Upload Image
Supports JPG, PNG, GIF, WebP
최대 10MB
Usage Examples
- • CSS: background-image: url(data:image/png;base64,...);
- • HTML: <img src="data:image/png;base64,..." />
- • JSON: Store/transmit images as text
🖼️ What is Base64 Image Converter?
Base64 Image Converter encodes image files to text strings or decodes Base64 strings back to images. Base64-encoded images can be embedded directly in HTML, CSS, or JavaScript code, eliminating external file dependencies. Widely used for email templates, single-file HTML distribution, and API data transmission. All processing happens in your browser, so images never leave your device - completely safe and private.
📋 Image Format Base64 Signatures
| Format | MIME Type | Base64 Start |
|---|---|---|
| JPEG | image/jpeg | /9j/ |
| PNG | image/png | iVBOR |
| GIF | image/gif | R0lGOD |
| WebP | image/webp | UklGR |
💡 Base64 Image Tips
- Best for small images: Recommended for icons and logos under 10KB
- Data URL prefix: data:image/... format required for CSS/HTML usage
- Size increase: Base64 encoding adds about 33% to original size
- No caching: Inline images cannot be browser-cached, causing repeated downloads
- Email embedding: Useful for embedding images directly in HTML emails
Frequently Asked Questions
Does Base64 encoding make images larger?▼
Yes, Base64 converts binary to text, increasing size by about 33%. Best suited for small images.
When is the Data URL prefix needed?▼
For HTML img src or CSS background-image, you need the data:image/...;base64, prefix. API transmission may use pure Base64.
Can you detect image format from Base64?▼
Yes, the starting characters indicate the format. This tool auto-detects signatures like /9j/ (JPEG) and iVBOR (PNG).
What is Base64 Image Converter?
Convert images to Base64-encoded data URIs for embedding directly in HTML, CSS, or JSON. Also decode Base64 strings back to image files.