Encode text to Base64 or Decode Base64 to text instantly. Supports Unicode and Emojis.
Base64 encoding shows up constantly in web development, from embedding small images in CSS to safely transmitting binary data through text-based protocols like JSON and XML, yet manually encoding or decoding it usually means writing a quick script just to test a single string. Our Base64 Encoder / Decoder eliminates that detour entirely, converting text to Base64 or decoding Base64 back to readable text instantly, right inside your browser. Since this Base64 Encoder / Decoder processes everything locally, sensitive tokens, credentials, or payloads are never transmitted to an external server.
Using the Base64 Encoder / Decoder starts with selecting your direction using the two mode tabs at the top: Encode to Base64 or Decode from Base64. Once you've picked a mode, simply type or paste your content into the input box on the left, and the conversion happens automatically and instantly in the output panel on the right, with no separate "convert" button to click and no waiting for results to appear.
What makes this Base64 Encoder / Decoder particularly reliable compared to many basic online converters is its full support for Unicode characters and emojis. Many simple Base64 tools break or produce garbled output when given non-ASCII text, special characters, or emoji, but this encoder correctly handles the full UTF-8 character range, so international text, accented characters, and emoji all encode and decode accurately without corruption.
Switching between modes is seamless too: if you have a result in the output panel and switch from encoding to decoding (or vice versa), the tool intelligently carries that output over into the input field, letting you quickly verify a round-trip conversion or chain operations together without manually copying and pasting between fields. If you paste invalid Base64 data while in decode mode, the tool clearly flags the error rather than silently producing corrupted or nonsensical output, helping you immediately recognize when your input string isn't actually valid Base64.
Once you have your result, a single click copies it directly to your clipboard, ready to paste into your code, API request, or configuration file. Because this Base64 Encoder / Decoder runs entirely through native browser JavaScript, there's no signup, no file size restrictions, and no processing delay regardless of input length. It's a genuinely practical utility for developers, API testers, and anyone who occasionally needs to quickly encode or decode Base64 strings without spinning up a script, completely free.