Image to Base64 converter
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How to use Image to Base64 converter
- Upload an image.
- The tool encodes it as a Base64 data URI string.
- Copy the string to embed the image directly inline in HTML, CSS, or JSON without a separate file request.
Limitations
- Base64 encoding increases the effective size by roughly 33% — only inline small images (icons, small logos) this way, not large photos.
About this tool
Image to Base64 converter is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Image & Media Tools. Browse more Image & Media Tools tools.