File ConversionImage ConversionFree Tool
Image to Base64
Encode any image file as a Base64 data URI string, ready to paste directly into CSS (background-image: url(...)) or HTML (<img src="...">) .
How to Use Image to Base64
- 1Upload your image file
- 2The Base64 data URI is generated automatically
- 3Copy the string to use in your CSS or HTML
Frequently Asked Questions
A full data URI string (data:image/png;base64,... or similar, matching your source file's format) — ready to paste directly as a CSS background-image value or an HTML img src attribute.
No — the original file's bytes are encoded as-is; a PNG stays a PNG, a JPG stays a JPG, just represented as base64 text instead of a binary file.
It avoids a separate HTTP request for small images (icons, small graphics), which can help in specific performance scenarios — but base64 text is roughly 33% larger than the original binary file, so it's not ideal for large images.
No — the encoding happens entirely in your browser.
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Decode a Base64 image string (with or without the data: URI prefix) back into a viewable, downloadable image file.