Encode text to Base64 or decode Base64 to plain text online for free. Supports Unicode characters. Auto-detect mode, copy to clipboard. No signup required.
NuToolz Base64 Encoder / Decoder is a free, browser-based tool that encodes plain text to Base64 or decodes Base64 back to readable text. It supports Unicode characters and emojis via UTF-8 encoding. All processing happens locally in your browser — your data is never sent to any server.
Type or paste plain text to encode, or Base64 text to decode.
Click Encode to convert text to Base64, Decode to convert Base64 back to text, or Auto-Detect to let the tool decide.
Copy the output to your clipboard with one click.
Base64 is a binary-to-text encoding scheme that converts binary data into a set of 64 printable ASCII characters. It is commonly used to embed data in URLs, emails, and web pages.
Yes, the tool handles Unicode text by encoding it to UTF-8 first, ensuring emojis and non-ASCII characters are processed correctly.
No. All encoding and decoding happens entirely in your browser. Your data never leaves your device.
Yes, the tool is 100% free with no limits on the amount of text you can encode or decode. There are no hidden fees.
No. You can encode and decode Base64 text instantly without signing up or creating any account.
Yes, the tool is fully responsive and works on smartphones and tablets. Paste text and encode or decode it directly from your mobile browser.