Are these real Binding of Isaac items?

Yes. The names are real items from the game: passive items, active items, and trinkets. They are text names only, with no copyrighted sprites.

How do I run a build-around challenge?

Roll one item and have everyone start a run forced to build around it, or roll a few passives and theorycraft how the synergies would stack.

Can I filter to active, passive, or trinket items?

Yes. The filter narrows the roll to passive items, active items, or trinkets.

Yes. There is no sign-up and no limit on how many items you roll.

Is this the same as an Isaac item randomizer?

Yes, an Isaac item randomizer is exactly what this is. Press Generate for one random item, or roll a handful with No repeats on to randomize a full set for a run or challenge.

Random Isaac item generator

Your random items appear here.

Options

How many

No repeats

Filter

Make your own listPick from your own items — prefilled with a few examples to get you started.

Updated August 2026

Press Generate on this Isaac item randomizer for a random item from The Binding of Isaac (TBOI): a game-warping Brimstone, a humble Sad Onion, a Yum Heart, a Curved Horn trinket. Roll one, or pull a handful with No repeats on to sketch out a whole imaginary run.

Isaac is about the items you stumble into, so rolling them is half the fun and most of the theorycrafting. Pull three passives and picture how they stack: does Brimstone alongside Polyphemus stay a screen-clearing laser, or do the modifiers fight each other? Some pairings are famous, like the flies a Guppy set builds up, and half the joy is spotting a sleeper combo before you have to play it. Set a build-around challenge where everyone starts forced to make the same rolled item work, or settle an argument about which item is stronger by rolling both.

The filter matches what you want to think about: passives for a stacking puzzle, actives for an on-demand effect you plan a charge around, or trinkets for the small modifiers that change a run at the edges. Leave it on All for the full grab-bag the game throws at you.

Switch to the grid to compare a spread of items, or the wheel to land one pick live on stream. It is a natural fit for streams and community races: let the draw decide a run's gimmick, or hand everyone the same starting item and see who reads it best. Copy a set into a Discord thread, or share a link that carries your filter and count so everyone theorycrafts from the same draw. The names are real items from the game, text only, so every roll is something you could genuinely find on a run.

No sign-up, and no cap on how many times you spin.

Frequently asked questions

Are these real Binding of Isaac items?: Yes. The names are real items from the game: passive items, active items, and trinkets. They are text names only, with no copyrighted sprites.
How do I run a build-around challenge?: Roll one item and have everyone start a run forced to build around it, or roll a few passives and theorycraft how the synergies would stack.
Can I filter to active, passive, or trinket items?: Yes. The filter narrows the roll to passive items, active items, or trinkets.
Is it free?: Yes. There is no sign-up and no limit on how many items you roll.
Is this the same as an Isaac item randomizer?: Yes, an Isaac item randomizer is exactly what this is. Press Generate for one random item, or roll a handful with No repeats on to randomize a full set for a run or challenge.

Every item this generator can roll

The full pool, split into passives, actives and trinkets, with what each one does.

