Image to Base64 Converter Online
Convert any image to Base64 string. Get Data URI, raw Base64, CSS, or HTML output. 100% browser-based.
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Drop image here or click to browse
Converts image to Base64 string instantly
What Is Image to Base64?
Image to Base64 converts an image file into a text string using Base64 encoding. This allows you to embed images directly in HTML, CSS, or JSON without separate file requests. It's commonly used by web developers to inline small images, reduce HTTP requests, or embed images in emails.
How to Convert Image to Base64
- Upload โ Drop an image or click to browse
- Choose Format โ Data URI, raw Base64, CSS, or HTML
- Copy โ Click copy to get the encoded string
Why Use This Converter?
- Multiple Formats โ Data URI, raw Base64, CSS background, HTML img tag
- File Info โ Shows dimensions, size, and Base64 overhead
- Privacy โ Files never leave your browser
- Instant โ No upload, no waiting
FreeToolbox vs Other Base64 Converters
| Feature | FreeToolbox | Base64-Image.de | Base64Guru |
|---|---|---|---|
| Output Formats | 4 (URI, raw, CSS, HTML) | 2 | 3 |
| Privacy | Browser-only | Server upload | Server upload |
| File Info | Yes | No | Basic |
| Speed | Instant | Upload wait | Upload wait |
FAQ
Why convert images to Base64?
To embed images directly in HTML/CSS code, reduce HTTP requests, or include images in JSON/API responses without separate file hosting.
Does Base64 increase file size?
Yes, Base64 encoding increases size by approximately 33%. It's best for small images (icons, thumbnails) under 10KB.
What's the difference between Data URI and raw Base64?
Data URI includes the MIME type prefix (data:image/png;base64,...) ready for direct use in HTML/CSS. Raw Base64 is just the encoded string.
Is my image uploaded to a server?
No. The conversion happens entirely in your browser using the FileReader API.
What image formats are supported?
Any format your browser supports: JPG, PNG, WebP, GIF, SVG, BMP, and more.