For Chrome OS on Chromebook, you can use the following boards with the Web Editor:

• Arduino UNO Rev3
• Arduino Mega 2560 Rev3
• Arduino Nano (ATmega328)
• Arduino Nano 33 IoT
• Arduino Micro
• Arduino Leonardo
• Arduino Zero
• Arduino MKR 1000 WiFi
• Arduino MKR WiFi 1010
• Arduino MKR Zero
• Arduino MKR Fox 1200
• Arduino MKR WAN 1300
• Arduino MKR GSM 1400
• Arduino MKR NB 1500

Can be made compatible with additional configuration:

• Arduino UNO WiFi Rev2. Setup instructions here.
• Arduino Nano RP2040 Connect. Setup instructions here.

Retired boards:

• Arduino 101
• Arduino Esplora
• Arduino Pro
• Arduino Pro Mini (ATmega328)

Third-party boards are not supported on Chrome OS.