Extract Every URL from Any Text Extract all URLs (http/https) from text and list unique results.

The extractor relies on the React library, specifically the useCallback hook from react, to memoize the onProcess function and prevent unnecessary re-renders. This optimization ensures that the regular expression matching and URL cleaning logic is only executed when the input changes. Under the hood, the regex engine uses a deterministic finite automaton to match the pattern /https?:\/\/[^\s<>"{}|\\^`[\]]+/gi against the input string, allowing it to efficiently scan large texts for URLs. The use of the global and case-insensitive flags (gi) enables the regex to find matches regardless of the URL's position in the text or its case.

When a match is found, the extracted URL is passed through another regex replacement to remove trailing punctuation, which involves using JavaScript's String.prototype.replace method with a pattern that matches one or more occurrences of certain punctuation characters at the end of the string. The cleaned URLs are then added to an array and passed through a Set data structure to eliminate duplicates, taking advantage of the fact that Sets in JavaScript only store unique values. This deduplication step ensures that each URL is only listed once in the output, even if it appears multiple times in the original text. The TextToolLayout component from the @/components/shared directory handles rendering the input field, output label, and extracted URLs, providing a simple and intuitive user interface for the extractor.

The extractor's output is a plain text string containing the list of unique URLs, one per line, which can be easily copied or further processed using other tools or scripts. The use of React's client-side rendering capabilities allows the extractor to run entirely in the browser, without requiring any server-side infrastructure or network requests, making it a self-contained and lightweight solution for URL extraction tasks.