Search and substitute text with regex, case and whole-word options.
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Search-and-replace, but on the web, with regex. Paste any text and substitute matches with options for case sensitivity, whole-word matching and full regular expressions. The match counter updates as you type so you can verify your pattern before copying the result. Useful for renaming variables in a code snippet, fixing typos across a long document, or normalising data before pasting it into a spreadsheet.
Type or paste the target you want to inspect into the input field at the top of the page.
Click the check button — the tool queries live data sources and returns results in seconds.
Review each finding: status, score, and the reason behind every warning are listed line by line.
Follow the linked remediation guides to fix issues, or copy the report to share with your team.
When something in your stack misbehaves, half the battle is figuring out whether the problem is you, the network, or the other side. Find and Replace Text gives you a fast, opinionated readout so you can rule things in and out in seconds. Because the check runs on live infrastructure and reports raw results — not marketing-safe summaries — you can trust what you see and act on it. Toolzer's design philosophy is simple: privacy-first (no tracking, no accounts), performance-first (the page is interactive in under a second on a 3G connection), and honesty-first (no fake ratings, no dark patterns, no upsells). Find and Replace Text follows the same rules as every other utility on the site. You can bookmark this page, share the URL with a colleague, or pin it to your browser's toolbar — the experience will be identical every visit, and it will keep working even if you're on airplane Wi-Fi. Real people use this tool for real work — freelancers cleaning up client deliverables, sysadmins triaging tickets, students finishing assignments — and it is tuned for those workflows, not for demo videos.
JavaScript regex (ECMAScript). Lookbehind, named groups, Unicode property escapes — anything modern V8/SpiderMonkey support.
Yes. Use $1, $2, etc., the same as JavaScript's String.prototype.replace.
When regex is on, you control word boundaries with \b yourself, which is more flexible than the checkbox.
No. Everything runs in your browser.
No. Every utility on Toolzer is free, anonymous, and works in any modern browser without registration.
Yes. Whenever the tool can produce an answer entirely in the browser, the data never leaves your device.
Yes. The interface is fully responsive and works on iOS Safari, Android Chrome, and every modern mobile browser.
Yes. Every Toolzer page has a clean permanent URL you can bookmark or share.
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