Online Prolog Editor

A fully-featured online Prolog editor with syntax highlighting, code execution, and interactive query debugging.

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Total Calculations Run

< 15ms

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100%

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4.9 / 5.0

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About This Tool

The Online Prolog Editor is a powerful web-based tool that allows you to write, execute, and debug Prolog code directly in your browser. Featuring syntax highlighting, real-time code execution using the Tau Prolog library, and separate panels for code editing, query input, and result output, this tool provides a complete Prolog development environment without any installation. Perfect for students, educators, and developers learning or working with logic programming.

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How to Use

Write your Prolog program in the code editor area
Enter your query in the query input field
Click the 'Run Query' button to execute
View results in the output panel
Use 'Clear All' to reset the editor and outputs
Use 'Load Example' to see sample Prolog code

Frequently Asked Questions

Find Quick Answers

What Prolog implementation does this editor use?

This editor uses Tau Prolog, a full Prolog interpreter implemented in JavaScript that runs entirely in your browser.

Can I save my Prolog code?

The editor runs locally in your browser - you can copy your code manually or use your browser's save functionality. For persistent storage, consider using external code storage services.

What Prolog features are supported?

Tau Prolog supports ISO Prolog standards including lists, arithmetic, cut operator, dynamic predicates, and many built-in predicates. Check the Tau Prolog documentation for complete feature details.

Does this work on mobile devices?

Yes, the editor is fully responsive and works on tablets and smartphones, though the coding experience is best on larger screens.

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