Base64 Encoder / Decoder

What is Base64 Encoding?

Base64 is an encoding scheme that represents binary data using only 64 printable ASCII characters (A–Z, a–z, 0–9, plus + and /). It lets you safely transmit or store data — including text, images, and files — through channels that were designed for text, such as email, URLs, JSON, and HTML attributes.

Our Base64 Encoder / Decoder handles the full Unicode range by encoding text as UTF-8 before converting to Base64, so emoji, accented characters, and non-Latin scripts round-trip perfectly. This avoids the corruption that naive Base64 tools produce with international text.

How to Use the Tool

• Choose Encode to convert text into Base64, or Decode to convert Base64 back to text
• Type or paste your input — the result appears instantly in the output pane
• Use the Swap button to move the output back into the input and flip the mode
• Invalid Base64 input shows a clear error message instead of garbled output
• Click Copy to copy the result to your clipboard

Common Uses for Base64

Developers use Base64 to embed images directly in HTML and CSS as data URIs, to encode binary attachments in email (MIME), to store small files in JSON or databases, and to transmit credentials in HTTP Basic Authentication headers. It is also common in JSON Web Tokens and many APIs.

It is important to understand that Base64 is encoding, not encryption — it provides no security or secrecy. Anyone can decode Base64 instantly, as this tool demonstrates. Use it for safe data transport and representation, never to protect sensitive information.

Privacy

All encoding and decoding happens locally in your browser. Your data is never uploaded to a server, so the tool is safe to use even with private or sensitive content.