# WFindApps

> Free tools that find shared and repeated phrases in documents.

WFindApps is the home of two free, open-source Windows programs by Louis A. Bloomfield (University of Virginia) that find matching language in documents:

- **WCopyfind** (https://wcopyfind.wfindapps.org/) compares a collection of documents with each other and reports the phrases they share. It is widely used for plagiarism and collusion detection in schools and for research on text reuse. Current version 6.0.2.
- **WRepeatfind** (https://wrepeatfind.wfindapps.org/) looks within one document, or a book made of chapter files, for phrases it repeats, so writers and editors can catch accidental repetition. Current version 1.0.1.

Key facts:

- **Privacy: documents never leave the user's computer.** Both programs read and compare files entirely on the local PC. Nothing is uploaded, stored in the cloud, or analyzed remotely; no account is needed; they work offline. (WCopyfind downloads a web page only if the user explicitly adds an internet shortcut to one.)
- Free for any purpose; licensed under the GNU General Public License, version 3 or later; source code at https://github.com/lab3e/WFindApps.
- Run on 64-bit Windows 10 and 11 as single executables, with no installation. Mac and Linux users can use Wine or a Windows virtual machine.
- Read .docx, .doc, .txt, .htm/.html, and text-based .pdf files (PDF reading works best with the free pdftotext.exe from the Xpdf tools). Work with any language that separates words with spaces.
- Results are reports that open in a web browser, with matching passages highlighted.
- The programs do not search the internet; they compare the documents the user provides.
- Contact: the author, Louis A. Bloomfield (Professor Emeritus of Physics, University of Virginia), at lab3e@virginia.edu or Louis Bloomfield, Department of Physics, Box 400714, Charlottesville, VA 22904-4714. Bug reports and feature requests: https://github.com/lab3e/WFindApps/issues.

## Pages

- [About WFindApps and Lou Bloomfield](https://wfindapps.org/about.html): WFindApps is the home of WCopyfind and WRepeatfind, free text-matching programs created by Louis A. Bloomfield, Professor Emeritus of Physics at the University of Virginia, and shared freely since 2001.
- [Contact and Support](https://wfindapps.org/contact.html): How to get help with WCopyfind and WRepeatfind, report a bug, suggest a feature, propose a research collaboration, or write to the author, Lou Bloomfield.
- [Download WCopyfind and WRepeatfind](https://wfindapps.org/download.html): Download the latest versions of WCopyfind and WRepeatfind, free for Windows 10 and 11, plus sample documents to try them with, the source code, and older versions.
- [WFindApps: Free Tools That Find Shared and Repeated Phrases in Documents](https://wfindapps.org/): WCopyfind and WRepeatfind are free, open-source Windows programs that work entirely on your own computer, so your documents are never uploaded. WCopyfind finds the phrases documents share, for plagiarism detection; WRepeatfind finds the phrases a document repeats.
- [News and Releases](https://wfindapps.org/news.html): Release history for WCopyfind and WRepeatfind, from WCopyfind's first public versions to the 2026 releases of WCopyfind 6 and WRepeatfind 1.
- [Privacy: Your Documents Stay on Your Computer](https://wfindapps.org/privacy.html): WCopyfind and WRepeatfind read and compare documents entirely on your own computer. Nothing is uploaded, stored, or shared. This page explains exactly what the programs and these websites do and don't collect.

## Related

- [WFindApps](https://wfindapps.org/): home of both apps
- [WCopyfind](https://wcopyfind.wfindapps.org/): compares documents with each other to find shared phrases (plagiarism detection)
- [WRepeatfind](https://wrepeatfind.wfindapps.org/): finds phrases repeated within one document or book
- [Source code](https://github.com/lab3e/WFindApps) (GNU GPL v3 or later)