Limits

What	Limit
Canvas size	2048 × 2048 pixels. Larger imported images are scaled down. See Canvas Size.
Layers	16. See Layers.
PSD import	PSD files with more than 16 layers open flattened. Very large PSD files can’t be opened. See Opening PSD Files.
Undo	Limited by memory, not by a fixed number of steps.
Browser Storage	1 image. See Browser Storage.
Tab recovery	Starts after about 5 minutes. Kept for 7 days. See Tab Recovery.
Imported fonts	Kept until you reload Kleki.

Kleki also depends on your browser and device. A large canvas with many layers needs a lot of memory, especially on phones and older tablets. If Kleki gets slow, see Troubleshooting.