🔄 Image to Base64
Convert images to Base64 encoding
Base64 Output
Copy and use the encoded string
Convert any image to a Base64-encoded data URI instantly — ready to embed directly in HTML, CSS, or JSON without a separate HTTP request. No server upload, 100% browser-based.
What is an Image to Base64 Converter?
An Image to Base64 converter encodes an image file (JPG, PNG, GIF, WEBP, SVG) into a Base64 string that can be embedded directly in HTML as a data URI (data:image/png;base64,...). This allows images to be included inline without requiring a separate HTTP request, which can improve performance for small icons and email templates.
Why Use Utilo's Image to Base64 Converter?
- ✓Embed images directly in HTML/CSS without external file requests
- ✓Perfect for email templates where external images may be blocked
- ✓Useful for small icons and inline SVGs in CSS
- ✓Convert in your browser — images are never uploaded
- ✓Supports JPG, PNG, GIF, WEBP, and SVG
- ✓Copy the data URI with one click
- ✓Free, unlimited, no account needed
Key Features
How to Convert an Image to Base64
- 1Upload your image by clicking or dragging it onto the tool
- 2Wait a moment for instant encoding
- 3Copy the complete data URI from the output
- 4Paste as the src of an <img> tag or a CSS background-image value
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding that represents binary data (like an image) as an ASCII string using 64 printable characters. It lets binary files be embedded in text documents like HTML or JSON.
Does Base64 increase image file size?
Yes. Base64 encoding increases size by approximately 33% because it takes 3 bytes of binary data and encodes them as 4 text characters.
When should I use Base64 images?
Best for small UI icons, placeholder images, or email templates where external images may be blocked. Avoid Base64 for large images — it increases HTML file size and slows page loads.
Can I use the output in a CSS file?
Yes. In CSS use: background-image: url("data:image/png;base64,..."). Works in all modern browsers.
Are my images uploaded to a server?
No. The FileReader API in your browser handles the conversion locally. No image is transmitted over the internet.