Unicode Escape / Unescape

Overview

• Converts non-ASCII characters, such as Japanese text or emoji, into \uXXXX escape sequences as used in JavaScript string literals (escape), or restores them back to the original characters (unescape).
• ASCII characters with a code point below 0x80 (letters, digits, basic symbols) are left as-is; only other characters are converted.
• Characters that need a UTF-16 surrogate pair, such as emoji, are correctly split into and recombined from two \uXXXX sequences.

Usage

1. Enter the text you want to escape, or the \uXXXX-encoded string you want to unescape, into the text area.
2. Click the "Escape" or "Unescape" button.
3. The result is displayed below.

Example

Hello世界

Hello\u4e16\u754c

Use Cases

• Converting non-ASCII characters into escape sequences for embedding in JSON or JavaScript source code
• Decoding a \uXXXX-formatted string output by another system or log to check the original Japanese text or emoji
• Checking a specific character's Unicode code point for learning or reference purposes

FAQ

Notes

• ASCII characters (code point below 0x80) are not escaped. Only non-ASCII characters, such as Japanese text or emoji, are converted to \uXXXX notation.
• A character requiring a surrogate pair, such as an emoji, is split into two \uXXXX sequences. Taking only one of them will not decode correctly.
• The entered text exists only on the page and is lost on reload.