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All apps/grex

grex

Generates regular expressions from user-provided test cases.

Runs as grex|macOS, Linux, Windows|github.com

Open form in Otty otty.toml

Command form

ai-draft · 2 tasks · 15 fields

Build a regular expression from example strings or a file of test cases.

Opens the form; the finished command lands at your prompt, unrun

Run in Otty

otty gui grex

Generate regexExample values, fixed in this page — nothing here reaches a terminal

Basic

Test cases*

string

Digits to \d

--digits

Detect repetitions

--repetitions

TasksEach one presets the form for one job

From examples

inputsdigitsrepetitions

From a file

filedigitswordsrepetitions

ParametersOnly these flags are editable in the form

Test cases

Example strings the regex must match.
string · positional 0 · repeatable

Read test cases from file

One test case per line.
path

--file-f

Digits to \d

boolean

--digits-d

Whitespace to \s

boolean

--spaces-s

Word characters to \w

boolean

--words-w

Detect repetitions

Convert repeated substrings to {min,max} notation.
boolean

--repetitions-r

Ignore case

boolean

--ignore-case-i

Capturing groups

boolean

--capture-groups-g

Escape non-ASCII

boolean

--escape-e

Non-digits to \D

boolean

--non-digits-D

Non-whitespace to \S

boolean

--non-spaces-S

Non-word to \W

boolean

--non-words-W

Syntax highlighting

boolean

--colorize-c

Minimum repetitions

Needs --repetitions.
string

--min-repetitions

Minimum substring length

Needs --repetitions.
string

--min-substring-length

SourcesEvery flag above is checked against these

fig

completion

github.com

Before it fills your prompt, Otty checks the installed grex against its version. A form that does not match your version is not offered.