Replace Multiple Strings
Apply a whole set of find/replace rules in one pass. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Replace Multiple Strings
- 1. Paste your text. Enter the text you want to transform into the input pane, such as a paragraph, a template, or a batch of lines needing several substitutions.
- 2. List your find and replace rules. Enter one rule per line in Rules using the format find=replace, so the cat sat becomes the dog lay by pairing cat=dog and sat=lay on separate lines.
- 3. Decide on case sensitivity. Turn on Case sensitive if Cat and cat should be treated as different matches, or leave it off to match regardless of letter case.
- 4. Copy the transformed text. Copy the fully substituted text from the output pane once every rule has been applied in one pass.
When to use Replace Multiple Strings
Replace Multiple Strings applies a whole set of find and replace rules to text in a single pass, rather than running one substitution at a time. It's for template filling, bulk text cleanup and any job with more than one thing that needs swapping at once.
- Filling in a document template. A contract template uses placeholder names and dates that need swapping for real values. Listing each placeholder and its replacement as a rule fills in the whole document in one step.
- Renaming several terms across a document. A style guide update means multiple product names or terms need renaming consistently across a document. Defining all the rename rules up front applies them together correctly.
- Cleaning up several inconsistent spellings at once. A dataset has multiple variant spellings of the same term, like grey and gray, that should all become one standard form. Listing each variant as its own rule normalizes them together.
- Anonymizing a batch of names in sample data. A support ticket transcript needs several real names replaced with placeholders before sharing it externally. Multiple find and replace rules applied together handle every name in one pass.
Examples
Swap two words
Input
the cat sat
Output
the dog lay
About the Replace Multiple Strings tool
Replace Multiple Strings is a free online tool that works entirely inside your web browser. Apply a whole set of find/replace rules in one pass. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 159 String utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with 2 settings, including Rules (one find=replace per line) 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.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Is Replace Multiple Strings 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.