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Compress images without losing quality - right in your browser.
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Image to Base64
Convert an image into a ready-to-use Base64 data URI.
Drag & drop an image, or click to browse
Get a ready-to-use Base64 data URI, entirely in your browser
What is a image to base64?
This tool converts an image into a Base64-encoded data URI, ready to paste directly into CSS as a background-image or into HTML as an <img> tag - useful for embedding small images without a separate file request.
How to use this tool
- 1Drag and drop an image, or click to browse and select one.
- 2Choose an output mode: raw Base64, a CSS background-image snippet, or an HTML img tag.
- 3Copy the result directly into your project.
Common use cases
Embedding a small icon or logo directly into CSS without an extra HTTP request
Inlining an image into HTML or email markup that needs to be self-contained
Quickly generating a data URI to test in a stylesheet or component
Converting an image for use in a context where linking to an external file isn't practical
Good to know
Frequently asked questions
Why is the Base64 output larger than my original image file?
Base64 encoding represents binary data using only text-safe characters, which inherently increases size by roughly 33% - this is expected and unavoidable, and is the trade-off for being able to embed the image as plain text.
When should I use a Base64 data URI instead of a regular image file?
It's most useful for small images (icons, small logos) where avoiding an extra HTTP request outweighs the larger encoded size. For larger images, a regular linked file is almost always better for performance.
Does this work for any image format?
Yes - PNG, JPG, WebP, GIF, and SVG all encode correctly, and the data URI includes the correct MIME type automatically.
Is my image uploaded anywhere?
No - encoding happens entirely in your browser using the FileReader API.
quick_facts.json
{
"runs_in_browser": true,
"data_sent_to_server": false,
"signup_required": false,
"price": "free",
"category": "Image Tools"
}