Free Pascal (full name Free Pascal Compiler, often abbreviated to FPC) is a freely distributed compiler of the Object Pascal programming language. The compiler exists for various hardware and software platforms. Free Pascal is a mature, universal, open-source Pascal compiler.

It can run on many processor architectures: Intel x86 (16 and 32-bit), AMD64/x86-64, PowerPC, PowerPC64, SPARC, SPARC64, ARM, AArch64, MIPS, Motorola 68k, AVR, and JVM. Supported operating systems include Windows (16/32/64 bit, CE, and native NT), Linux, Mac OS X/iOS/iPhone simulator/Darwin, FreeBSD, and other BSD, DOS, OS/2, AIX, Android, Haiku, Nintendo GBA/DS/Wii, AmigaOS, MorphOS, AROS, Atari TOS and various embedded platforms. In addition, support for RISC-V (32/64), Xtensa, and Z80 architectures, as well as the LLVM compiler infrastructure, is available in the developer version.

More information and alternatives

Main features: writing, compiling, and debugging programs written in Pascal, comes with a runtime library and a Freepascal component library, provide global properties, function overloading, and operator overloading, and offers an active user community. The language syntax is perfectly compatible with TP 7.0 and most Delphi versions (classes, RTTI, exceptions, ANSI strings, sweeping strings, interfaces). A Mac Pascal mode is also available, largely compatible with Think Pascal and Metrowerks Pascal. In addition, Free Pascal supports function overloading, operator overloading, global properties, and some other advanced features. The project is also developing Lazarus, a free development environment analog of Delphi, and Lazarus Components Library (LCL), a free widget library similar to Delphi's VCL.

Why download Free Pascal to Windows?

Links to some older versions (no longer supported) of FPC for platforms for which no better alternative currently exists can be found here. Do not try to report any bugs in these older releases - we will not fix them. The main reason these platforms are no longer supported is the lack of maintainers. If you are interested in upgrading these platforms, contact us (using the FPC-devel mailing list, for example).

It is compatible with the Borland Turbo Pascal 7.0 and Delphi 7 language supports, although it has better improvements for them, such as the over boarding operator. The Free Pascal environment's interface is in text mode, as before, and is similar to that of Turbo Pascal and Borland. Other features of Free Pascal are processing overhead, register loading variables, code optimizer, flow level analysis data assembler, global properties, and so on.