Image to Base64 Converter
Convert images to Base64 strings instantly. Embed images directly in HTML, CSS, or Markdown. Zero server upload.
Drop your image here
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Your image never leaves your browser - Private & Secure
Instant Convert
No upload, no waiting
Private & Secure
Runs in your browser
Multiple Formats
Data URI, CSS, HTML
All Images
PNG, JPG, GIF, WebP, SVG
No Upload
Files stay on your device
Browser Processing
Everything runs locally
Zero Storage
These tools run entirely in your browser. Your sensitive data never leaves your device.
Why Use Base64 for Images?
Reduce HTTP Requests
Embed small images directly in HTML/CSS to eliminate extra network requests.
Private & Secure
All conversion happens in your browser. Your images never touch any server.
Multiple Formats
Get output as Data URI, raw Base64, CSS, HTML <img>, or Markdown.
All Image Types
Works with PNG, JPG, GIF, WebP, SVG, BMP, and more.
One-Click Copy
Instantly copy the encoded string to your clipboard.
Email Friendly
Embed images in HTML emails without hosting image files.
Base64 Output Formats Explained
Data URI
data:image/png;base64,iVBORw0KGgo...Use directly in HTML src or CSS url(). Most common format.
Raw Base64
iVBORw0KGgoAAAANSUhEUgAAAAUA...Just the encoded string. Use when you need to add your own MIME type.
CSS
background-image: url('data:image/png;base64,...');Ready-to-paste CSS background-image property.
HTML
<img src="data:image/png;base64,..." alt="...">Complete HTML img tag ready for your document.
Markdown
Markdown image syntax for documentation or READMEs.
When to Use Base64 Images
✓ Good Use Cases
- • Small icons and logos (<10KB)
- • Email HTML templates
- • Single-file HTML exports
- • Embedded favicons
- • CSS sprites and small UI elements
- • JSON/API image data
✗ Avoid For
- • Large images (>50KB) - use CDN instead
- • Frequently changing images
- • SEO-important images (no alt text in CSS)
- • Images that need browser caching
- • When bandwidth is limited
Frequently Asked Questions
What is Base64 encoding?
Base64 is a way to encode binary data (like images) as ASCII text. This allows images to be embedded directly in HTML, CSS, or JSON without separate files.
Is my image uploaded to a server?
No! Conversion happens entirely in your browser using JavaScript. Your image never leaves your device.
What's the size increase with Base64?
Base64 increases file size by approximately 33%. A 10KB image becomes ~13.3KB as Base64.
When should I use Base64?
Best for small images (under 10KB) like icons, logos, and sprites. Reduces HTTP requests but increases HTML/CSS size.
What image formats are supported?
All common formats: PNG, JPG, GIF, WebP, SVG, BMP, ICO. The MIME type is preserved in the Data URI.
What's the difference between Data URI and raw Base64?
Data URI includes the prefix (data:image/png;base64,) for direct use in HTML/CSS. Raw Base64 is just the encoded string.
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