Base64 Image Converter Online | Image to Base64 Encoder Decoder
Convert images to Base64 encoding and decode Base64 strings back to images with our free online Base64 image converter tool. Upload an image file to get its Base64 representation, or input a Base64 image string to view and download the original image. Perfect for developers working with data URIs and image embedding.
Base64 Image Converter
Upload Image to Convert to Base64
Tool Features
- Convert images to Base64 encoded strings instantly
- Decode Base64 strings back to downloadable images
- Support for all common image formats (JPEG, PNG, GIF, WebP, SVG)
- Real-time preview of converted images
- Copy Base64 strings to clipboard with one click
- Download decoded images directly to your device
- No file size limits for conversions
- Secure client-side processing - no data sent to servers
User Guide
Converting Image to Base64:
- Click "Choose Image" to select an image file from your device
- The tool will automatically convert the image to Base64 format
- View the image preview to confirm the conversion
- Copy the Base64 string using the "Copy to Clipboard" button
- Use the Base64 string in your HTML, CSS, or JavaScript code
Converting Base64 to Image:
- Click "Switch to Image View Mode" to change conversion direction
- Paste your Base64 image string in the text area
- The tool will automatically decode and display the image preview
- Click "Download Image" to save the decoded image to your device
- The downloaded image will retain its original format and quality
Formula
- Image to Base64: Binary Image Data → Base64 Encoding → Data URI String
- Base64 to Image: Data URI String → Base64 Decoding → Binary Image Data
- Data URI Format: data:image/[format];base64,[encoded-data]
Technical Details
- Character Set: Base64 uses 64 characters (A-Z, a-z, 0-9, +, /) plus padding (=)
- Encoding Ratio: Base64 increases file size by approximately 33%
- MIME Types: Supports image/jpeg, image/png, image/gif, image/webp, image/svg+xml
- Browser Support: Works in all modern browsers with HTML5 support
Typical Use Cases
Web Development
- Embedding small images directly in HTML/CSS
- Creating single-file web applications
- Reducing HTTP requests for small assets
- Working with Content Security Policy restrictions
API Development
- Transmitting images through JSON APIs
- Storing images in NoSQL databases
- Email template image embedding
- Mobile app data synchronization
Job Roles That Benefit
Frontend Developers
Use Base64 images for icons, small graphics, and embedded assets in single-page applications and progressive web apps.
Backend Developers
Handle image data in APIs, store images in databases, and process image uploads in web applications.
Email Developers
Embed images directly in email templates to ensure consistent display across different email clients.