Search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites have a search facility for online databases.

This article is about searching the World Wide Web. For other uses, see Search engine (disambiguation).

A search engine is a website that allows users to look up information on the World Wide Web (WWW), part of the Internet. The search engine will achieve this by looking at many web pages to find matches to the user's search inputs.

This page provides a full timeline of web search engines, starting from the WHOis in 1982, the Archie search engine in 1990, and subsequent developments in the field.

Search engines discover, crawl, transform, and store information for retrieval and presentation in response to user queries. The search results are usually presented in a list and are commonly called hits. The most widely used type of search engine is a web search engine, which searches for information on the World Wide Web.

General search engines that search for information on the Internet. This category has the following 23 subcategories, out of 23 total. The following 200 pages are in this category, out of approximately 241 total. This list may not reflect recent changes. Am I in Porn?

Tenor, a search engine for searching moving picture files in the Graphics Interchange Format GIPHY, another search engine for searching moving picture files in the Graphics Interchange Format TikTok, a search engine for short-form video content, owned by Chinese tech giant ByteDance Vine, another search engine for short-form video content YouTube Shorts, another …

Web search engines are listed in tables below for comparison purposes. The first table lists the company behind the engine, volume and ad support and identifies the nature of the software being used as free software or proprietary software.

Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

Recently, new internal search engines were created. These search engines can search Wikipedia articles, meanwhile they are user-friendly and are integrated into Wikipedia for a good …