Image to Base64 Converter
Convert images to Base64 data URLs for embedding in HTML and CSS. Decode Base64 back to images. Free and private.
Drop your image here
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Base64 Converter Features
Two-way conversion between images and Base64 data URLs.
Upload any image and instantly receive a full data URL ready to paste into HTML, CSS, or code.
Paste any Base64 data URL to preview the image and download it as a file.
Copy the entire Base64 string to clipboard with a single click.
What is a Base64 Image Data URL?
A Base64 data URL is a way to encode binary files as text so they can be embedded directly in HTML, CSS, JSON, or any text-based format without needing a separate file request.
Frequently Asked Questions
When should I use Base64 for images?
Base64 is useful for small images like icons, logos, or sprites that you want to embed directly in HTML or CSS.
It eliminates a separate HTTP request for the image file.
For large images, a regular file URL is usually better due to the 33% size overhead.
How big does Base64 make an image?
Base64 encoding increases file size by approximately 33%.
A 100 KB image becomes roughly 133 KB when Base64 encoded.
This is a trade-off for the convenience of embedding images as text.
Can I use Base64 images in emails?
Yes, Base64 data URLs can be used in HTML emails to embed images inline.
However, very large Base64 strings may be filtered by some email services.
Test in your target email clients before relying on this approach.
What is the difference between the data URL and raw Base64?
A data URL includes the MIME type header: data:image/png;base64, followed by the raw Base64 string.
Some tools require just the raw Base64 without the header prefix.
The decoder in this tool accepts both formats automatically.