
Which is more popular?
Based on our record, FILExt seems to be more popular. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | filext.com | opalstack.com |
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| Company | 2000 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


FILExt is one of the oldest and most respected collections of file formats and file extensions. Over the past 20 years, more than 50 million users have found the right information and tools to open any file on their computer or smartphone. Our knowledge gathered during this period is regularly...
No description of Opalstack yet.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of FILExt yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing FILExt and Opalstack.
FILExt's answer
FILExt.com is a specialized online resource that provides comprehensive information about file extensions and the software applications associated with them. What makes FILExt.com unique is its extensive and meticulously curated database of file extension information, which serves as a valuable tool for users trying to identify unknown file types or seeking compatible software to open specific files.
Key Features That Make FILExt.com Unique:
Extensive Database: FILExt.com boasts one of the largest collections of file extension information available online, covering a wide range of file types across various platforms and industries.
Detailed Information: Each entry includes detailed descriptions of the file type, its purpose, and the software programs that can open, edit, or convert the file, providing users with actionable information.
User-Friendly Interface: The website is designed for easy navigation, allowing users to search for file extensions alphabetically or use a search function to find specific file types quickly.
Regular Updates: The database is continually updated to include new file extensions and software applications, ensuring that the information remains current and relevant.
Community Engagement: FILExt.com often incorporates user contributions, allowing individuals to submit new information or corrections, which helps maintain the accuracy and breadth of the database.
Educational Resources: Beyond just listing file extensions, FILExt.com may offer articles and guides that educate users on how to handle different file types, troubleshoot issues, and understand the nuances of file compatibility.
By focusing exclusively on file extensions and their associated applications, FILExt.com provides a niche but essential service that assists users in navigating the complexities of various file formats, making it a unique and valuable resource on the internet.
FILExt's answer
FILExt.com provides a comprehensive and up-to-date database of file extensions with reliable information on how to open them, making it a user-friendly choice over its competitors.
FILExt's answer
The primary audience of FILExt.com is users seeking information about unknown or unfamiliar file extensions, including how to open, use, or convert files with those extensions.
FILExt's answer
FILExt was established in 2000 by Tom Simondi in California and is now based in the heart of Europe. In the 1990s, Tom Simondi worked mainly in computer support, sharing his knowledge with the Internet community. A single file extension page on 'Computer Knowledge' became particularly popular, because this website contained not only the appropriate description but also links to the software manufacturers. PC Magazine has selected Tom's file extension site as one of their Best 100 Undiscovered Sites. Microsoft became aware of this website and integrated it into Windows XP. When XP tried to open a file it did not know how to open it gave the user the option of choosing a local program or go to the Internet to find the answer. The second option resulted in Tom's file extension research page. Due to the great response to this single web page, FILExt.com was launched in 2001.
FILExt's answer
FILExt.com primarily uses Microsoft technologies like ASP.NET for its server-side scripting.
FILExt's answer
Some of FILExt's biggest customers are Fortune Global 500 companies.
Share your experience with using FILExt and Opalstack. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Better than Apache Tika's File Analyzer. The Filext online viewer shows any text found in a uploaded files. thousands of file types are previewed.
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Recommendations tracked on public social media and blogs since March 2021.


Use https://filext.com to determine what kind of file it is, because some extensions are used for multiple file types. For example it can be used on DVDs as part of an automatic launching, as a form of executable file refered to as... Source: about 4 years ago
I can't figure out the ones without the filetype The VRM files are probably VR Model files, which you can learn more about here: https://vrm.dev/en/ Howeveer, the VRM files also say that they are gzip compressed, and I can't figure out... Source: over 4 years ago
Tracking Opalstack since Sep 2023.
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