Find and Replace Text
Find specific words or phrases in your text and replace them with something else all at once. Case-insensitive and regular-expression options are supported. All processing happens inside your browser, so your text is never sent externally.
Replacement rules
Rules are applied in order from top to bottom.
How to use
- Enter or paste the source text in the input box.
- Enter replacement rules, then add more rules or load a saved set if needed.
- Choose the entire text or a selection and the replacement extent, then select Preview.
- Check the count for each rule and the result, then apply it to the source or copy the result.
Frequently asked questions
Can I replace multiple places at once?
Yes. All parts matching the search text are replaced at once, and the number of replacements is shown too.
Can I use regular expressions?
Yes. Turn on "Use regex" to interpret the search text as a regular expression. For example, \d+ means consecutive digits.
Is the text I enter sent to a server?
No. All processing happens inside your browser, and your text is never sent to any external server.
Practical example and verification criteria
Find and Replace Text: First determine whether the conversion deletes or replaces source text, only changes order, or creates a new notation; check line endings, whitespace, case, Unicode, and language-specific rules. For hard-to-reverse operations such as replace or sort, preserve a separate source copy and test the option's scope on a small sample.
Find and Replace Text: For a quick check, start with A-B-A / A→C → C-B-C as a small input whose result relationship you can verify directly. Confirm that the input summary, units, and options match your intent before applying the tool to real values or a copy of the source; this reduces setup mistakes.
Find and Replace Text: Compare line and item counts, first and last values, duplicates, and blank lines before and after conversion; when possible, reverse the conversion to see whether the source is recovered. Initial consonants, Roman numerals, slugs, and hashtags can have different allowed characters or meanings by language and platform, so match the actual target system's rules.
Find and Replace Text · Work record: For real work, record the input conditions, selected options, and result together. Do not assume the same state will remain after a refresh or device change. Preserve important results separately using copy, download, a screenshot, or another method the page supports, then reopen them in the target environment.
Find and Replace Text · Error check: If an error or unexpected result appears, reduce the input, run again with default options, and then change one condition at a time. Recording error messages and boundary values helps distinguish format issues, unsupported cases, and browser resource limits, and prevents an empty result from being mistaken for success.
Find and Replace Text · Apply to: Check the page guidance for browser processing versus server lookup, storage location, and supported scope. Use sensitive source material or secrets only when strictly necessary. High-impact work such as legal, financial, or medical decisions or changes to an operational system requires current authoritative information and a separate verification process.