For FL Studio 12.5 - 32bit / 64bit

Download the FL Studio installer from Image-Line

Download 12.5 from Image-Line
Download the FL Studio installer

Download 12.5 from Google mirror

FL Studio Size: 670 MB (702 885 584 bytes) | SHA-256 checksum: 9AF49763AE3D70211377FC59694D731C94EF928DD308CC5405C0FEA39FE60FDA

Lifetime free updates:

Buying FL Studio not only gets you the latest version but all future FL Studio updates free. We believe you should have the functionality you paid for, bug-fixed, developed and updated for as long as we develop FL Studio. This has been our promise for 19 years and counting.

Already own FL Studio? - How to use Lifetime Free Updates

FL Studio trial / demo limitations:

You CAN export projects to all supported audio formats. Projects CAN BE SAVED but won’t open, as saved, until your registration matches all the features and plugins used in the project.

Some functions that use save/load capability don’t work in the trial / demo. For example, "Clone channel" and the "Save preset as..." menu options.

All other functions in the FL Studio demo are fully unlocked. Some plugins may give static (white noise) or silence at regular intervals as part of the trial / demo limitations. FL Studio trial / demo is the equivalent of the FL Studio Producer Edition + All plugins bundle.
System requirements:

2Ghz Intel Pentium 4 / AMD Athlon 64 (or later) compatible CPU with full SSE2 support. The faster your CPU and more cores it has the more you will be able to do simultaneously. Download and test the trial / demo!
32 or 64 Bit versions of Windows 10/8.0/8.1/7, Vista, XP (service pack 3)
(or) Intel Mac with Boot Camp / Windows.
Running XP (service pack 3), Vista or Windows 10/8.0/8.1/7 (in 32 or 64 Bit)
(or) Intel Mac with OS X 10.8 or 10.9 for the
FL Studio for Native MacOS (Test program / No official release yet)  
1 Gb or more RAM recommended
2 Gb free disk space
Soundcard with DirectSound drivers. ASIO/ASIO2 compatible required for audio recording (FL Studio installs with generic ASIO4ALL drivers)

Test before you buy!

The faster your CPU, the more instruments and effects you will be able to use at the same time. The more RAM you have, the more samples you will be able to load and play back smoothly.
No  registration or activation needed.
To find out how FL Studio behaves on your machine don't guess, please download the trial / demo and try it out for yourself so you know what you are getting. See this page in the manual for tips on improving performance a few simple tweaks can go a long way.

Installation and registration instructions:

The trial / demo is the official installer

When you buy FL Studio or grab a Lifetime Free Update,  you will install the latest version from above. Then unlock it, to the level you purchased, by entering your 'my account' sign in details in the FL Studio about window. It only takes seconds to activate the program. If you have installed the latest FL Studio trial / demo you have already downloaded all the data you need to own it!