Free tools
Base64 Image Encoder
Free online Base64 image encoder — convert any image to a Base64 string. Supports PNG, JPG, WebP, and GIF. 100% private browser-based processing.
Drag & drop your image here
or click to choose a file
Supports PNG, JPG, WebP, GIF • Max 10MB • 100% private
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Base64 Image Encoder Online
Convert any image to Base64 format instantly. Simply upload your image and get the Base64-encoded string that you can use in HTML, CSS, JSON, or any text-based format. Perfect for embedding small images directly in your code.
What Is Base64 Image Encoding?
Base64 image encoding converts binary image data into a text string using 64 ASCII characters. This allows images to be embedded directly in text-based formats like HTML, CSS, JSON, and XML. The encoded string starts with data:image/[format];base64, followed by the actual Base64 data.
Common Use Cases
- Embed images in HTML/CSS: Reduce HTTP requests by embedding small images directly in your code
- API responses: Include images in JSON API payloads
- Email templates: Embed images in HTML emails
- Database storage: Store small images as text in databases
- Documentation: Include images in Markdown or code documentation
How to Use This Tool
- Drag and drop your image or click to upload
- The tool instantly converts your image to Base64
- Copy the Base64 string or download it as a file
- Use the HTML Data URI format to embed directly in your code
Supported Image Formats
| Format | MIME Type | Best For |
|---|---|---|
| PNG | image/png | Graphics with transparency |
| JPG/JPEG | image/jpeg | Photographs |
| WebP | image/webp | Modern web images |
| GIF | image/gif | Simple animations |
Everything runs in your browser — your images are never sent to any server.
Frequently Asked Questions
How do I convert an image to Base64?
Simply drag and drop your image or click to upload. The tool will instantly convert your image to a Base64 string. You can then copy the result or download it as a text file. The entire process happens in your browser — your image never leaves your device.
What is Base64 image encoding?
Base64 image encoding converts binary image data into a text string using 64 ASCII characters. This allows images to be embedded directly in HTML, CSS, JSON, or other text-based formats. The encoded string starts with
data:image/[format];base64, followed by the Base64 data.Why would I encode an image to Base64?
Common use cases include: embedding small images directly in HTML/CSS to reduce HTTP requests, including images in JSON API responses, encoding images for data URIs in emails, storing images in databases as text, and sharing images in code snippets or documentation.
What image formats are supported?
The tool supports all major image formats: PNG, JPG/JPEG, WebP, GIF, BMP, and TIFF. The output will preserve the original format by default, or you can choose a different format if needed.
Does Base64 encoding make images larger?
Yes, Base64 encoding increases file size by approximately 33%. Every 3 bytes of binary data become 4 bytes of Base64 text. This is the trade-off for making binary data transportable through text-only systems. For this reason, Base64 is best for small images (under 50KB).
Is my image data secure?
Yes. All encoding happens entirely in your browser using JavaScript. Your images are never uploaded to any server. This ensures complete privacy and security for your sensitive images, personal photos, and confidential screenshots.
How do I use the Base64 string in HTML?
You can use the Base64 string directly as an image source:
<img src="data:image/png;base64,iVBORw0KGgo..." alt="My Image">. This works in all modern browsers and eliminates the need for a separate image file.