FPDoc Online
The Lazarus reference, every class, property and routine of the LCL and LazUtils, out of the FPDoc files the Lazarus team writes, readable and searchable.
An experiment
FPDoc Online is a simple trial of ways to make the Lazarus reference easy to read and search, and perhaps, later, a way for the community to help improve it.
It is not the official documentation. It was built from one development snapshot, Lazarus main 2dfa93c66e of 10-22-2026, so it is only as accurate as that snapshot and the FPDoc files in it.
LCLLazarus Component Library: forms, controls, graphics and the widget sets behind them.98 units, 25688 entries, 53% describedLazUtilsLazarus utilities without the LCL: files, UTF-8, configuration, logging, lists.62 units, 3693 entries, 76% describedFreeTypeThe FreeType font engine in Pascal, as Lazarus uses it to draw text.20 units, 1405 entries, 16% described
The descriptions are the Lazarus team's, under CC BY-SA 4.0; the declarations come from the Lazarus sources.