Image to Base64
Upload any image and instantly get its Base64 encoded string, ready to embed directly in HTML, CSS, or any data URI.
JPEG & PNG support
HTML, CSS & raw output
Instant conversion
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About Image to Base64
What Is an Image to Base64 Converter?
This tool encodes an image file into a Base64 text string, useful for embedding small images directly into HTML, CSS, or JSON without a separate file request — convenient for small icons or inline assets.
How to Use This Tool
- Upload your image file
- Click Convert
- Copy the resulting Base64 string
Key Features
- Supports common image formats
- Ready-to-embed output — usable directly in CSS or HTML
Who Uses This Tool
Developers embedding small icons or images directly in code. Anyone needing to transmit image data as text (e.g. in a JSON payload).
Frequently Asked Questions
Does Base64 encoding increase file size?
Yes, typically by around 33% — it's a tradeoff worth making only for small assets where avoiding an extra file request matters more than the size increase.
Is this tool free?
Yes, converting images to Base64 is completely free.
Frequently Asked Questions
What is Base64 encoding?
Base64 is an encoding scheme that converts binary data (like an image file) into a text string using 64 printable ASCII characters. This lets you embed image data directly in HTML or CSS without a separate file request, useful for small images and icons.
When should I use Base64 images?
Base64 is best for small images like icons, inline sprites, or email templates where you can't reference external files. For large images, using a URL is better since Base64 strings are ~33% larger than the original binary and can't be cached separately by the browser.
How do I use the HTML output?
Copy the HTML output and paste it directly into your HTML. The
<img> tag includes the full data URI so no external file reference is needed. The CSS background output works the same way in your stylesheet.Is there a file size limit?
Yes — the maximum file size is 2MB per image. Very large Base64 strings can slow down page load since they can't be cached. For best results, optimize your image first using the Image Optimizer tool before converting to Base64.