Check your texts for plagiarism by comparing the original document with other text files stored locally or on the web or searching through an extensive online database. Use the fingerprinting technology to have a number of relevant chunks extracted from text and compared to the selected files.
The 1.4.3 version of CopySpider is provided as a free download on our website. You can install this free PC software on Windows XP/7/8/10 32-bit. The most popular versions among CopySpider users are 1.1 and 1.0. Our built-in antivirus scanned this download and rated it as virus free. The software lies within Education Tools, more precisely Teaching Tools. This free program was originally designed by CopySpider.
From the developer:
The CopySpider is a freeware tool to test documents under the existence criterion of undue copies of other documents available on the internet.
You may want to check out more software, such as CrypTool, VerseQ or GPSS World Student Version, which might be similar to CopySpider.