Regular expressions is a special language for searching text and manipulating substrings, based on the use of wildcard characters from which a search pattern is built.

This Regular expression search app only searches for single words in text using a given pattern. Phrase search and boolean search are not supported. However, the full-text search engine GroupDocs.Search, on which this application is based, also supports phrase search and boolean search when forming a query in object form. In this case, search patterns are specified separately for each word.

A regular expression example is the following string: "(.)\1{1,}". This query searches for a word that includes two consecutive identical characters. Note that the quotes around the expression are not part of the query. For this query, for example, the following words will be found:

This application is based on the .NET C# library, so use the regular expression language reference for the .NET C# language as needed.

How to search with regular expressions in document

  • Click inside the file drop area to upload a file or drag & drop a file.
  • Once upload completes, you will be able to perform search in your file.
  • Enter a regular expression in the search bar.
  • Get results by clicking the "Search" button.
  • Add more files with "Add files" button.
  • Select added files to include them into the index and perform searches.

Frequently asked questions

  • How does the online app Regex Search in Document work?

    The search is performed in two stages. First, documents are added to an index. And only then the search is performed in the index.
  • What about privacy, is it safe to use the online app Regex Search in Document?

    Access to your folder with uploaded and indexed files is only available to someone who has a link. All uploaded files are deleted from the servers after 24 hours.
  • Is an internet connection required to use the online app Regex Search in Document?

    This application is client-server. If you lose your internet connection while using the app, you won't be able to get search results.
  • Can I search on Linux, Mac OS, Android?

    You can search from any device, regardless of the operating system, that has a modern browser and an internet connection.

File formats supported by Regular Expressions search app

You can perform regular expressions search in many file formats. Please see the full list below.

Viewer Annotation Conversion Comparison Signature Assembly Metadata Search Parser Watermark Editor Merger Redaction Classification Splitter Translation Unlock Protect Scanner