Convert any image file to Base64 encoding with this free online tool. Base64 encoding is commonly used to embed images directly in HTML, CSS, and JavaScript without separate image file requests. This is useful for small icons, email templates, and reducing HTTP requests. The tool supports all common image formats including PNG, JPG, GIF, WebP, SVG, ICO, and BMP.
Frequently Asked Questions
What is Base64 image encoding?
Base64 is a binary-to-text encoding scheme that converts binary data (like images) into ASCII text characters. When an image is encoded in Base64, it can be embedded directly in HTML, CSS, or JavaScript as a data URI, eliminating the need for a separate HTTP request to load the image.
When should I use Base64 images?
Use Base64 for small images (under 5-10KB) where the HTTP request overhead would be significant. Good use cases include small icons in email templates (which cannot reference external URLs), inline SVG icons, loading spinners, and images that are always needed on page load. Avoid Base64 for large images as it increases file size by ~33%.
How does Base64 affect performance?
Base64 encoding increases file size by approximately 33% compared to the original binary. This means larger CSS/HTML files that take longer to download, but eliminates separate image HTTP requests. For large images, the trade-off is negative. For small icons used on every page load, embedding as Base64 can improve performance by reducing round-trip requests.
How do I use a Base64 image in HTML?
You can use a Base64 encoded image in an img tag: <img src="data:image/png;base64,iVBORw0KG..." alt="description">. In CSS: background-image: url("data:image/png;base64,iVBORw0KG..."). The data URI includes the MIME type and the Base64 encoded binary data.
Are my images processed on the server?
No, this tool performs all image conversion entirely in your browser using the FileReader API and Canvas API. Your images are never uploaded to any server, ensuring your privacy and security. The conversion happens locally on your device.