About Image to Base64 Converter
Base64 is an encoding scheme that converts binary image data into ASCII text characters. This allows images to be embedded directly into HTML, CSS, JSON and other text-based formats without needing a separate file URL.
Common uses include embedding small icons and logos directly in HTML files, CSS background images without separate HTTP requests, email template images, and sending images in JSON API payloads. Base64 increases file size by about 33% compared to the original.
Updated: March 2025 ยท Max 5MB input ยท Supports all image formats ยท Instant conversion
Frequently Asked Questions
What is Base64 image encoding?+
Base64 converts binary image data to text characters (A-Z, a-z, 0-9, +, /). This lets you embed images directly in HTML/CSS without a separate image file URL.
Should I use Base64 for all images?+
Only for small images (under 5KB) like icons and logos. Large Base64 images increase HTML/CSS file size significantly and are not cached by browsers separately.
How do I use the Base64 in my website?+
Copy the Data URI output and paste directly as the src attribute of an img tag: img src="data:image/png;base64,...". Choose HTML format for a ready-to-use img tag.
Is there a size limit?+
Max 5MB input. Base64 output is about 33% larger โ a 5MB image becomes roughly 6.7MB of text. Use only for small images in practice.
Is the conversion private?+
Yes. Everything happens in your browser using FileReader API. Your image is never sent to any server.