Find and replace text
Paste your text, type what to find and what to replace it with, and every match is swapped instantly. Turn on case-insensitive matching or full regular expressions, and see how many replacements were made — all without leaving your browser.
How to use Find and Replace
- 1
Paste your text
Drop in the text you want to edit.
- 2
Enter find and replace
Type the text to find and the text to replace it with.
- 3
Choose your options
Optionally ignore case, or turn on regular expressions for advanced patterns.
- 4
Copy the result
Every match is replaced instantly, with a count shown — copy the result with one click.
Replace every match in one pass
Editing the same word or phrase by hand throughout a long document is slow and easy to get wrong: miss one occurrence and the inconsistency slips through, or accidentally change the wrong thing and you have a new bug to chase. Find and Replace does the whole job in a single pass. You enter the text to find and the text to replace it with, and every match is swapped at once, with a count showing exactly how many replacements were made. That count is a quick confidence check — it confirms the tool found what you expected and tells you the scope of the change before you copy the result out. Whether you are renaming a term across an article, fixing a repeated typo, swapping a placeholder for a real value, or standardizing wording, doing it in one instant operation is far faster and more reliable than scrolling through and editing each instance yourself.
Case-insensitive matching when you need it
By default the search is case-sensitive, so 'Apple' and 'apple' are treated as different words — exactly what you want when capitalization matters, such as replacing a proper noun without touching the same letters elsewhere. But often you need the opposite: catching a word no matter how it was capitalized. Turn on the 'Ignore case' option and the tool matches every variation at once, so 'Color', 'color' and 'COLOR' are all found and replaced in a single step. This is invaluable when text has been written by several people, pasted from different sources, or simply typed inconsistently. You can toggle the option and watch the replacement count change immediately, which makes it easy to see how many extra matches case-insensitive mode catches and decide whether that is the behavior you actually want for this particular edit.
Full regular expressions for power users
When a plain word search is not enough, switch on regular expression mode and the 'find' field becomes a full regex pattern. That unlocks edits that would be impossible or painfully tedious by hand: collapse runs of multiple spaces into one, strip trailing whitespace from every line, reformat dates or phone numbers, wrap or unwrap text, or match a family of words with a single pattern. The replacement field supports capture group references too, so you can rearrange the pieces a pattern matched rather than just deleting them. If a pattern is invalid, the tool tells you instead of failing silently or mangling your text, so you can fix it and try again. Regex mode turns Find and Replace from a simple word swapper into a genuinely powerful text-transformation tool, while staying out of the way when you only need a basic replacement. Because the same panel handles both, you can start with a plain swap and reach for a pattern only when the job actually calls for one, without switching tools or learning a new interface.
Private by design — nothing is uploaded
The text you are editing might be a confidential draft, client work, source code or personal notes, so it should not be sent to a stranger's server just to change a word. In1 runs the entire find-and-replace operation locally in your browser using plain JavaScript. Nothing is uploaded, nothing is stored and there is no account to create. The replacement happens the instant you type, with no request travelling to a server and back, which also means it works the same offline as online and never fails because of a slow connection. You can paste an entire document and the swap is still immediate. When you are done, one click copies the result so you can paste it straight back into your editor. It is the convenience of an online tool with the privacy of doing the edit on your own machine, which is exactly what sensitive text deserves.
Who uses find and replace?
Almost everyone who works with text has a use for it. Writers and editors standardize terminology, fix a repeated misspelling, or change a character's name throughout a draft. Developers and data analysts reformat values, clean up exported data, and transform strings with regex patterns that would take ages to apply by hand. Translators and localizers swap placeholders and adjust wording consistently across a file. Office workers update names, dates and figures that appear many times in a document before sharing it. Marketers tweak a campaign phrase everywhere it appears. Students reformat references and citations. Because the tool covers everything from a one-word swap to a sophisticated pattern-based transformation, and does it instantly and privately in the browser, it serves quick everyday edits and serious bulk cleanups equally well, without anyone needing to open a heavyweight editor or trust their text to an online service. Customer support teams normalize canned responses, researchers clean transcripts before analysis, and bloggers update an outdated link or brand name across an entire post in one move. The replacement count is reassuring on every one of these jobs, because it confirms the change reached exactly as many places as you expected and no more, turning a nervous bulk edit into one you can verify at a glance.
Higher limits, batch processing and an API are on the way. Want early access?