OPT file icon

OPT File Extension

MySQL Database Data Format

What is OPT file?

Files with OPT extension are used for storing database properties. OPT files store such information as date of creation or history of changes made to given database settings. MySQL database management software typically saves such information in db.OPT files, which are saved in the Data folder. Each database has an OPT file assigned to it.

Other MySQL database configuration files

MySQL Data folder can also store other database configuration files, including:

  • FRM – a file containing database schema;
  • MYD – a file that stores MyISAM settings;
  • MYI – a file that contains information related to MyISAM table indices;
  • IBD – a file that stores data and indices of InnoDB tables.

The presence to db.OPT is mandatory, while other files are required depending on the database storage engine used.

Programs which support OPT file extension

The following list contains programs grouped by 3 operating systems that support OPT files. OPT files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Programs that support OPT file

Updated: 10/25/2022

How to open file with OPT extension?

Problems with accessing OPT may be due to various reasons. What is important, all common issues related to files with OPT extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. We have prepared a listing of which will help you resolve your problems with OPT files.

Step 1. Install MySQL software

Install software to open OPT file Problems with opening and working with OPT files are most probably having to do with no proper software compatible with OPT files being present on your machine. This one is an easy one. Select MySQL or one of the recommended programs (for example, Navicat for MySQL, Navicat for MySQL (Mac OS X), Navicat for MySQL (Linux)) and download it from appropriate source and install on your system. Above you will find a complete listing of programs that support OPT files, classified according to system platforms for which they are available. One of the most risk-free method of downloading software is using links provided by official distributors. Visit MySQL website and download the installer.

Step 2. Verify the you have the latest version of MySQL

Update software that support file extension OPTIf you already have MySQL installed on your systems and OPT files are still not opened properly, check if you have the latest version of the software. It may also happen that software creators by updating their applications add compatibility with other, newer file formats. The reason that MySQL cannot handle files with OPT may be that the software is outdated. The most recent version of MySQL is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Associate MySQL Database Data Format files with MySQL

If you have the latest version of MySQL installed and the problem persists, select it as the default program to be used to manage OPT on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Associate software with OPT file on Windows

Selecting the first-choice application in Windows

  • Clicking the OPT with right mouse button will bring a menu from which you should select the Open with option
  • Select Choose another app → More apps
  • To finalize the process, select Look for another app on this PC entry and using the file explorer select the MySQL installation folder. Confirm by checking Always use this app to open OPT files box and clicking OK button.
Associate software with OPT file on Mac

Selecting the first-choice application in Mac OS

  • Right-click the OPT file and select Information
  • Proceed to the Open with section. If its closed, click the title to access available options
  • From the list choose the appropriate program and confirm by clicking Change for all....
  • If you followed the previous steps a message should appear: This change will be applied to all files with OPT extension. Next, click the Continue button to finalize the process.

Step 4. Verify that the OPT is not faulty

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the OPT file in question. Being unable to access the file can be related to various issues.

Check OPT file for viruses
1. Check the OPT file for viruses or malware

Should it happed that the OPT is infected with a virus, this may be that cause that prevents you from accessing it. Scan the OPT file as well as your computer for malware or viruses. If the OPT file is indeed infected follow the instructions below.

2. Ensure the file with OPT extension is complete and error-free

If the OPT file was sent to you by someone else, ask this person to resend the file to you. During the copy process of the file errors may occurred rendering the file incomplete or corrupted. This could be the source of encountered problems with the file. It could happen the the download process of file with OPT extension was interrupted and the file data is defective. Download the file again from the same source.

3. Check if the user that you are logged as has administrative privileges.

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Verify that your device fulfills the requirements to be able to open MySQL

If the system is under havy load, it may not be able to handle the program that you use to open files with OPT extension. In this case close the other applications.

5. Verify that your operating system and drivers are up to date

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with MySQL Database Data Format files. It is possible that one of the available system or driver updates may solve the problems with OPT files affecting older versions of given software.

Do you want to help?

If you have additional information about the OPT file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on OPT file.

Top File Extensions
Show more
File Extension of the day
pbix icon


Microsoft Power BI Report Format

.PBIX files can be found within the business software application Power BI Desktop. They encompass a range of business data presented in an accessi...