image

Image format conversion

Rules

User wants to convert an image/change dimensions/make an ICO/convert to Base64 → run cyeam image convert → return the result.

用户: "把这张 PNG 转 JPG"            →  cyeam image convert input.png -f jpg
用户: "把这图缩小到宽 800"          →  cyeam image convert input.png -w 800 -f jpg
用户: "做一个 favicon.ico"          →  cyeam image convert input.png -f ico
用户: "转成 WebP"                   →  cyeam image convert input.png -f webp
用户: "转成 Base64"                 →  cyeam image convert input.png -f base64

Command

cyeam image convert <input> -f <format> [options]

Parameters:

Parameter	Description
-f, --format	Target format (required): jpg / png / webp / gif / ico / base64
-o, --out	Output file path (when unspecified, use <原名>.<新扩展名>）
-q, --quality	JPG quality 1-100 (default 90, WebP is lossless, this parameter has no effect)
-w, --width	Target width px
-H, --height	Target height px
--keep-ratio	When only width or height is given, scale proportionally (default true)

Supported formats

• Input: PNG / JPG / GIF / WebP / SVG (rasterized)
• Output: PNG / JPG / GIF / WebP (lossless) / ICO (multi-size 16/32/48px favicon) / Base64 (data URL)

Output

• jpg/png/webp/gif/ico: write to file, stdout outputs saved: <path>
• base64: directly output data URL text to stdout (can be combined with --pretty for clean output)

Notes

• No login required
• SVG input will be rasterized into a bitmap (256×256 by default, can be specified via width and height)
• ICO output automatically includes three sizes 16/32/48, and browsers pick as needed
• WebP output is lossless VP8L (preserves all details)
• Use --pretty to remove the JSON envelope and only see the output