Regex String Escape Tool
Escape special regular expression characters online (. * + ? ^ $ { } [ ] ( ) | \). Safely escape raw strings for RegExp constructors in your browser.
How to Use Regex String Escaper Online
Follow these quick steps to process your data online directly in your browser with zero latency and 100% privacy.
Example Input & Output
Prepends backslashes before special regex meta-characters so they can be matched literally.
https://example.com/api?v=1.0&id=[100]
https:\/\/example\.com\/api\?v=1\.0&id=\[100\]
Common Use Cases
Dynamic RegExp Construction
Safely pass user search strings into new RegExp() constructors without syntax crashes or regex injection vulnerabilities.
Literal Substring Matching
Match URLs, file paths, brackets, and math formulas containing asterisks, question marks, and dots as exact literal characters.
Frequently Asked Questions
How do I escape regex special characters online?
Paste your text into the Source Text editor above. The tool automatically identifies all 14 reserved regex characters and prepends escape backslashes in real time.
Why do regular expressions require character escaping?
Special characters like dots (.), asterisks (*), and brackets ([]) serve as wildcards and quantifiers in regex syntax. Escaping them tells the regex engine to match their literal character glyphs.
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