Image Base64 Converter
DeveloperConvert images to Base64 encoded strings for embedding in HTML, CSS, or JSON. Supports PNG, JPG, and GIF.
Image to Base64
PNG, JPG, GIF up to 5MB
Base64 to Image
What is This Tool?
An image to Base64 converter transforms image files (PNG, JPEG, GIF, SVG, WebP) into Base64-encoded data URI strings that can be embedded directly in HTML, CSS, and JavaScript. Eliminate HTTP requests for small images by inlining them as data URIs.
Data URIs follow the format: data:[mediatype][;base64],data. For images, this produces strings like data:image/png;base64,iVBORw0KGgo... which browsers render as images. This eliminates a network request at the cost of ~33% larger payload and no browser caching.
Common Use Cases
Performance Optimization
Inline small icons, logos, and UI elements as data URIs to reduce HTTP requests and improve initial page load.
Email HTML Templates
Embed images directly in HTML emails to avoid broken images caused by email clients blocking external image loading.
CSS Backgrounds
Embed small background images, patterns, and sprites directly in CSS files to reduce dependency on external assets.
Single-File Applications
Bundle images into standalone HTML files for offline tools, email templates, and self-contained reports.
Frequently Asked Questions
When should I use data URIs for images?
For images under 10KB where reducing HTTP requests matters (icons, small logos). Larger images are better served as files for browser caching.
Does Base64 increase file size?
Yes. Base64 encoding increases data size by ~33%. A 10KB image becomes ~13.3KB as a data URI. Gzip compression partially mitigates this.
Which image formats are supported?
All browser-supported formats: PNG, JPEG, GIF, SVG, WebP, ICO, and BMP. SVG can also be URL-encoded instead of Base64 for smaller output.