AirFPS

A very lightweight client-side mod that adds an FPS counter and other useful info to your screen without cluttering it.

In-game config menu: Press F9 (can be changed in the game's keybind settings) to open the AirFPS panel.
Optional modules: Besides FPS, you can toggle extra lines to see your real Ping on servers, RAM usage, or your coordinates (X, Y, Z).
Free positioning: While in the menu, you can simply click and drag the HUD to wherever you want on your screen. I've also included 4 quick-snap buttons if you want to align it perfectly to any of the corners.
Visual customization: Change the text scale to fit your monitor; Adjust the dark background opacity or remove it completely & Toggle the default Minecraft text shadow on or off
Colors & RGB: The text can have a fixed color, or you can enable "Dynamic Colors" (turns green if you're above 60 FPS, yellow if you drop to 30, and red if it's lagging). There's also an option to enable an animated Chroma (RGB) effect.
Client-side: Since it's a purely visual mod, you only need to install it on your client. You can use it on any server without issues.

DOWNLOAD ONLY FROM SECURE SOURCES!

This is the only official CurseForge page for downloading AirFPS. DO NOT DOWNLOAD FROM OTHER SITES OF DUBIOUS ORIGIN!