This is a tool to create a simple LittleFS filesystem image with some files, locally in the browser without uploading them to a server.
It is meant to be used with a Raspberry Pi Pico (RP2040), but not limited to it.
To use it, simply adjust parameters as needed (or select a preset), select files to include and click the corresponding button to create a .bin or .uf2 file.
The UF2 file allows easy flashing to the Raspberry Pi Pico: just press BOOTSEL while connecting via USB (or try the reboot button at the bottom of the page) and copy the file on the appearing drive.
If needed, the BIN file can be viewed and verified here: tniessen/littlefs-disk-img-viewer
Arduino Raspberry Pi Pico (RP2040):