Encode any image as a Base64 data URI
Drop an image into the tool and instantly get the Base64-encoded string. Use the output as a data URI in HTML, CSS, or JSON without hosting the image separately. The tool displays the encoded length, MIME type, and a live preview so you can verify the result before copying.
Use this tool freeFeatures
Multiple format support
Encode JPEG, PNG, WebP, GIF, and SVG files. The correct MIME type is automatically detected and included in the data URI prefix.
One-click copy
Copy the raw Base64 string or the full data URI with a single click. A confirmation toast lets you know the text is on your clipboard.
Output statistics
See the original file size, the encoded string length, and the encoding overhead percentage. This helps you decide whether inlining the image is worth the trade-off.
CSS and HTML snippets
Get ready-to-paste code snippets for an HTML img tag and a CSS background-image rule. Copy the snippet and drop it directly into your codebase.
How to use
Upload an image
Drag a JPEG, PNG, WebP, GIF, or SVG file into the tool. The image is read locally and never leaves your device.
Review the output
The tool displays the Base64 string, the data URI, and a live preview of the decoded image so you can confirm it matches.
Copy or download
Click to copy the data URI string or download it as a plain text file. Use the HTML or CSS snippet buttons for ready-to-paste code.
Specifications
| Input formats | JPEG, PNG, WebP, GIF, SVG |
| Output | Base64 string / data URI |
| Max file size | 10 MB |
| MIME detection | Automatic |
| Snippet formats | HTML img, CSS background |
| Processing | Client-side (no upload) |
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Common questions
When should I use Base64 instead of a regular image file?
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Base64 inlining is most useful for very small images such as icons, 1x1 tracking pixels, or tiny UI elements where saving an extra HTTP request matters more than the roughly 33% size increase that Base64 encoding adds.
Does Base64 encoding reduce image quality?
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No. Base64 is a lossless encoding of the binary file data. The decoded image is byte-for-byte identical to the original. The only trade-off is a larger text payload.
Is there a maximum file size I can encode?
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The tool accepts files up to 10 MB. Larger images will produce very long strings that may be impractical to inline. For big images, hosting the file and linking to it with a URL is almost always the better approach.
Need a smaller source image?
AI Enhance can compress and optimize images before you encode them. A smaller source file produces a shorter Base64 string, reducing your page weight.
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