Image to Base64
Convert images to Base64 encoding
Calculator
Tip: Convert images to Base64 strings for embedding directly in HTML, CSS, or JavaScript.
- Data URL - Includes MIME type prefix, ready for src attributes
- Raw Base64 - Just the encoded string, for APIs or custom use
Drop an image here or click to upload
Supports PNG, JPG, GIF, WebP, SVG (max 10MB)
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that converts binary data (like images) into ASCII text. This allows you to embed images directly in HTML, CSS, or JSON without needing separate image files. The encoded string is approximately 33% larger than the original binary data.
When to Use Base64 Images
- Small icons and logos
- Inline email images
- Single-file HTML documents
- Reducing HTTP requests
- Large images (>100KB)
- Images that need caching
- Frequently changing images
- Performance-critical pages
How to Use
Convert images to Base64 encoded strings for embedding
Upload your image
Select a small image to convert to Base64
Generate code
The tool instantly converts and displays the Base64 string
Copy the code
Copy the data URI for use in HTML, CSS, or your code
Frequently Asked Questions
Base64 converts binary image data into text characters that can be embedded directly in HTML, CSS, or JSON. Instead of linking to an external image file, the entire image is included as a text string. This reduces HTTP requests but increases file size by about 33%.
Use Base64 for small images like icons, logos, or UI elements under 10KB. It is useful for email templates, single-file HTML documents, and reducing server requests. Avoid Base64 for large images as it increases page size and cannot be cached separately.
In HTML, use: <img src="data:image/png;base64,YOUR_CODE">. In CSS, use: background-image: url(data:image/png;base64,YOUR_CODE). Our tool provides ready-to-copy code snippets for both HTML img tags and CSS background properties.
While there is no technical limit, Base64 images over 50KB significantly impact page load performance. Browser limits for data URIs vary from 32KB in older IE to unlimited in modern browsers. For best practices, keep Base64 images under 10KB.
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