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Image to Base64 Converter

Convert images to Base64 strings and data URIs, or decode Base64 back to images. Supports PNG, JPG, GIF, WebP, and SVG with drag & drop upload.

Drag & drop uploadBase64 & data URI outputImage previewDecode Base64 to imageDownload decoded imagesCopy to clipboard
Drop an image here or click to browse
PNG, JPG, GIF, WebP, SVG

How to Use the Image to Base64 Converter

  1. 1Choose between "Image → Base64" mode to encode an image or "Base64 → Image" to decode
  2. 2In encode mode, drag & drop an image onto the drop zone or click to browse for a file
  3. 3View the image preview, file info, and the generated Base64 string
  4. 4Toggle "Show as Data URI" to get the full data:image/... format ready for CSS or HTML
  5. 5Click "Copy" to copy the Base64 string or data URI to your clipboard
  6. 6In decode mode, paste a Base64 string or data URI to preview the image and download it

Frequently Asked Questions

What is a Base64-encoded image and why would I use one?

A Base64-encoded image is the binary image data converted to an ASCII text string. This lets you embed images directly in HTML, CSS, or JSON without separate file requests. It's useful for small icons, email templates, and reducing HTTP requests in web pages.

What image formats are supported?

This tool supports PNG, JPEG, GIF, WebP, and SVG images. These cover virtually all common web image formats. The tool auto-detects the image type and includes the correct MIME type in the data URI.

Does Base64 encoding increase the file size?

Yes, Base64 encoding increases data size by approximately 33% because it uses 4 ASCII characters to represent every 3 bytes of binary data. For small images (under 10KB), the trade-off of fewer HTTP requests is usually worth it. For larger images, use regular file references instead.

What is a data URI and how do I use it?

A data URI (e.g., data:image/png;base64,iVBOR...) embeds the image data directly in your code. Use it in HTML img tags (src="data:..."), CSS background-image (url("data:...")), or anywhere a URL is expected. Toggle "Show as Data URI" to get the complete string.

Is my image data secure when using this tool?

Yes. All encoding and decoding happens entirely in your browser using the FileReader API. Your images are never uploaded to any server, ensuring complete privacy for sensitive or proprietary images.

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