There are 7 other file types using
the CLS file extension!

cls file icon.cls - ArcView geocoding classification file

cls file icon.cls - JavaScript class definition

cls file icon.cls - Microsoft Visual Basic 4 class module add-in

cls file icon.cls - Microsoft Visual C++ class definition

cls file icon.cls - AIM AOL Instant Messenger file

cls file icon.cls - LaTeX file

cls file icon.cls - Java class definition

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CLS file extension - SQLite 3 file

What is cls file? How to open cls files?

File type specification:

Database file type icon Database file type

The format used by SQLite database files has been completely revised. The old version 2.1 format and the new 3.0 format are incompatible with one another. Version 2.8 of SQLite will not read a version 3.0 database files and version 3.0 of SQLite will not read a version 2.8 database file.

The new database file format uses B+trees for tables. In a B+tree, all data is stored in the leaves of the tree instead of in both the leaves and the intermediate branch nodes. The use of B+trees for tables allows for better scalability and the storage of larger data fields without the use of overflow pages. Traditional B-trees are still used for indices.

The new file format also supports variable pages sizes between 512 and 32768 bytes. The size of a page is stored in the file header so the same library can read databases with different pages sizes, in theory, though this feature has not yet been implemented in practice.

The new file format omits unused fields from its disk images. For example, indices use only the key part of a B-tree record and not the data. So for indices, the field that records the length of the data is omitted. Integer values such as the length of key and data are stored using a variable-length encoding so that only one or two bytes are required to store the most common cases but up to 64-bits of information can be encoded if needed. Integer and floating point data is stored on the disk in binary rather than being converted into ASCII as in SQLite version 2.8. These changes taken together result in database files that are typically 25% to 35% smaller than the equivalent files in SQLite version 2.8.

The default software associated to cls file type:

SQLite icon

SQLite Development Team logo SQLite  Microsoft Windows software

Company or developer:
  SQLite Development Team

SQLite is embedded relational database management system used by many applications for storing databases.

It is a compact library and all database data are stored in single disk file.

SQLite databases uses for example Firefox, Thunderbird, Skype, Opera as well as is integrated in iOS, Symbian OS, Google Android, MeeGo and other Unix-based operating systems.

SQLite for Mac icon

SQLite Development Team logo SQLite for Mac  Apple macOS / Mac OS X software

Company or developer:
  SQLite Development Team

SQLite for Mac is a in-process library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. The code for SQLite is in the public domain and is thus free for use for any purpose, commercial or private.

SQLite for Linux icon

SQLite Development Team logo SQLite for Linux  Linux/Unix software

Company or developer:
  SQLite Development Team

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. The source code for SQLite is in the public domain.

Help how to open CLS files:

Currently there is no specific information available, about how to open this file extension.

For general information try to look at:
Basic info how to open databases

How to convert file with extension CLS:

Currently there is no specific information available, about how to convert this file extension.

For general information try to look at:
Basic info how to convert databases

List of recommended software applications associated to the .cls file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open cls file, edit cls file, convert cls file, view cls file, play cls file etc. (if exist software for corresponding action in File-Extensions.org's database).

  • Others cls file

Unspecified and all other actions for computer programs working with cls file - SQLite 3 file

Click on the software link(s) for more information. Suggested software applications use cls file type for internal purposes and/or also by different way than common edit or open cls file actions.

Microsoft Windows:

Apple macOS / Mac OS X:

Linux/Unix:

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