Base64 Encoder & Decoder

Encode and decode Base64 strings.

About Base64 Encoder & Decoder

The Base64 Encoder & Decoder is a high-speed, client-side developer utility that converts plain text, Unicode strings, and binary sequences into standardized RFC 4648 Base64 representations and vice-versa. Operating entirely within browser memory, it guarantees zero network exposure and immediate bi-directional conversion.

Key features

• 100% In-Browser Privacy: All encoding and decoding operations run locally in browser memory without sending data to external servers
• Full UTF-8 & Unicode Support: Accurately encodes multi-byte Unicode characters, accented letters, and emojis without data loss
• Bi-Directional Conversion: Seamlessly toggle between Encode (Text to Base64) and Decode (Base64 to Text) modes with automatic live processing
• Instant Error Handling & Clipboard Copy: Visual validation immediately flags malformed Base64 strings with quick one-click copy

How to use

• Select Conversion Mode: Choose "Encode" to serialize plain text into Base64, or "Decode" to convert a Base64 string back into readable text.
• Enter or Paste Your Content: Type or paste your input into the source editor; the tool automatically processes and updates the output in real time.
• Copy the Converted Result: Review the generated result in the output panel and click "Copy" to copy the result to your clipboard.

FAQ

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