FileInfo
extension

QDL File - What is a .qdl file and how do I open it?

Learn about .QDL files and view a list of programs that open them.

Languages

EN

Overview

What is a QDL file? A QDL file contains source code written in the QDL programming language (pronounced “quiddle”), a general‑purpose scripting and functional language designed to work with aggregate data structures and program logic. QDL scripts use standard constructs such as loops, conditionals, and functions to define operations on data and automate tasks. QDL files are plain text and store code that a QDL interpreter can read and execute.

More Information The QDL language and QDL files are used with a QDL runtime or interpreter , typically installed on systems that support Java and scripting workflows. Developers use QDL for tasks such as scripting, rapid prototyping, data processing, or interactive exploration of algorithms. In some environments, like server‑side applications (for example, as part of the OA4MP authentication system), QDL scripts automate configuration and processing steps within a larger software system.

Popularity3.3/5

7 votes

Quick AppOpen with
VerifiedVerified by FileInfo.com The FileInfo.com team has independently researched the Quiddle Source Code file format and Mac and Windows apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified. If you would like to suggest any additions or updates to this page, please let us know .

Document Icon

Breadcrumbs

DeveloperNCSA
Popularity3.3 | 7 Votes

Previous / Next

‹ .QDFX.QDP ›

In-Depth

.QDL File Extension

Quiddle Source Code

DeveloperNCSA
Popularity
3.3  |  7 Votes
 

What is a QDL file?

A QDL file contains source code written in the QDL programming language (pronounced “quiddle”), a general‑purpose scripting and functional language designed to work with aggregate data structures and program logic. QDL scripts use standard constructs such as loops, conditionals, and functions to define operations on data and automate tasks. QDL files are plain text and store code that a QDL interpreter can read and execute.

More Information

The QDL language and QDL files are used with a QDL runtime or interpreter , typically installed on systems that support Java and scripting workflows. Developers use QDL for tasks such as scripting, rapid prototyping, data processing, or interactive exploration of algorithms. In some environments, like server‑side applications (for example, as part of the OA4MP authentication system), QDL scripts automate configuration and processing steps within a larger software system.

How to open a QDL file

You can open QDL files with any text editor, such as Microsoft Notepad , Apple TextEdit , or a code editor like Microsoft Visual Studio Code . To run or interpret a .qdl file, install the QDL distribution and use the provided command‑line tools (for example, qdl-run ) to execute the script in a workspace. Some setups also provide interactive workspaces where you can load and run QDL code directly.

Open over 400 file formats with File Viewer Plus . Free Download

Programs that open QDL files

Sort

Pricing

Program Name

Platform

Reset

X

All Platforms

NCSA QDL

Free

Microsoft Visual Studio Code

Free

Any text editor

Windows

Microsoft Notepad

Included with OS

Mac

Apple Textedit

Included with OS

Category: Developer Files

Updated: December 12, 2025

FAQ

What is a QDL file?↓
A QDL file contains source code written in the QDL programming language (pronounced “quiddle”), a general‑purpose scripting and functional language designed to work with aggregate data structures and program logic. QDL scripts use standard constructs such as loops, conditionals, and functions to define operations on data and automate tasks. QDL files are plain text and store code that a QDL interpreter can read and execute.
How do I open a .qdl file?↓
You can open QDL files with any text editor, such as Microsoft Notepad, Apple TextEdit, or a code editor like Microsoft Visual Studio Code. To run or interpret a .qdl file, install the QDL distribution and use the provided command‑line tools (for example, qdl-run) to execute the script in a workspace. Some setups also provide interactive workspaces where you can load and run QDL code directly.

Related