Find and Replace a String
Replace every match of a word or regular expression. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Find and Replace a String
- 1. Paste the text to edit. Enter the string or document you want to make replacements in into the input pane, from a single line to a full body of text.
- 2. Enter Find and Replace with. Type the text or pattern to search for under Find and what should replace it under Replace with. Turn on Use a regular expression for pattern matching and Case sensitive to control letter-case matching.
- 3. Copy the updated text. Copy the result with every match replaced, and paste it wherever the corrected or updated text belongs.
When to use Find and Replace a String
Find and Replace a String replaces every match of a word or regular expression with text you specify. It is the general text-editing workhorse for anywhere a word, phrase, or pattern needs to be swapped consistently throughout a passage.
- Renaming a variable across pasted code. You copied a code snippet from documentation and want to rename a placeholder variable to match your own naming convention throughout the whole snippet at once.
- Fixing a repeated misspelling in a document. A draft consistently misspells a company or product name, and replacing every occurrence in one pass corrects it without hunting through the text manually.
- Standardizing terminology in a style pass. A document mixes 'e-mail' and 'email' inconsistently, and running a case-sensitive replace normalizes every instance to the preferred spelling before publishing.
- Using a regex to reformat repeated patterns. You want to reformat every date in a document from one format to another using a regular expression, applying the transformation consistently across the whole text.
Examples
Swap a word
Input
the cat sat on the cat
Output
the dog sat on the dog
About the Find and Replace a String tool
Find and Replace a String runs as plain JavaScript in your browser tab, with no server behind it. Replace every match of a word or regular expression. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's String Tools section, 159 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 4 settings, including Find, Replace with, Use a regular expression and Case sensitive, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Find and Replace a String free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.