Turn plain text into a quoted JSON or JavaScript string, or decode a quoted literal back to text. Handle quotes, backslashes, controls and Unicode locally, without executing input.
| Notation | Meaning | Format |
|---|---|---|
\n · \r · \t · \b · \f | Line feed, carriage return, tab, backspace, form feed | JSON and JavaScript |
\\ · \" · \/ · \u0041 | Backslash, double quote, slash, Unicode unit | JSON and JavaScript |
\' · \v · \0 · \x41 · \u{1F30D} | Single quote, vertical tab, NUL, hex unit, Unicode code point | JavaScript only; \0 cannot precede a digit |
JavaScript modes reject identity escapes, legacy octal, line continuations, raw controls and raw U+2028/U+2029. Templates, concatenation and expressions are not accepted. Unpaired Unicode surrogates are rejected in every mode.
Your text is never uploaded to any server; all processing is completed locally in your browser. The tool does not execute input or store text history. Format-specific checks help catch malformed escape sequences before you copy the result.
Yes. Escape produces one complete quoted string: double quotes for JSON and the selected quote style for JavaScript. Unescape requires those quotes and rejects surrounding whitespace. To escape text that already contains quotes, paste them as ordinary text; they are part of the content.
The supported subset includes escaped quotes, backslash and slash; b, f, n, r, t and v controls; NUL as backslash-zero when no digit follows; two-digit hex escapes; four-digit Unicode escapes; and braced Unicode code points with 1–6 hex digits up to 10FFFF. Identity escapes, legacy octal, line continuations, raw controls and raw U+2028/U+2029 are rejected. Templates, expressions and concatenation are not supported.
JSON mode uses a complete double-quoted JSON string and JSON escape rules. JavaScript-specific forms such as single-quoted literals, hex escapes, braced Unicode escapes and vertical-tab shorthand are not JSON. Unescape decodes one layer only: an escaped backslash followed by n remains backslash plus n, rather than becoming a newline.
Valid Unicode characters are preserved by default. ASCII-only escape output uses four-digit Unicode units, including surrogate pairs for supplementary characters such as emoji. Unpaired surrogates are rejected before and after conversion. Escaping always writes controls, DEL, U+2028/U+2029 and less-than, greater-than and ampersand as explicit escapes. Counts are UTF-16 units, not visual characters. Textarea input follows the browser’s line-ending normalization.
No. String escaping is context-specific and does not replace HTML, URL, SQL or regular-expression encoding. The output is a string literal, not a full program. Input is never evaluated, and decoded text is displayed as plain text, including anything that resembles markup.
Escape accepts up to 100,000 UTF-16 units; unescape accepts up to 600,010. Output is limited to 600,010 units. Empty text escapes to an empty quoted literal, and an empty quoted literal decodes to empty text. Errors produce no partial output. Downloads are UTF-8 TXT files containing only the result, without an added newline.
