The developer tools you reach for every day, all in one place.

Converters, formatters, hashes, validators, and the small utilities you keep reopening stay together instead of getting lost across tabs.

GitHub

/ Tools

■

/ Tool Finder

109 tools

/ Unicode Escape Encoder

Escape Format

JavaScript (\uXXXX)

Encode all characters (including ASCII)

Text Input

/ Selected Tool

Unicode Escape Encoder

Convert text to and from Unicode escape sequences

■ 01

What are Unicode Escape Sequences?

Unicode escape sequences are a way to represent Unicode characters using ASCII characters. They are commonly used in programming languages and markup languages to include special characters that might not be directly ty…

■ 02

How does it work?

Supported Formats JavaScript: Uses \uXXXX for BMP characters. Surrogate pairs for characters above U+FFFF. Python: Uses \uXXXX for BMP and \UXXXXXXXX for extended characters. CSS: Uses \XXXX followed by a space. HTML: U…

■ 03

Sample Cases

Covers JavaScript format, HTML entities, and CSS escapes so you can compare common inputs and outputs quickly.

/ Code

■

/ Integration

Source code from the selected tool, shown here alongside the live version on the right.

/ Source Code

TypeScript

typescript

// Unicode escape encoding in different formats

function toJavaScriptEscape(text: string): string {
  return Array.from(text)
    .map(char => {
      const cp = char.codePointAt(0)!;
      if (cp <= 0xFFFF) {
        return `\\u${cp.toString(16).padStart(4, '0')}`;
      }
      // Surrogate pairs for characters outside BMP