Are my files uploaded to a server?

No! Whether you are encoding text or converting a large image to Base64, the entire process happens 100% locally inside your web browser using JavaScript's FileReader API.

What is a Base64 Data URI?

A Data URI is a Base64 string that includes a media type prefix (like data:image/png;base64,...). It allows developers to embed images or fonts directly into HTML or CSS files without needing an external file link.

Does this support Emojis and UTF-8?

Yes. Unlike basic tools that crash when trying to encode or decode accents or emojis, our tool safely parses full UTF-8 encoded text.

Base64 Encoder & Decoder (Text & Files)

About Base64 Encoding

Data URIs

Base64 is incredibly useful for frontend developers. By encoding a small image or icon into a Base64 Data URI, you can paste it directly into your HTML or CSS, saving an HTTP request and speeding up your website.

100% Client-Side Privacy

Converting files to Base64 can involve sensitive data. Our tool processes everything locally in your browser using the HTML5 FileReader API. Your text and files are never uploaded to a server.

Frequently Asked Questions

Is Base64 an encryption method?

No! Base64 is an encoding scheme, not encryption. It simply translates binary data into a readable text format. Anyone can easily decode a Base64 string back to its original state. Do not use it to hide passwords.

Does Base64 increase file size?

Yes. Encoding a file to Base64 generally increases its file size by about 33%. This is why you should only encode small assets (like SVG icons or tiny JPGs) directly into your code.

What happens if I try to decode invalid Base64?

If the string contains invalid characters, is missing padding, or isn't formatted properly, our tool will catch the error and display a red warning message rather than crashing.