Free Toolkit

Unicode EscapeConvert text to Unicode escape sequences (\uXXXX format).

Unicode Escape illustration
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Unicode Escape

Convert text to Unicode escape sequences (\uXXXX format).

How to Use
1

Enter Text

Type or paste the text to convert.

2

View Escaped Output

Unicode escape sequences appear instantly.

3

Copy Result

Click Copy to copy the escape sequences.

What Is Unicode Escape?

Unicode escaping converts characters to their \uXXXX escape sequence representation, where XXXX is the 4-digit hexadecimal Unicode code point. Characters outside the Basic Multilingual Plane (above U+FFFF) use surrogate pairs. This format is used in JavaScript, JSON, Java, C#, and Python strings. ASCII characters are typically left unescaped for readability. This tool converts all non-ASCII characters to escape sequences while preserving ASCII. All processing is client-side.

Why Use Our Unicode Escape?

  • Convert any text to universal \uXXXX escape sequences
  • Handles surrogate pairs for emoji and supplementary characters
  • 100% client-side — data never leaves your browser
  • Compatible with JavaScript, JSON, Java, C#, and Python

Common Use Cases

Source Code

Embed international text in source code using escape sequences.

JSON Data

Escape non-ASCII characters in JSON strings.

Configuration

Represent Unicode in ASCII-only configuration files.

Debugging

Inspect exact code points of Unicode characters.

Technical Guide

Each character's code point is obtained via charCodeAt() and formatted as \uXXXX with zero-padded 4-digit hex. For supplementary characters (U+10000+), JavaScript uses UTF-16 surrogate pairs. Modern JavaScript also supports \u{XXXXX} syntax for code points above U+FFFF.

Tips & Best Practices

  • 1
    ASCII characters (32-126) are preserved for readability
  • 2
    Emoji use surrogate pairs in \uXXXX format
  • 3
    Output is valid in JavaScript, JSON, Java, and C# strings
  • 4
    Use \u{XXXXX} in modern JavaScript to avoid surrogate pairs

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Frequently Asked Questions

QIs this tool free?
Yes, completely free with no signup required.
QIs my data secure?
Yes. All processing is 100% client-side.
QWhat are surrogate pairs?
Characters above U+FFFF are encoded as two \uXXXX sequences in UTF-16.
QWhat browsers are supported?
All modern browsers including Chrome, Firefox, Safari, and Edge.
QWhich languages support this format?
JavaScript, JSON, Java, C#, Python, and many others.

About Unicode Escape

Unicode Escape is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.