image to base64
Convert images to Base64 encoded strings for embedding.
An image to Base64 converter transforms image files into Base64 encoded strings for embedding in HTML, CSS, JSON, or other text-based formats. This tool is essential for web developers creating inline images, frontend developers optimizing asset loading, API developers transmitting image data, and anyone who needs to embed images without separate file dependencies. By converting images to Base64, you can reduce HTTP requests, embed images directly in code, and transmit images through text-based protocols. The tool processes images entirely in your browser, ensuring privacy and instant conversion without uploading files to external servers.
What is image to base64?
Image to Base64 conversion transforms binary image data into a text string using Base64 encoding. The resulting string can include a data URL prefix (data:image/format;base64,) that browsers recognize, allowing direct embedding in HTML or CSS. Base64 encoding increases file size by approximately 33%, but eliminates the need for separate image files and HTTP requests. This conversion is useful for small images, icons, or when embedding images directly in code. The tool supports common image formats including PNG, JPEG, GIF, and WebP, automatically detecting the format and generating the appropriate data URL.
Common use cases
- Web development: Embed small images, icons, or logos directly in HTML or CSS to reduce HTTP requests
- API development: Transmit image data in JSON responses using Base64 encoded strings
- Email templates: Embed images inline in HTML emails without external image hosting
- Mobile app development: Include small images in app code or configuration files
- Documentation: Embed screenshots or diagrams directly in markdown or documentation files
- Single-page applications: Bundle small images with code to reduce deployment complexity
Limitations and common mistakes
- Base64 encoding increases image file size by approximately 33%, making it inefficient for large images
- Very large images may cause browser performance issues or memory limitations during conversion
- Base64 encoded images cannot be cached separately by browsers, potentially affecting performance
- The tool is best suited for small images. Large images should use traditional file hosting for better performance
- Some older browsers or systems may have limitations on data URL length
How to use this image to base64
- Click "Select image to convert" and choose an image file from your device
- The image is automatically converted to Base64 and displayed with a preview
- Choose whether to include the data URL prefix (for direct HTML/CSS use) or exclude it (for just the Base64 string)
- View the Base64 encoded string and its character length
- Copy the Base64 string using the copy button for use in your projects
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Frequently Asked Questions
Why convert image to Base64?
Converting images to Base64 allows you to embed them directly in HTML, CSS, or JSON without separate image files. This reduces HTTP requests, enables inline embedding, and allows image transmission through text-based protocols.
Does file size increase?
Yes, Base64 encoding increases file size by approximately 33% because it converts binary data to text representation. The encoded string is larger than the original image file.
What is the data URL prefix?
The prefix (e.g., "data:image/png;base64,") tells browsers what type of data it is. Include it for direct use in HTML/CSS img tags or CSS background-image properties. Exclude it if you only need the Base64 string.
How do I use the Base64 string?
You can use it directly in HTML: <img src="data:image/png;base64,..." /> or in CSS: background-image: url("data:image/png;base64,..."). Make sure to include the data URL prefix when using in HTML or CSS.
What image formats are supported?
The tool supports all common image formats including PNG, JPEG, GIF, and WebP. The format is automatically detected from the uploaded file, and the appropriate MIME type is included in the data URL prefix.
Is my image data secure?
Yes, all conversion happens in your browser. Images are never uploaded to any server, stored anywhere, or transmitted over the network, ensuring complete privacy and security.