矢量路径：先用降噪模糊去掉 JPG 压缩噪点，再按颜色数生成可无限放大的矢量图，也可用黑白模式提取线稿和签名，图片不上传。Trace JPG/JPEG photos, scanned logos or hand-drawn sketches into SVG vector paths. A smoothing blur first removes JPEG compression noise, then the chosen number of colours becomes infinitely scalable vectors — or use black-and-white mode to extract line art and signatures. Nothing is uploaded.
使用说明与常见问题How-to & FAQ
「JPG 转 SVG（照片/扫描件矢量化）」是什么？What is the JPG to SVG Converter tool?
把 JPG/JPEG 照片、扫描的 Logo 或手绘线稿描摹成 SVG 矢量路径：先用降噪模糊去掉 JPG 压缩噪点，再按颜色数生成可无限放大的矢量图，也可用黑白模式提取线稿和签名，图片不上传。Trace JPG/JPEG photos, scanned logos or hand-drawn sketches into SVG vector paths. A smoothing blur first removes JPEG compression noise, then the chosen number of colours becomes infinitely scalable vectors — or use black-and-white mode to extract line art and signatures. Nothing is uploaded.
如何使用「JPG 转 SVG（照片/扫描件矢量化）」？How do I use the JPG to SVG Converter tool?
在「JPG 转 SVG（照片/扫描件矢量化）」中，按需设置「颜色数」、「细节」、「降噪模糊」、「描摹尺寸」等选项，然后点击「下载 SVG」、「复制 SVG 代码」、「取消」按钮即可。支持拖放文件。In the JPG to SVG Converter: Set "Colors", "Detail", "Smoothing blur", "Trace size", then click "Download SVG", "Copy SVG code", "Cancel". Drag-and-drop files is supported.
JPG 转 SVG 和 PNG 转 SVG 有什么不同？How is JPG to SVG different from PNG to SVG?
JPG 是有损压缩，边缘附近有方块和杂色，直接描摹会产生大量碎小路径。建议把“降噪模糊”设为 1–2、颜色数设为 4–16，可以得到干净得多的矢量图。JPG is lossy, so edges carry block artefacts and noise that turn into many tiny paths when traced. Set Smoothing blur to 1–2 and Colors to 4–16 for a much cleaner vector.
扫描的签名或手绘稿怎么处理？How do I trace a scanned signature or sketch?
勾选“黑白描摹”，工具会把图片二值化后只生成深色路径，适合把纸上的签名、印章、线稿变成可缩放的 SVG，再导入 Illustrator、Inkscape、Figma 或激光雕刻软件。Tick Black & white: the image is thresholded and only dark paths are generated, turning a signature, stamp or line drawing on paper into a scalable SVG for Illustrator, Inkscape, Figma or laser-cutting software.
照片能变成矢量图吗？Can a photo become a vector?
可以，但结果是色块拼贴风格（类似海报效果），而不是照片级细节；颜色和细节越多，SVG 文件越大，可能比原 JPG 大很多倍。描摹使用开源 imagetracerjs（Unlicense），在浏览器后台线程完成。Yes, but the result is a posterised, flat-colour look rather than photographic detail; more colours and detail mean a far bigger SVG, often many times the JPG. Tracing uses the open-source imagetracerjs (Unlicense) in a background thread in your browser.
也能用 PNG 或 WebP 吗？大照片为什么会超时？Can I use PNG or WebP? Why do big photos time out?
可以，PNG 和 WebP 图片也能直接选择，处理方式相同。描摹时间随像素数增长：默认“≤ 1000 px”会先把长边缩到 1000 像素；选“原尺寸”时，一张 3000×2000 的照片可能超过 60 秒的时限并提示超时。描摹进行中可以点“取消”停止。Yes — PNG and WebP images can be chosen too and are handled the same way. Tracing time grows with the pixel count: the default "≤ 1000 px" first scales the long side down to 1,000 pixels, while "Original" on a 3000×2000 photo can exceed the 60-second limit and report a timeout. Click Cancel to stop a trace in progress.
图片会被上传到服务器吗？Are my images uploaded?
不会。「JPG 转 SVG（照片/扫描件矢量化）」使用浏览器 Canvas 在本地处理图片，处理后的文件直接从你的浏览器下载。No. The JPG to SVG Converter processes images locally with the browser Canvas API and the result downloads straight from your browser.
「JPG 转 SVG（照片/扫描件矢量化）」免费吗？需要注册吗？Is the JPG to SVG Converter free? Do I need an account?
「JPG 转 SVG（照片/扫描件矢量化）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The JPG to SVG Converter is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.