Base64 Image Encoder — Convert Images to Data URIs [2026]
Free base64 image encoder. Convert PNG, JPG, SVG, GIF, and WebP images to base64 data URI strings. Copy CSS background or HTML img tag. 100% browser-based.
Click to upload or drag & drop an image
Supports PNG, JPG, GIF, SVG, and WebP
What is Base64 Image Encoder?
How to Use Base64 Image Encoder
1. Click the upload area or drag and drop an image file (PNG, JPG, GIF, SVG, or WebP). 2. The tool instantly converts the image to a base64-encoded data URI string. 3. Copy the raw base64 string, the complete data URI, an HTML <img> tag, or a CSS background-image rule. 4. A preview of the image is displayed alongside file information (size, type, dimensions).
How Base64 Image Encoder Works
Common Use Cases
- Embedding small icons directly in CSS to reduce HTTP requests
- Including images in HTML email templates that display without external loading
- Encoding images for use in JSON payloads or API requests
- Creating self-contained HTML files with embedded images
- Converting SVG icons to data URIs for inline use
Frequently Asked Questions
What is a base64 data URI?▼
A data URI is a scheme that allows embedding data directly in HTML or CSS using the format: data:[mime-type];base64,[encoded-data]. For images, this means the entire image is represented as a text string that can be placed directly in an img src attribute or CSS background-image.
When should I use base64 images?▼
Base64 encoding is best for small images (under 10KB) like icons and logos where eliminating an HTTP request improves performance. For larger images, regular files are more efficient because base64 encoding increases file size by about 33%.
What image formats are supported?▼
This tool supports PNG, JPEG, GIF, SVG, and WebP formats. The output data URI will include the correct MIME type for each format.
Is my image uploaded to a server?▼
No. All processing happens entirely in your browser using the FileReader API. Your image never leaves your machine.