Find & Replace

What Is Find and Replace?

Find and replace is one of the most fundamental text-editing operations: you locate every occurrence of a search term and substitute it with new text. It is the workhorse behind tasks ranging from fixing a misspelled name throughout a document to reformatting structured data. A good find-and-replace tool does more than match literal strings — it can respect or ignore letter case, restrict matches to complete words so it does not break apart longer terms, and use pattern matching to handle variable text.

This tool brings those capabilities to the browser without any installation. You paste text into the input pane, type what you are looking for, and see every match highlighted live in the result pane on the right. Because all matching is performed by JavaScript's built-in regular-expression engine running on your own machine, even sensitive content such as code, logs, or personal notes can be processed safely. The matched text is highlighted in real time, and the live match counter tells you exactly how many occurrences were found before you commit to any change.

How to Use This Find & Replace Tool

Paste or type your text into the Input Text pane. Enter the term you want to locate in the Find box; matches are highlighted instantly in the Result pane and counted in the stats line below. Type the substitution text in the Replace with box. Use the three checkboxes to refine matching: Case sensitive requires the exact letter casing, Whole word matches only complete words rather than fragments inside larger words, and Regular expression treats your search as a regex pattern.

When you are ready, click Replace All to substitute every match at once, or Replace Next to step through and replace matches one at a time. Replacements are written back into the input pane and the count of changed occurrences is shown. Use the Copy button above the result to copy the current text to your clipboard.

Real-World Use Cases

• Renaming a variable or function — turn on Whole word and Case sensitive to rename userId across a code snippet without touching userIdList.
• Cleaning up pasted data — strip out repeated separators, fix inconsistent spacing, or normalize line formatting in copied text.
• Reformatting with regex — use a capture-group pattern to reorder fields, such as swapping First Last into Last, First.
• Updating boilerplate — replace a placeholder like {{name}} with a real value throughout a template.
• Redacting sensitive terms — locate and replace names, IDs, or tokens with a masked value entirely offline.

Tips for Effective Find and Replace

• Watch the live highlighting and match count before clicking Replace All so you can confirm the pattern hits exactly what you intend.
• Enable Whole word when replacing short terms to avoid accidentally matching them inside longer words.
• In regex mode, use capture groups in the Find box and reference them with $1, $2 in the Replace box to rearrange matched text.
• If your search uses characters like ., *, or ( as literal text, leave regex mode off so they are matched exactly rather than as special symbols.
• Use Replace Next to review and apply changes individually when you only want to fix some occurrences, not all of them.

Features

• Live match highlighting — every match is highlighted in the result pane as you type.
• Match counter — see the exact number of matches before replacing anything.
• Case-sensitive matching — toggle exact letter-case matching on or off.
• Whole-word matching — match complete words only, not substrings.
• Regular expressions — use full regex patterns, including capture groups referenced as $1 in the replacement.
• Replace Next or Replace All — substitute one occurrence at a time or every match at once.
• One-click copy — copy the result text to your clipboard instantly.
• 100% client-side — your data never leaves your browser.

Frequently Asked Questions

Is my text stored anywhere?

No. All find and replace operations happen entirely in your browser using JavaScript. Your text is never uploaded, sent to a server, or stored anywhere outside your own device.

Can I use regex capture groups in the replacement?

Yes. When the Regular expression option is enabled, wrap parts of your pattern in parentheses to create capture groups, then reference them with $1, $2, and so on in the Replace with field to reuse the matched text.

What is the difference between Replace Next and Replace All?

Replace All substitutes every match in the input at once and reports the total number changed. Replace Next replaces a single match at a time, letting you step through occurrences and apply changes selectively.

What does the Whole word option do?

Whole word wraps your search in word boundaries so it only matches complete words. For example, searching cat with this option on will match cat but not the cat inside category or scatter.

What happens if my regular expression is invalid?

If the pattern cannot be compiled, the tool simply shows "Invalid pattern" in the stats line and leaves your text unchanged, so a typo in a regex will never corrupt your input.

Is matching case sensitive by default?

No. By default the search ignores letter case, so Apple matches apple and APPLE. Enable the Case sensitive checkbox to require an exact case match.