Unicode to UTF-16 Converter

All processing happens locally in your browser. No data is sent to any server.

About This Tool

The Unicode to UTF-16 converter transforms Unicode characters into their corresponding UTF-16 code units. It correctly handles surrogate pairs, ensuring accurate results for characters outside the Basic Multilingual Plane.

Key Benefits

• Instant conversion with zero latency
• Accurate handling of surrogate pairs
• Works entirely offline after page load
• No tracking, logging, or data storage
• Designed for global, multilingual usage

Features

• Clean, distraction-free light-mode interface
• Responsive and mobile-friendly layout
• Supports emojis, symbols, and rare scripts
• Readable hexadecimal UTF-16 output
• SEO-optimized and accessibility-aware structure

Use Cases

• Debugging text encoding issues
• Learning how UTF-16 represents Unicode
• Preparing encoded strings for low-level systems
• Validating emoji and surrogate pair behavior
• Educational demonstrations and documentation

Fun Fact

Emojis often require two UTF-16 code units, which is why a single visible character can sometimes have a string length greater than one.

Historical Context

UTF-16 emerged in the early days of Unicode when developers believed 16 bits would be sufficient for all characters. While Unicode has since expanded beyond that range, UTF-16 remains widely used in systems like Java, JavaScript, and Windows due to its balance between efficiency and backward compatibility.