Free Online Base64 Image Encoder and Decoder
Convert images to Base64 strings or decode Base64 back to images with HubKit's Base64 Image tool. Base64-encoded images can be embedded directly in HTML, CSS, or JSON without separate file requests, reducing HTTP round-trips and simplifying asset delivery for small images.
How to Use
To encode, drop an image file onto the upload area or click to browse. The tool generates the Base64 string and a ready-to-use data URI. To decode, paste a Base64-encoded image string and see the image preview instantly.
Features
- Encode PNG, JPEG, GIF, WebP, and SVG to Base64
- Decode Base64 strings to image preview
- Generate ready-to-use data URI strings
- Display image metadata (size, dimensions, MIME type)
Frequently Asked Questions
When should I use Base64 images instead of regular files?
Base64 images are best for small icons, logos, and UI elements (under 10 KB). They eliminate extra HTTP requests. For larger images, regular files with proper caching are more efficient.
How much larger is a Base64-encoded image?
Base64 encoding increases the data size by approximately 33%. A 10 KB image becomes about 13.3 KB when Base64-encoded.
Can I use Base64 images in CSS?
Yes. Use a data URI in your CSS: background-image: url(data:image/png;base64,...). This is common for small background patterns and icons.