Quickly encode SVG to Base64 for embedding in JSON payloads, HTML src attributes, or REST API responses. Includes data URI prefix option. Runs entirely in-browser.
Available on every plan, including the free tier.
Single file up to 5 MB · 1 file per job
Up to 50 MB per file · batch up to 20 files · API + MCP access
Up to 2 GB per file · unlimited batch · runner acceleration · priority MCP
Paste or upload your SVG source
The tool Base64-encodes the SVG content using the browser's btoa() API
Copy the encoded string — with or without the data:image/svg+xml;base64, prefix
0 bytes uploaded. SVG to Base64 runs entirely in your browser using the DOM API and Canvas. Your SVGs never leave your device.
Use Base64 when embedding SVGs in JSON API responses, email HTML, or environments that can't reference external files. For HTML and CSS, URL-encoded data URIs are often preferable.
Yes. Base64 encoding adds approximately 33% overhead. For data URIs in CSS, consider URL-encoding instead — it's typically smaller for SVG.
Free tier: 5 MB SVG input. Pro: 50 MB. The Base64 output string size will be approximately 33% larger than the input.
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