Regex From Text
AI-generated regular expressions for descriptions the free heuristic engine cannot match. A hosted LLM handles arbitrary, open-ended phrasings. Uses 1 credit per run.
About Regex From Text
Regex From Text turns a plain-English description into a working regular expression using a hosted LLM. Reach for it when the free heuristic builder can't handle your phrasing, or when the pattern is too open-ended to express by hand. You describe what to match and it returns the regex as JSON; each run costs 1 credit.
- Category
- inspect
- Input
- Accepts: text/plain.
- Output
- Outputs: application/json.
- Cost
- Credit-metered
- Memory
- low
Common uses
- Generate a pattern to match invoice numbers like 'INV-2024-0001' described in words
- Build a regex for an oddly formatted internal ID you can only describe loosely
- Match dates written several different ways without hand-crafting alternations
- Get a starting pattern for log lines you want to filter but can't express yet
- Translate a teammate's plain-English 'match everything that looks like X' request into a real expression
- Draft a validation pattern for a custom code format for a form field
Frequently asked questions
How do I use it?
Type a description of what you want to match as plain text. It returns the generated regular expression as JSON that you can copy into your code.
How is this different from the free Regex Tester?
The free Regex Tester runs a regex you already have against sample text. This tool writes the regex for you from a description, using an LLM that handles arbitrary phrasing the heuristic engine can't.
Does my text get uploaded?
Yes. As a Pro tool it sends your description to a hosted LLM. The free heuristic and the Regex Tester run in your browser if you prefer not to upload.
Should I test the generated regex?
Yes. LLM-generated patterns are usually close but not guaranteed correct, so run the result against real samples in the free Regex Tester before relying on it.
What does it cost?
1 credit per generated expression.
Keywords
- regex
- regexp
- natural language
- pattern
- generate
- pro
- ai
- llm