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Image to Base64 converter

Convert any image to Base64 encoded string or data URI. Perfect for embedding images directly in HTML, CSS, and JSON. No server upload.

Drop image, click to browse, or Ctrl+V to paste

What is Image to Base64 Converter?

An image to Base64 converter transforms binary image data into a text-based Base64 encoded string. This is useful for embedding small images directly in HTML (using data URIs in img src attributes), CSS (as background-image values), JSON payloads, email templates, and SVG files. By embedding images as Base64 strings, you eliminate extra HTTP requests, which can improve page load performance for small icons, logos, and UI graphics. This tool reads your image entirely in the browser using the FileReader API — no data is uploaded to any server. It provides both the raw Base64 string and the complete data URI (including the MIME type prefix) ready to paste into your code. The tool supports all common image formats including JPEG, PNG, GIF, SVG, WebP, and ICO.

How to Use Image to Base64 Converter

  1. 1

    Upload an image

    Drag and drop any image file onto the upload zone, or click to browse your files. The tool accepts JPEG, PNG, GIF, SVG, WebP, and ICO formats.

  2. 2

    Copy the data URI or Base64

    The tool generates both a complete data URI (with MIME prefix, ready for HTML/CSS) and the raw Base64 string. Click Copy on whichever format you need.

  3. 3

    Use in your code

    Paste the data URI in an img src attribute, CSS background-image url(), or anywhere that accepts data URIs. Use raw Base64 for API payloads or database storage.

Features

  • Converts any image format to Base64 encoded string
  • Provides both data URI and raw Base64 output
  • Shows file size comparison (original vs encoded)
  • Instant image preview after upload
  • Drag-and-drop upload with one-click copy
  • Zero server upload — all processing in your browser

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Frequently Asked Questions

When should I use Base64 encoded images?+
Base64 encoding is best for small images under 10KB like icons, logos, and UI elements. It eliminates HTTP requests which speeds up page loads. For larger images, regular file references are more efficient since Base64 increases file size by ~33%.
How much larger is a Base64 string compared to the original file?+
Base64 encoding increases data size by approximately 33%. A 10KB image becomes about 13.3KB as Base64. This is because Base64 uses 4 characters to represent every 3 bytes of binary data.
What is the difference between Base64 and data URI?+
Raw Base64 is just the encoded binary data. A data URI includes the MIME type prefix (like data:image/png;base64,) which tells browsers how to interpret the data. Use data URIs in HTML and CSS, raw Base64 for APIs.
Is my image uploaded to a server?+
No. The conversion uses the browser FileReader API which reads files entirely on your device. No data is transmitted to any server.
Can I convert SVG images to Base64?+
Yes. SVG files are converted to a data URI with the image/svg+xml MIME type. This is useful for embedding SVG icons in CSS without separate file requests.
Is there a file size limit?+
No hard limit. However, Base64-encoded large images can create very long strings that slow down HTML parsing. Keep Base64 images under 50KB for best performance.