There are a total of 23 jobs in Final Fantasy III. Each job has its own level, not to be confused with character's level, and each of them maxed at 99 which mean that you have to grind 23 times for one character or 92 times for 4 characters.
Leveling up Jobs is important because each job has its own set of fixed stats and they increase faster than your stats from characters' level in early game so that you rely on higher job level to deal more damage.
Here is a basic concept: Damage = character stats + job stats (the actual formula is more complicated than that).
So if you plan for a perfect game, I recommend that you max all job levels as soon as get them.
Below is list of all jobs and their commands:
| Job | Job Commands | Command Description | Note |
|---|---|---|---|
| Freelancer | (None) | Default Job | |
| Warrior | Advance | Increase power and decrease defense. | |
| Monk | Retaliate | Increase defense and counterattack. | |
| Thief | Steal, Flee | Steal: steal an item, Flee: escape the battle (higher chance than normal escape). | Can unlock doors without using Magic Key. |
| Black Mage | Magic | Use white magic, limited at level 7. | |
| White Mage | Magic | Use black magic, limited at level 7. | |
| Red Mage | Magic | Use black and white magic, limited at level 5. | |
| Ranger | Barrage | Attack 4 times randomly, each hit is lower than the normal attack, but higher when 4 hits combined. | |
| Knight | Magic, Defend | Magic: Use level 1 white magic, Defend: increase defense power and cover team members when their HP is critical. | |
| Scholar | Study | Show enemy details; HP, weaknesses. | |
| Geomancer | Terrain | Use environmental attack, the environmental attack is random based on the areas/dungeon and success rate. | |
| Dragoon | Jump | Jump into the air and hit an enemy (about x2.5 of normal damage), the Jump may take 2 turns to finish. Cannot be targeted when jumping. | |
| Viking | Provoke | Provoke enemy to attack you and reduce enemy defense. | |
| Dark Knight | Souleater | Sacrifice HP to increase attack power. | |
| Evoker | Summon | Randomly summon level 1 and 2 summons. | |
| Bard | Sing | Sings a song based on equipped harp. | |
| Black Belt | Boost | Increase attack power. | |
| Devout | Magic | Use all white magic. | An upgraded version of White Mage. |
| Magus | Magic | Use all black magic. | An upgraded version of Black Mage. |
| Summoner | Summon | Summon level 3 summons. | An upgraded version of Evoker. |
| Sage | Magic | Use black and white magic, can summon level 1 and 2 summons. | An upgraded version of Red Mage. |
| Ninja | Throw | Throw Shurikens and weapons that deal huge damage. | |
| Onion Knight | Magic | Use all black and white magic. | Secret Job. Onion Knight can use all weapons except special weapons for job master. |