I've been building web-based pinout diagrams since 2013 when I started with the 20-pin Raspberry Pi.

I did the same for the Pico, the Pico 2 when it launched, and now the ESP32 C3 and C5 for a little variety.

The diagrams are all in HTML, based around plain ol' tables with lots of presentational magic to make them pretty. You can flip the boards around to get a pinout that matches the orientation of your project (as long as it's not rotated 90 degrees, sorry) and disable the interfaces you're not interested in.

They print out well, too!

Every time I share these I find another one of today's 10,000 so here you go, might be your lucky day 😆 -

• https://pico.pinout.xyz - Raspberry Pi Pico (original, non-W) pinout
• https://picow.pinout.xyz - Raspberry Pi Pico W pinout
• https://pico2.pinout.xyz - Raspberry Pi Pico 2 pinout
• https://esp32c3.pinout.xyz - ESP32 C3 DevKitC Pinout
• https://esp32c5.pinout.xyz - ESP32 C5 DevKitC Pinout

Feedback and suggestions for which board(s) to tackle next are welcome!