Image to Base64 Converter
Convert images to Base64 encoded strings for use in CSS, HTML, or as data URIs. Base64 encoding allows you to embed images directly in your code without external file references.
Step 1: Upload Image
Drag & drop your image here
or click to browse files
Supported formats: PNG, JPG, WEBP, GIF, SVG, ICO
Maximum file size: 5MB (larger files will result in very long Base64 strings)
Step 2: Conversion Options
Original Image
Base64 Conversion Options
Step 3: Base64 Result
Preview
Base64 Output
How to Use This Base64 String
Use the Base64 string in an HTML img tag:
Use the Base64 string as a CSS background image:
Use the Base64 string in JavaScript to create an image:
How to Use the Image to Base64 Converter
- Upload your image by dragging and dropping it into the upload area or clicking to browse your files.
- Choose conversion options:
- Select the output format (Data URI or Base64 string only)
- Optionally resize the image to reduce the Base64 string length
- Choose whether to convert the image to a different format before encoding
- Adjust quality settings for JPG or WEBP formats
- Click the "Convert to Base64" button to process your image.
- Copy the resulting Base64 string to your clipboard.
- Use the provided examples to implement the Base64 string in your HTML, CSS, or JavaScript.
About Base64 Encoding for Images
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. When applied to images, it allows you to embed image data directly in HTML, CSS, or JavaScript without requiring a separate image file.
Reduced HTTP Requests
Base64 encoded images are embedded directly in your code, eliminating the need for separate HTTP requests to fetch image files.
Self-Contained Code
Your HTML, CSS, or JavaScript becomes self-contained with all assets embedded, making it easier to share or distribute.
Avoids CORS Issues
Base64 encoded images bypass cross-origin resource sharing (CORS) restrictions since they're not loaded from external sources.
When to Use Base64 Encoded Images
- Small Images: Icons, logos, and small UI elements that are under 10KB.
- Single-File Applications: When you need a completely self-contained HTML file.
- Email Templates: To ensure images display properly in email clients without requiring external image loading.
- Offline Applications: For web apps that need to function without internet access.
- SVG Embedding: When embedding SVG content in CSS where direct SVG syntax isn't supported.
When Not to Use Base64 Encoded Images
- Large Images: Base64 encoding increases file size by approximately 33%, making it inefficient for large images.
- Frequently Changing Images: Base64 encoded images are embedded in your code, making updates more difficult.
- Images That Need Caching: Browser caching works better with separate image files than with embedded Base64 strings.
- Performance-Critical Applications: For large websites, separate image files that can be loaded in parallel may provide better performance.
Data URI Format
A Data URI is a URI scheme that provides a way to include data in-line in web pages as if they were external resources. The format is:
For example, a PNG image encoded as Base64 would have a Data URI like: