About Image to Base64
The Image to Base64 converter encodes any image into a Base64 string right in your browser. Choose plain Base64, a complete data URL, an HTML <img> tag or a CSS background rule — whichever format your project needs.
Base64-embedded images are handy for small icons and logos in HTML emails, single-file web pages, JSON payloads and CSS sprites, because they remove a separate HTTP request. The tool shows the encoded size so you can judge the trade-off.
Encoding happens with the FileReader API on your device — the image is never uploaded anywhere.
How to Use the Image to Base64
- Choose an image file from your device.
- Pick the output format — data URL, raw Base64, <img> tag or CSS background.
- Click Copy and paste the string into your HTML, CSS or code.
Features
- Four output formats: data URL, raw Base64, HTML tag, CSS rule
- Shows original and encoded sizes
- Handles PNG, JPEG, GIF, WebP, SVG and more
- Fully client-side conversion
Frequently Asked Questions
When should I embed images as Base64?
For small images (under ~10 KB) like icons where saving an HTTP request outweighs the ~33% size increase from encoding. Large photos are better served as normal image files.
Why is the Base64 version bigger than my file?
Base64 represents every 3 bytes of binary data with 4 text characters, adding roughly 33% overhead. That's the cost of making binary data safe to paste into text formats.
Is the Image to Base64 converter free?
Yes, the Image to Base64 converter is completely free with no usage limits. No signup, no account and no installation required.
Is my data safe?
Yes. All processing happens locally in your browser using JavaScript — nothing you type is uploaded or stored on our servers.
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