You have different way to say it in french, if we use Je suis fatigué. as default

We have few others informal way to say it:

Je fatigue.

J’suis fatigué.

Jsuis fatigué.

Chuis fatigué.

Ch’u fatigué.

Ch’fatigué.

please note that these are familiar and often not correct while writing, they are more used for example when speaking to a close friend or a family member