Image to Base64 Converter Online Free
Convert any image to a Base64 string instantly. Get data URI, HTML, and CSS snippets. Also decode Base64 back to an image. Files never leave your browser.
🔒 Your file never leaves your browser. All processing is done locally.
Encode Image → Base64
How to Convert an Image to Base64
- 1
Upload your image
Click the upload zone or drag and drop any image file. JPG, PNG, WebP, GIF, and SVG are all supported.
- 2
Copy the output
The Base64 string, data URI, HTML img tag, and CSS snippet appear instantly. Click any Copy button to copy to clipboard.
- 3
Use in your project
Paste the data URI into an img src, CSS background-image, or anywhere a URL is accepted. The image is fully embedded — no external file needed.
Base64 encoding converts binary image data into a string of ASCII characters that can be safely embedded in text-based formats like HTML, CSS, JSON, and XML. This is useful when you want to inline a small icon or logo directly into a webpage without an extra HTTP request, or when passing images through APIs that only accept text.
Data URI format: A data URI combines the MIME type and Base64 data in a single string: data:image/png;base64,iVBORw0KGgo…. Browsers treat this exactly like a URL pointing to an image file.
When to use Base64: Best for small images (icons, logos under 5 KB). Larger images encoded as Base64 are ~33% bigger than the original binary, which increases page weight and reduces cacheability. For large images, use a regular URL instead.
Decoding: The reverse mode accepts a Base64 string or full data URI and reconstructs the image, which you can preview and download.