Encode and Decode Base64

💡 About This Tool

Convert text to Base64 or decode strings back to plain text instantly. This tool is essential for generating Basic Auth headers, debugging encoded payloads, or handling binary data within text-based protocols.

📘 Key Features

• Handle UTF-8 Characters Avoid garbled text. This tool correctly processes multi-byte characters, including emojis and non-Latin scripts, using proper URI component encoding.
• Process Locally Prioritize security. All encoding and decoding happens client-side in your browser, ensuring sensitive tokens or credentials are never transmitted to a server.
• Toggle Instantly Switch between encoding and decoding modes without a page reload for a seamless workflow.

🧐 Frequently Asked Questions

What is Base64?

Base64 is a binary-to-text encoding scheme that represents binary data as an ASCII string (using A-Z, a-z, 0-9, +, and /). It is the standard for Data URIs and transmitting data over media that only support text.

Why do some strings end with "="?

Base64 processes data in 4-character blocks. If your input doesn't fill a complete block, the encoder adds "=" characters as "padding" to ensure the final string is the correct length.

📚 Technical Note

Base64 encoding increases data size by approximately 33%. While it is highly effective for embedding small assets to reduce HTTP requests, avoid using it for large files to maintain optimal performance.