Convert tools

Escape Regex Metacharacters

Escape regular-expression metacharacters so text can be used as a literal pattern.

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Produces a standalone JavaScript regex source fragment, not a full /pattern/ literal. Does not execute expressions or replace the full RegExp.escape specification.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Escape regular-expression metacharacters so text can be used as a literal pattern.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

a+b?. → a\+b\?\.

Details and limitations

Produces a standalone JavaScript regex source fragment, not a full /pattern/ literal. Does not execute expressions or replace the full RegExp.escape specification.

Text stays in your browser; it is not sent to a conversion server.

FAQ

Escape Regex Metacharacters — What are the supported inputs and limits?

Produces a standalone JavaScript regex source fragment, not a full /pattern/ literal. Does not execute expressions or replace the full RegExp.escape specification.

Format references

Tool page updated: