Base64 Encoder & Decoder

Encode plain text or UTF-8 strings to Base64 or decode Base64 data with instant client-side privacy.

Plain Text Input

Base64 Output

SGVsbG8gV29ybGQh

About this tool

What can the Base64 Encoder & Decoder do?

Encode text strings into Base64 or decode Base64 strings back to plain readable text directly in your browser. Features full UTF-8 Unicode support, emoji handling, character validation, and live length metrics.

UTF-8 and Unicode-safe encoding (accents, international symbols, emojis)
Strict Base64 validation with informative syntax error indicators
Live byte length and compression expansion ratio metrics
One-click clipboard copy and input clearing
100% private in-browser processing with zero cloud logging

How to use the Base64 Encoder & Decoder

1
Select Encode mode to convert text to Base64, or Decode mode to convert Base64 to text.
2
Paste your source payload into the input box.
3
Copy the converted result immediately.

Frequently Asked Questions

Does this Base64 tool support non-English characters and emojis?

Yes! Unlike standard JavaScript `btoa`/`atob` functions that crash on multi-byte characters, ToolZappy uses UTF-8 byte stream encoding to handle emojis (🚀, 😊), accented Latin characters, Arabic, Cyrillic, and Asian scripts smoothly.

Is Base64 considered encryption?

No. Base64 is a binary-to-text encoding format designed to transmit binary data safely over text-based protocols (like email MIME or JSON APIs). It provides zero cryptographic security or privacy on its own.

Are my encoded strings uploaded or stored anywhere?

No. Everything processes locally in your browser memory. No text or tokens are ever sent across the network.