Online Delphi / Pascal Compiler: these are the best compilers

The best online Delphi / Pascal compilers

There are various online Delphi compilers available. You can utilize compilers to compile and debug your Delphi code. Besides paid Delphi compilers, there are also several free compilers that utilize Free Pascal. Having trouble? We’ve got your back!

What is a Delphi compiler?

A Delphi compiler is a software tool used to translate programs written in the Delphi programming language into an executable format. It translates Delphi source code into machine code that can be executed on a computer. The primary objective of a Delphi compiler is to compile and optimize the source code for execution.

The compilation process involves translating readable Delphi source code into a format understandable by the computer processor. This includes identifying syntactical errors and optimizing instructions to ensure the program runs efficiently.

Although some free online compilers may not be able to convert older versions of Delphi code to newer ones – for example, Delphi 4/5/6/7 to Delphi 10 – they can still compile and debug the code. Compiling Delphi code using a Delphi compiler enables developers to build powerful and efficient applications for various platforms.

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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