Online Delphi / Pascal Compiler: these are the best compilers

The best online Delphi / Pascal compilers

There are several online Delphi compilers. You can use compilers to compile and debug your Delphi code.

What is a Delphi compiler?

A Delphi compiler is a tool that translates a program written in a source language into a semantically equivalent program in a target language. Many free online compilers cannot translate, convert or ‘upgrade’ Delphi-code (for instance Delphi 4/5/6/7 to Delphi 10), but they can compile or debug code.

What are the best free Delphi compilers?

They all use the free Delphi compiler Free Pascal. Free Pascal is on GitLab, where you can find and download all files.

The best tool to upgrade Delphi: GDK Duster

Are you still using an old Delphi version and would you like to upgrade to a new version of Delphi? Then it is better to use the GDK Duster. The GDK Duster tools uses the Delphi compiler to automatically compile programs, find errors, and modify code to fix these errors. Since all changes are done through actions, you can just grab the latest codebase and start the conversion every time. When developing the GDK Duster tool, we always kept in mind to automate the conversion as much as possible.

GDK Duster Delphi upgrade tool

Are you interested in a personal demo of GDK Duster, or are you looking for help converting a Delphi project? Please contact us at


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