Web-based tools for embedded GUI development

https://javl.github.io/image2cpp - An online tool for converting images into byte arrays suitable for monochrome displays such as OLEDs.

https://rop.nl/truetype2gfx - Online tool for TTF to Adafruit GFX font conversion.

https://hexrx.github.io/mcufont-converter-web - Online font converter tool for mcufont rendering library.

https://lopaka.app/sandbox - Drag and drop graphics creation for U8g2, Adafruit GFX, and Flipper Zero graphic libraries.

https://wokwi.com - Simulate embedded systems online with support for microcontrollers like Arduino, ESP32, STM32, and Raspberry Pi Pico, and displays like SSD1306, SH1107, IL9341, and 2.9" e-ink.