Portable grepWin searches and replaces text across files and folders using regular expressions, making it useful for code, documents and other text-based data. File filters such as size and date help focus results, and users can review matches before applying changes. The portable application supports Unicode, saved search configurations and command-line use.
| Author: | Stefan Küng |
| License: | Open Source |
| Price: | FREE |
| Released: | Jul 12, 2025 |
| File size: | 584 kB |
| Downloads: | 365 |
| Keywords: | Google, finder, portable grepwin, GitHub, x64 software, bulk text replacement, Windows 10, search file, regex search tool, Portable grepWin, regex replace files, Stefan Kueng, file search, find, replace file, regular expression search, search files by content, search |
| Author URL: | https://tools.stefankueng.com/ |
Portable grepWin is a Windows search-and-replace utility for developers, system administrators and other users who need to find or edit text across multiple files. It searches folders in bulk rather than requiring files to be opened one at a time, and regular expressions let users describe complex text patterns for targeted searches and replacements. Its portable format is suited to people who want to keep the tool on removable storage and run it on different computers without installing it.
Searches can be narrowed with file filters, including criteria such as file size and date, helping exclude unrelated files from large directories. Regular expressions support more than literal word or phrase matching: a pattern can identify text by its structure, which is useful when filenames, source code or data contain variable values. Matches can be reviewed before changes are made, so users can check which files and text segments a search would affect before carrying out a replacement.
The program handles operations across multiple files and directories and supports Unicode text. Search settings can be adjusted for the task, and saved configurations make recurring searches easier to run again. Command-line support provides another way to include searches in scripts or established workflows, while the graphical interface offers a direct way to set up and inspect an operation. Because the application is portable, it can also be carried on a USB drive for use in different work environments.
Typical uses include replacing repeated text in a codebase, locating a phrase across a collection of documents, and making consistent edits to batches of text files. Developers can use pattern-based searches to locate code structures or update source files; administrators and power users can apply the same approach to logs, configuration files and other text-based data. Filtering helps keep these operations focused, while reviewing matches before replacement reduces the risk of unintended edits.
Portable grepWin is open-source software by Stefan Küng and is available at no cost. It is intended for Windows computers and the portable package runs without a conventional installation. The software is suitable for Windows 10 and Windows 11 users who need a compact, reusable tool for searching and replacing text in folders, including when working away from their usual computer.