Formula & Calculator
UTF-16 Converter
The UTF-16 Converter is a tool that allows you to convert text to and from UTF-16 encoding. UTF-16 is a character encoding that uses either 2 or 4 bytes per character, depending on the code point. It is widely used in many operating systems, programming languages, and applications, especially for handling text in languages with large character sets (like Chinese, Japanese, and Korean). This converter takes your text and shows you the UTF-16 byte sequence (in hex or binary), and can also decode UTF-16 data back into text. It is invaluable for developers who work with system APIs, databases, or file formats that require UTF-16 encoding. With this tool, you can easily inspect how your text is represented in UTF-16 and ensure that your data is correctly encoded for its intended use.
UTF‑16 Encoding Steps
0 characters| # | Character | Code Point | UTF‑16 (BE) | UTF‑16 (LE) |
|---|---|---|---|---|
| Enter text to see UTF‑16 encoding steps | ||||
| Char | Code Point | UTF‑16 BE | UTF‑16 LE |
|---|
Interpretation
When you convert text to UTF-16, you are translating characters into 2‑ or 4‑byte sequences. Characters in the Basic Multilingual Plane (BMP) are encoded with a single 16‑bit unit, while characters outside the BMP (like many emojis) require a surrogate pair. This encoding is widely used in Java, .NET, and Windows. The UTF-16 Converter makes it easy to encode and decode UTF‑16 data, helping you work with text in various computing environments.
Variables
| Symbol | Quantity | Unit |
|---|---|---|
| Text Input | Text | String |
| UTF-16 Output | UTF-16 Encoded Data | Bytes |
What it means
UTF-16 is a variable‑length encoding system that uses one or two 16‑bit code units to represent Unicode characters. It is commonly used in many programming environments.
Worked example
Example 1 – Encode English Text Using UTF-16
Educational Example| Parameter | Value |
|---|---|
| Input Text | Hello |
| Encoding Standard | UTF-16 |
| Bytes per Character | 2 Bytes |
Example 2 – Encode an Emoji Using Surrogate Pairs
Unicode Example| Parameter | Value |
|---|---|
| Input Text | 😊 |
| Unicode Code Point | U+1F60A |
| Encoding Method | Surrogate Pair |
Example 3 – Store Multilingual Text in a Database
Real-World Example| Parameter | Value |
|---|---|
| Input Text | Hello 世界 |
| Encoding Standard | UTF-16 |
| Supports | Multilingual Unicode Text |
Common mistakes
- Assuming that UTF-16 is the same as UTF-8 – they are different.
- Forgetting about byte order (endianness) – UTF-16 can be big‑endian or little‑endian.
- Not handling surrogate pairs correctly for characters above U+FFFF.
- Confusing UTF-16 with UCS-2.
- Using the wrong encoding for the input text, causing errors.
- Not specifying the byte order when decoding.
Applications
- Encode text for applications that use UTF-16 (e.g., Windows, Java, C#).
- Decode UTF-16 data from files or network streams.
- Handle multilingual text with large character sets.
- Debug encoding issues in software.
- Work with legacy systems that rely on UTF-16.
- Learn about Unicode encoding schemes.
UTF-16 Encoding Reference
Frequently Asked Questions
A UTF-16 Converter is a tool that encodes text into UTF-16 byte sequences and decodes UTF-16 encoded data back into readable text. It helps developers inspect how Unicode characters are represented using UTF-16 encoding.
UTF-16 is a Unicode character encoding standard that represents characters using either 2 or 4 bytes. It efficiently supports multilingual text and is commonly used in operating systems, programming languages, and file formats.
UTF-8 uses one to four bytes per character, UTF-16 uses two or four bytes, and UTF-32 always uses four bytes. UTF-16 provides a balance between storage efficiency and Unicode compatibility.
UTF-16 is widely used because it efficiently represents many commonly used characters while providing full Unicode support. It is used internally by platforms such as Windows and programming environments like Java and JavaScript.
Yes. UTF-16 supports every Unicode character, including emojis and multilingual text. Characters outside the Basic Multilingual Plane are represented using surrogate pairs.
Surrogate pairs are two 16-bit code units used together to represent Unicode characters that cannot fit within a single 16-bit value. Many emojis and less common symbols use surrogate pairs in UTF-16.
Yes. UTF-16 encodes emojis using surrogate pairs, allowing it to represent all Unicode emoji characters accurately.
UTF-16LE stores bytes in little-endian order, whereas UTF-16BE uses big-endian order. Some systems also include a Byte Order Mark (BOM) to indicate which byte order is being used.
UTF-16 is used in Windows APIs, Java applications, JavaScript strings, XML documents, database systems, and various software development environments.
Yes. UTF-16 encoded byte sequences can be accurately decoded into their original Unicode text representation.
Yes. UTF-16 generally uses less memory than UTF-32 because most common characters require only two bytes instead of four.
Yes. UTF-16 fully supports multilingual text, including Chinese, Japanese, Korean, Arabic, and thousands of other Unicode characters.
Characters outside the Basic Multilingual Plane require surrogate pairs, which occupy four bytes in UTF-16 encoding.
A Byte Order Mark is a special Unicode character placed at the beginning of a UTF-16 file to indicate whether the data uses little-endian or big-endian byte order.
The easiest method is to use a UTF-16 Converter, which instantly displays UTF-16 encoded byte sequences and converts them back into readable Unicode text.