Arduino ESP32 filesystem uploader

Arduino plugin which packs sketch data folder into SPIFFS filesystem image, and uploads the image to ESP32 flash memory.

Installation

Make sure you use one of the supported versions of Arduino IDE and have ESP32 core installed.
Download the tool archive from releases page.
In your Arduino sketchbook directory, create tools directory if it doesn't exist yet.
Unpack the tool into tools directory (the path will look like <home_dir>/Arduino/tools/ESP32FS/tool/esp32fs.jar).
Restart Arduino IDE.

On the OS X create the tools directory in ~/Documents/Arduino/ and unpack the files there

Open a sketch (or create a new one and save it).
Go to sketch directory (choose Sketch > Show Sketch Folder).
Create a directory named data and any files you want in the file system there.
Make sure you have selected a board, port, and closed Serial Monitor.
Select Tools > ESP32 Sketch Data Upload menu item. This should start uploading the files into ESP32 flash file system.

When done, IDE status bar will display SPIFFS Image Uploaded message. Might take a few minutes for large file system sizes.

File issues here on github, or ask your questions on the esp32.com forum.