Advanced text search and replace with regex support, case sensitivity, and whole word matching.
The Find and Replace tool lets you search for text patterns within a block of text and replace them with new content. It supports plain text search, case-sensitive matching, whole word matching, and full regular expression (regex) support for advanced pattern matching — all running instantly in your browser with no data sent to any server.
The Find and Replace tool is a text processing utility that locates occurrences of a search term within your input text and replaces them with a specified replacement string. It mirrors the find-and-replace functionality found in code editors and word processors, but works directly in your browser for any text you paste in — no software installation required.
The tool offers four search modes that can be combined: plain text search, case-sensitive matching, whole word matching, and regular expression (regex) mode. These options give you precise control over what gets matched, from simple literal string replacement to complex pattern-based transformations using the full power of JavaScript's regex engine.
When you click Find, the tool highlights all matches in the output panel using a distinctive marker so you can see exactly what will be replaced before committing to the change. The match count is displayed prominently so you know how many occurrences were found. Replace All then performs all substitutions at once and shows the transformed text in the output panel, ready to copy.
The tool follows a simple workflow: paste your text, enter your search and replacement terms, configure your options, and run the operation.
Find and replace is one of the most frequently used text manipulation operations across many different workflows and professions.
Regular expressions are extremely powerful but can be tricky to get right. Always use the Find mode first to verify your regex matches exactly what you intend before running Replace All. A regex that's slightly too broad can match unintended text and produce incorrect results. The match count and highlighted output give you a clear preview of what will be affected.
When using regex with capture groups, you can reference the captured text in your replacement string using $1, $2, etc. for the first and second capture groups respectively. For example, to reformat a date from MM/DD/YYYY to YYYY-MM-DD, you would search for (\d{2})/(\d{2})/(\d{4}) and replace with $3-$1-$2. This kind of structural transformation would be tedious to do manually but takes seconds with regex.
The whole word matching option is particularly useful when you want to replace a short word that might appear as part of longer words. For example, replacing "cat" without whole word matching would also change "concatenate" and "category." Enabling whole word matching ensures only the standalone word "cat" is matched, leaving compound words intact.
Text processing runs locally. Your content never leaves your device.
Yes. Enable the regex mode to use pattern matching in the find field. For example, find \d+ to match any number, or [aeiou] to match any vowel. The replace field supports backreferences like $1 to insert captured groups.
By default, the search is case-sensitive. Toggle the case-insensitive option to match regardless of letter case. For example, case-insensitive search for 'hello' will also match 'Hello' and 'HELLO'.
Yes. Use the Replace All button to replace every occurrence in one click. The tool shows a count of how many replacements were made. Use Replace One to step through matches one at a time if you want to review each change.
This tool works entirely in your browser with no file size limits from a desktop app. It is useful for quick text transformations without opening a full editor. For large codebases or files, a desktop editor like VS Code with its multi-file find/replace is more powerful.
Yes. The tool treats the entire text as a single string, so patterns can match across line boundaries. In regex mode, use \n to match newlines, or enable the dotAll flag (s) to make . match newlines too.