Image to Base64
Convert images to Base64 encoded strings for embedding in HTML and CSS.
How to Use Image to Base64
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Upload an image by dragging and dropping or clicking to browse.
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The Base64 encoded string is generated instantly.
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Copy the Base64 string, HTML img tag, or CSS background-image syntax.
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Paste directly into your HTML, CSS, or JSON.
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Use the size indicator to confirm the encoded image is small enough to inline.
About Image to Base64
Convert any image to a Base64-encoded data URI for direct embedding in HTML, CSS, or JSON without needing a separate image file. This technique is used to reduce HTTP requests for small images, store images in databases as text, embed images in email HTML, and include images in JSON API responses.
Upload any image (JPEG, PNG, WebP, GIF, SVG) and instantly get the Base64 string along with the ready-to-use data URI for HTML img tags and CSS background images. The tool shows you the encoded string length so you can judge if inlining is appropriate.
Best practice: inline Base64 images for small icons and UI elements (under 10KB). For larger images, serving from a CDN is almost always better for performance, as Base64 increases data size by ~33% and prevents browser caching.