Base64 Image Encoder/Decoder
Convert images to Base64 data URIs or decode Base64 strings back to images
Drop your image here or click to browse
Supports PNG, JPG, GIF, SVG, WebP (Max 10MB)
Instant Conversion
Convert images to Base64 data URIs instantly in your browser with no server upload required.
100% Private
All image processing happens locally in your browser. Your images never leave your device.
Multiple Formats
Support for PNG, JPG, GIF, SVG, WebP and other common image formats up to 10MB.
About Base64 Image Encoding
Base64 image encoding converts image files into text strings that can be embedded directly in HTML, CSS, or other text-based formats. This creates data URIs that browsers can render without separate HTTP requests.
Common Use Cases:
- Embedding small images directly in HTML/CSS files
- Reducing HTTP requests for better page load performance
- Storing images in JSON or XML data
- Inline images in email templates
- Creating self-contained single-file web applications
- Displaying images in web APIs without hosting files
Important Considerations:
- Base64 encoding increases file size by approximately 33%
- Best for small images (<10KB) - larger images should use separate files
- Base64 images can't be cached separately by browsers like external images
- Not ideal for large images as it bloats HTML/CSS file sizes
- Some email clients may have size limits for data URIs
- Consider compression before encoding (use optimized PNG/JPG)
Data URI Format:
data:[MIME-TYPE];base64,[BASE64-DATA]Example: data:image/png;base64,iVBORw0KGgoAAAANSUhEUg...
How to Use
Encoding (Image → Base64):
Click "Encode Image to Base64" tab
Drag & drop an image or click to browse (PNG, JPG, GIF, SVG, WebP)
View the preview and copy the Base64 string or data URI
Use the provided HTML or CSS examples to embed in your code
Decoding (Base64 → Image):
Click "Decode Base64 to Image" tab
Paste a Base64 string or complete data URI
Click "Decode to Image" to view the preview
Download the image to save it to your device
Best Practices
✓ Good For:
- • Small icons and logos (<5KB)
- • Loading indicators and spinners
- • Email template images
- • SVG icons (often smaller when base64)
- • Single-file HTML documents
✗ Not Ideal For:
- • Large photographs
- • Images that change frequently
- • Images used on multiple pages
- • Performance-critical applications
- • Images needing browser caching
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