Test regular expressions with real-time match highlighting, flags, and capture groups.
Compare two blocks of text and display additions, deletions, and differences.
Find and replace text using regular expressions and capture groups.
Analyze word frequencies and rank top recurring terms (with stopword filtering).
Deconstruct and explain regular expression tokens, quantifiers, and groups in plain English.
Scanning a long document for every mention of a specific word or pattern is tedious using Ctrl+F alone, especially when you want to see all matches at once rather than clicking through one at a time, and this highlight text tool solves that by visually marking every occurrence instantly. It supports both plain substring search and full regular expression matching, making it useful for editors checking word usage across a manuscript, developers searching logs for a pattern, and researchers scanning documents for keyword mentions. Paste your text, enter a search term or regex pattern, and every match gets highlighted in place along with a total occurrence count. Since the search runs entirely in your browser, your document is never uploaded. Paste your text below and start searching instantly.
This tool highlights every match simultaneously and shows a total count, while Ctrl+F typically cycles through matches one at a time without a persistent highlighted view.
Yes, the tool supports full regex pattern matching, so you can search for patterns like email addresses, phone numbers, or custom formats, not just literal text.
Yes, you can toggle between case-sensitive and case-insensitive search depending on whether case matters for your search.
No practical limit, since searching and highlighting run locally in your browser rather than through a server request.
Yes, it displays the total number of matches found alongside the highlighted occurrences in the text.
No, all searching and highlighting happens client-side in JavaScript, and your text is never sent to a server.