Base64 Encoder / Decoder

About Base64 Encoder / Decoder

A fast, browser-based Base64 encoder and decoder. Converts plain text to Base64 and back with full UTF-8 support, handles URL-safe Base64 variants, generates data URIs for embedding, and detects/validates Base64-encoded input automatically. All processing happens client-side — no data leaves your browser. Includes character count comparison showing the ~33% size overhead, and supports multiline input for large payloads. Essential for web developers, API integrators, email engineers, and anyone working with encoded data.

Base64 Encoder / Decoder Features

• Encode & decode
• UTF-8 safe
• URL-safe variant
• Auto-detection
• Data URI output