Image to Base64 Converter
Convert any image into a Base64-encoded data URI string, ready to paste directly into HTML, CSS or JSON. Encoding happens entirely in your browser.
How to Use the Image to Base64 Converter
- Click "Select an Image" and choose the file you want to encode.
- The full Base64 data URI appears instantly in the output box below the preview.
- Click "Copy Base64 String" to copy it to your clipboard.
- Paste the string into your HTML `src` attribute, CSS `url()`, or JSON payload as needed.
Why Use This Tool?
Is my image uploaded to a server to be encoded?
No. Base64 encoding happens entirely inside your browser using the FileReader API — your image is read directly from your device's memory and converted to text locally. It is never transmitted anywhere, so it's safe to use even for private or sensitive images.
What is a Base64 data URI, and why would I need one?
A data URI embeds the full image data directly inside a string (like `data:image/png;base64,...`), so you can use it as an image source without hosting a separate file. Developers commonly use this to inline small icons or images directly into HTML, CSS or JSON to avoid an extra network request.
Does Base64 encoding increase file size?
Yes — Base64 encoding typically increases the effective size by around 33% compared to the original binary file, since it represents binary data using only text-safe characters. It's best suited for small images like icons and logos rather than large photos.
Can I convert a Base64 string back into an image file?
Yes — use our Base64 to Image Converter tool, which takes a pasted Base64 string or data URI and turns it back into a downloadable image file.