Find & Replace Tool
Find and replace text across a large document with regex support and case sensitivity options.
Preview
Result Text
What Is the Find & Replace Tool?
The Find & Replace Tool is a powerful browser-based text editor utility that lets you search for any string—or pattern—inside a large block of text and replace it with something else. Whether you need to fix a typo repeated hundreds of times, rename a variable across a code snippet, or clean up formatted data, this tool handles it instantly without requiring any software installation.
It supports regular expressions (regex) for advanced pattern matching, case-sensitive matching for precise control, and whole-word matching to avoid unintended partial replacements. You can preview highlighted matches before committing, step through them one by one, or replace everything in a single click.
How to Use This Tool
- Paste or type your document into the Input Text area.
- Enter the text you want to find in the Find field.
- Enter the replacement text in the Replace With field (leave blank to delete matches).
- Toggle options: Case Sensitive, Whole Word, or Regex Mode as needed.
- Click Find All to highlight all matches in the preview panel and see the match count.
- Click Replace All to replace every match at once, or use Prev / Next and Replace This to step through matches individually.
- Copy the final result using the Copy Result button.
Common Use Cases
- Fixing repeated typos or misspellings in essays, blog posts, or reports.
- Renaming variables, functions, or class names in code snippets.
- Replacing placeholder text (e.g.,
[NAME]) with real values in templates. - Cleaning up CSV or log files by removing unwanted characters or patterns.
- Converting date or number formats using regex capture groups.
- Stripping HTML tags or markdown syntax from raw content.
- Normalising whitespace, line endings, or punctuation across a document.
Frequently Asked Questions
Does this tool support regular expressions?
Yes. Toggle the Regex Mode checkbox and enter any valid JavaScript regular expression in the Find field. For example, use \d+ to match sequences of digits, or https?://\S+ to match URLs. If the regex is invalid, an error message will be shown.
Can I use capture groups in replacements?
Yes, when Regex Mode is enabled you can reference capture groups in the Replace With field using $1, $2, etc. For example, finding (\w+)\s(\w+) and replacing with $2 $1 swaps the order of two words.
What does "Whole Word" matching do?
When enabled, the search only matches the exact word and not when it appears as part of a longer word. For example, searching for cat with Whole Word on will match "cat" but not "concatenate" or "scatter".
Is my text sent to any server?
No. Everything runs entirely in your browser using JavaScript. Your text never leaves your device, making this tool safe to use with sensitive or private documents.
How large a document can I use?
The tool handles documents of several hundred thousand characters comfortably in most modern browsers. For extremely large files (several MB of text), performance depends on your browser and device. There is no hard limit imposed by the tool itself.
What happens if I leave the Replace field empty?
Leaving the Replace With field blank effectively deletes every matched string. This is useful for removing unwanted characters, whitespace, or patterns from your document.