Sissynator

You can use the following url parameters to automatically set the options:

folder - Folder name that should be selected
shuffle - Set to 1 to activate image shuffling
bpm - Beats per minute
next - After how many beats the next image appears
limit - Limit the number of images
mantra - Show your mantra on top of the screen. Any text supported, can be with spaces
autoplay - After how many seconds the slideshow automatically starts
On mobile devices there will probably be no sound, because it requires a user interaction.

Folder:

just select a folder with images

Manually select files

select all files, works on mobiles

Shuffle images

Settings import:

You can paste here a link with settings to automatically apply them

BPM:

Set to 0 to just show the gallery.

Next image:

Set to 0 to disable the automatic slideshow.

Limit:

Set to 0 to use all files.

Mantra:

You can put here mantra, it will be displayed on top of the page

Sissynator, local folder version