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IMDb

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IMDb is a massive online database containing information about entertainment. It tracks details for films, television series, podcasts, video games, and streaming content. This information includes cast lists, production crew members, and biographies. It also hosts plot summaries, trivia, user ratings, and reviews from both fans and critics. As of September 2025, the database held approximately 25.9 million titles. It also contained 14.8 million person records. This huge collection makes it a primary resource for the entertainment industry and fans alike.

Because it is so large, IMDb is a very popular destination on the internet. As of September 2025, it ranked as the 40th most visited website in the world. In the United States, it held the 35th most visited spot. The site offers various ways for users to interact with the data. Registered users have profile pages that show their registration date. They can also save their personal ratings for different titles. Since 2015, the site has used badges to recognize contributors. These badges show a count of how much a person has helped with categories like photos, trivia, or biographies.

One of the most famous parts of the site is the IMDb Top 250. This is a list of the 250 highest-rated films based on user ratings. The film *The Shawshank Redemption* (1994) has held the top spot since 2008. To keep the list accurate, IMDb uses a specific mathematical method. They use a weighted rating formula known in actuarial science as a credibility formula. In statistics, a result is considered more credible when there are more pieces of information. Therefore, the more eligible users who vote, the more reliable the rating becomes. IMDb does not disclose the exact criteria used to define a "regular voter."

The Top 250 list includes many different types of movies. It features major releases, independent films, and cult classics. It also includes silent films and non-English-language films. However, it currently does not include documentaries, short films, or TV episodes. There is a separate Top 250 list for television shows that began in 2015. There is also a Bottom 100 feature for films. To qualify for the Bottom 100 list, a film must receive at least 10,000 votes.

IMDb has a professional side called IMDbPro. This service is designed for people working in the entertainment industry. Actors, crew members, and executives can pay a yearly fee of US$149.99 for membership. This allows them to post resumes and upload professional headshots. It also lets them manage their own pages and upload hundreds of photos. Industry members can use IMDbPro to find agent contact information and see the rank order of industry personalities. This professional tool helps connect people within the business.

The history of IMDb began as a small hobby. Col Needham, an engineer at Hewlett-Packard, had kept a personal film database since 1987. In 1990, he shared these lists on a Usenet group called "rec.arts.movies." At that time, it was known as the "rec.arts.movies movie database." By 1993, the database moved to the World Wide Web. It was then called the Cardiff Internet Movie Database. It lived on the servers of the computer science department at Cardiff University in Wales. Rob Hartill was the author of the original web interface.

In 1996, IMDb was incorporated as a company in the United Kingdom. In April 1998, Jeff Bezos, the founder of Amazon.com, bought IMDb. Amazon paid $55 million for IMDb and two other companies. Since then, IMDb has functioned as an Amazon subsidiary. The company has also explored streaming services. They launched Freedive in 2019, which was later rebranded as IMDb TV. This service eventually became Amazon Freevee. On December 30, 2024, the service was closed as an independent site and merged into Amazon Prime Video. The site has also seen the removal of features, such as the message boards in February 2017. This decision was made because the boards did not provide a positive experience for the 250 million monthly users.

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