You can also use Jamis Buck's NPC generator (found here at EN World's download section).
Sample 15th level Wizard (is less than 10 seconds):
Abdallah, male human Wiz15: CR 15; Size M (5 ft., 9 in. tall); HD 15d4+30; hp 67; Init +1 (+1 Dex); Spd 30 ft.; AC 11 (+1 Dex); Attack +6/+1 melee, or +8/+3 ranged; SV Fort +7, Ref +6, Will +10; AL NE; Str 8, Dex 12, Con 15, Int 19, Wis 13, Cha 12.
Languages Spoken: Abyssal, Aquan, Auran, Common, Draconic, Dwarven, Goblin, Ignan, Infernal, Sylvan, Terran, Undercommon.
Skill points: Wiz 116
Skills and feats: Bluff +8, Concentration +19, Craft +22, Disable device +10, Hide +7, Intimidate +5, Knowledge (religion) +22, Listen +1, Move silently +1, Scry +22, Speak language +8, Spot +1; Combat casting, Craft staff, Craft wand, Empower spell, Enlarge spell, Exotic weapon proficiency (crossbow, hand), Extend spell, Maximize spell, Quicken spell, [Scribe scroll], Simple weapon proficiency (dart).
Possessions: 59,000 gp in gear.
Wizard Spells Known (4/5/5/5/5/4/3/2/1): 0th -- Arcane Mark, Dancing Lights, Daze, Detect Magic, Detect Poison, Disrupt Undead, Flare, Ghost Sound, Light, Mage Hand, Mending, Open/Close, Prestidigitation, Ray of Frost, Read Magic, Resistance. 1st -- Charm Person, Grease, Identify, Mage Armor, Magic Missile, Protection from Chaos, Silent Image, Sleep, Spider Climb. 2nd -- Alter Self, Blindness/Deafness, Invisibility, Knock, Levitate, Magic Mouth, Melf's Acid Arrow, Web. 3rd -- Blink, Dispel Magic, Fireball, Haste, Invisibility Sphere, Lightning Bolt, Slow, Suggestion, Summon Monster III. 4th -- Arcane Eye, Bestow Curse, Charm Monster, Fire Trap, Lesser Geas, Locate Creature, Polymorph Other. 5th -- Cone of Cold, Dominate Person, Hold Monster, Stone Shape, Summon Monster V. 6th -- Acid Fog, Analyze Dweomer, Chain Lightning, Control Water, Disintegrate, True Seeing. 7th -- Delayed Blast Fireball, Finger of Death, Forcecage, Mass Invisibility, Power Word, Stun, Spell Turning, Summon Monster VII, Teleport without Error, Vision. 8th -- Incendiary Cloud.