Convert Text to Base64 Online
Base64 encoding converts text or binary data into a safe ASCII-only representation, making it suitable for transmission through systems that only handle printable characters. This is essential when embedding data in JSON payloads, HTML data attributes, HTTP headers, or URL parameters. This tool encodes any text string to its Base64 representation, correctly handling the full Unicode character range by first encoding your input to UTF-8 bytes and then applying Base64 encoding. It also outputs the URL-safe Base64 variant alongside the standard form. Whether you are building an API integration, constructing authorization headers, or embedding text data in a web page, this converter gives you the correct encoded output instantly without requiring any server round-trip. The result is ready to paste directly into your code or configuration.
FAQ
- Why encode text to Base64?
- Base64 encoding is used to safely include text in JSON, embed data in URLs, store text in systems that only support ASCII, prepare data for HTTP Basic Auth headers, and transmit data through text-only protocols like email.
- How much larger is Base64 output?
- Base64 encoding increases size by approximately 33%. Every 3 bytes of input become 4 Base64 characters, plus possible = padding characters at the end.
- Does this handle emoji and special characters?
- Yes. The encoder first converts text to UTF-8 bytes, then encodes those bytes to Base64, correctly handling all Unicode characters including emoji and accented letters.