Base64 is a method of encoding binary data using 64 printable characters. It is commonly used to transmit binary data over text protocols, such as embedding images in web pages or email attachments. The size of Base64 encoded data is approximately 4/3 of the original data size.
When to use Base64 images?
Suitable for small icons, logos, simple graphics, and other small-sized images. The advantage is reducing HTTP requests and improving page loading speed. Not suitable for large images as it increases file size and affects caching efficiency. Recommended file size is under 10KB.
1. Click the upload area or drag image files to the upload area
2. Supports uploading multiple files at once (up to 20)
3. Select the image to view on the conversion results page
4. Choose the appropriate copy format (Data URI, CSS, HTML, etc.)
5. Click the copy button to get the result
Performance optimization tips
• Use Base64 only for small images (< 10KB)
• Avoid using Base64 for frequently changing images
• Consider using WebP format to reduce file size
• Consider code splitting when using in CSS
• For repeatedly used images, prioritize traditional image files
All processing in this tool is done locally in your browser, and image data is not uploaded to any server. Base64 encoding is not encryption, and anyone can decode and view the original image. If handling sensitive images, please ensure to use in a secure environment.
Frequently asked questions
Q: Why does the file size increase after conversion?
A: Base64 encoding increases the file size by approximately 33%, which is normal.
Q: What image formats are supported?
A: Supports JPG, PNG, GIF, WebP, and SVG formats.
Q: Is there a file size limit?
A: Maximum single file size is 10MB, but images under 1MB are recommended for the best experience.