Name	What it does
Passive
Sad Onion	Fires faster.
The Inner Eye	Triple shot, slower fire rate.
Mutant Spider	Quadruple shot with reduced damage per tear.
20/20	Double shot.
Brimstone	Tears become a charged blood laser that pierces everything in a line.
Mom's Knife	Replaces tears with a knife you charge and throw.
Polyphemus	One huge slow tear that carries damage through the enemy it kills.
Sacred Heart	Full heal, large damage up, and strongly homing tears.
Magic Mushroom	Every stat up and a heart.
Cricket's Head	Large flat damage increase.
Cricket's Body	Tears burst into four smaller tears on impact.
Death's Touch	Piercing scythe tears with a big damage up.
Spoon Bender	Tears home in on enemies.
Number One	Fires much faster, short range.
Steven	Small damage up.
The Halo	Every stat up by a small amount.
Technology	Tears become a piercing red laser.
Technology 2	Adds a constant thin laser alongside weaker tears.
The Ludovico Technique	One floating tear you steer around the room.
Godhead	Homing tears with a damaging aura around them.
Soy Milk	Enormous fire rate, tiny damage per tear.
Tough Love	Chance to fire a tooth that deals heavy damage.
Ipecac	Explosive arcing tears that also hurt you up close.
Proptosis	Tears start huge and shrink as they travel.
Chocolate Milk	Tears charge; a full charge hits far harder.
Dr. Fetus	Fires bombs instead of tears.
Epic Fetus	Call in a targeted missile strike.
Monstro's Lung	Charge up and release a shotgun spray of tears.
Haemolacria	Tears arc and burst into a spread on landing.
Anti-Gravity	Tears hang in place, then fire.
Trisagion	Tears become short piercing beams of light.
Tiny Planet	Tears orbit you and never expire.
Continuum	Tears wrap around the screen edges.
Rubber Cement	Tears bounce off walls.
My Reflection	Tears boomerang back to you.
Cupid's Arrow	Tears pierce enemies.
Fire Mind	Tears can explode into flames.
Mysterious Liquid	Tears leave damaging creep.
Lost Contact	Tears block enemy shots.
Pop!	Tears become eyeballs that keep bouncing around the room.
Compound Fracture	Bone tears that shatter into shards.
Uranus	Ice tears that freeze enemies.
Mars	Double-tap a direction to dash.
Pinking Shears	Sends your body off to fight.
A Lump of Coal	Tears grow stronger with range.
Blood of the Martyr	Damage up.
Cat-o-nine-tails	Damage up.
A Small Rock	Damage up, slightly slower.
Lucky Foot	Luck up, better pill and drop odds.
Mom's Heels	Range up.
The Belt	Speed up.
Wooden Spoon	Speed up.
Odd Mushroom	Fires faster with slightly less punch.
Torn Photo	Fire rate and speed up.
Mom's Eye	Chance to fire an extra tear backwards.
Mom's Wig	Chance to spawn friendly spiders.
Bloody Lust	Damage climbs as you take hits.
Lusty Blood	Damage climbs as you kill enemies.
Whore of Babylon	Large damage and speed up while on half a heart.
Empty Vessel	Flight and a familiar while you hold no red hearts.
Dead Cat	Nine lives, but health drops to one.
The Wafer	All damage taken is halved.
Holy Mantle	Blocks the first hit in each room.
Guppy's Collar	Chance to revive on death.
Camo Undies	Chance to turn invisible to enemies.
Pyromaniac	Explosions heal you instead of hurting.
Stigmata	Damage up and a heart container.
Meat!	Damage up and a heart container.
Raw Liver	Two heart containers and a full heal.
Placenta	Heart container and slow regeneration.
Breakfast	One heart container.
Lunch	One heart container.
Dinner	One heart container.
Dessert	One heart container.
Supper	One heart container.
Rotten Meat	One heart container.
Rosary	Fire rate up and three soul hearts.
Lard	Heart container and a damage bump.
Callus	Immune to spikes and floor creep.
Brother Bobby	Familiar that fires tears.
Sister Maggy	Familiar that fires strong tears.
Little Steven	Familiar with homing tears.
Little Chad	Familiar that drops half hearts.
Little Gish	Familiar firing slowing black tears.
Robo-Baby	Familiar firing a small laser.
Robo-Baby 2.0	Steerable familiar firing lasers.
Demon Baby	Auto-fires at anything nearby.
Ghost Baby	Familiar firing piercing spectral tears.
Rainbow Baby	Familiar firing random tear effects.
Incubus	Familiar copying your tears at full damage.
Twisted Pair	Two familiars copying your tears.
Lil Brimstone	Familiar firing a brimstone laser.
Abel	Familiar mirroring your movement and shots.
Cube of Meat	Orbital that grows each time you find it.
Ball of Bandages	Orbital that grows with each copy.
Halo of Flies	Two orbiting flies that block shots.
Distant Admiration	Orbiting fly that damages enemies.
Forever Alone	Orbiting fly that damages enemies.
Guardian Angel	Orbital that blocks enemy shots.
Sacrificial Dagger	Orbiting knife that shreds contact.
BFFS!	Familiars grow and hit much harder.
Bum Friend	Familiar trading coins for pickups.
Key Bum	Familiar trading keys for pickups.
Dark Bum	Familiar trading red hearts for soul hearts.
Sack of Pennies	Familiar dropping a sack of coins.
Mystery Sack	Familiar dropping a random pickup.
Rune Bag	Familiar dropping runes.
Umbilical Cord	Spawns a helper when you drop low.
Bobby-Bomb	Bombs home in on enemies.
Mr. Mega	Much larger bomb blasts.
Bomber Boy	Bombs explode in a cross.
Scatter Bombs	Bombs split into several smaller ones.
Brimstone Bombs	Bombs fire brimstone beams outward.
Butt Bombs	Bombs damage every enemy in the room.
Sad Bombs	Bombs fire tears in every direction.
Piggy Bank	Drops coins when you take damage.
Steam Sale	Shop items cost half as much.
Humbleing Bundle	Pickups drop in pairs.
The Compass	Reveals special rooms on the map.
Treasure Map	Reveals the whole floor layout.
The Blue Map	Reveals secret rooms on the map.
The Mind	Full map with every secret marked.
The Body	Doubles your heart containers, halves size.
The Soul	Soul hearts and a floating orbital.
Active
The D6	Rerolls every item in the room.
The D20	Rerolls every pickup in the room.
The D10	Rerolls the enemies in the room.
The D12	Rerolls the obstacles in the room.
The D8	Rerolls your speed and fire rate.
The D4	Rerolls all of your collected items.
The D1	Duplicates a random pickup in the room.
The D100	Rerolls the room and everything you hold.
Spindown Dice	Steps items down to the previous ID.
The Book of Belial	Big damage up for the room.
Book of Shadows	Brief invincibility.
Book of Revelations	Soul heart and a shot at a horseman.
The Necronomicon	Damages every enemy in the room.
The Bible	Flight for the room.
Anarchist Cookbook	Spawns troll bombs around the room.
Monster Manual	Summons a random familiar for the room.
Satanic Bible	Grants a black heart.
Telepathy for Dummies	Homing tears for the room.
The Poop	Drops a pile of poop.
Yum Heart	Heals one heart.
Razor Blade	Trade half a heart for a damage spike.
Kamikaze!	Explodes on your own position.
Mr. Boom	Drops one oversized bomb.
The Nail	Black heart, damage up, and you break rocks.
Tammy's Head	Fires a ring of tears outward.
Mom's Bra	Freezes every enemy in the room.
Mom's Pad	Frightens every enemy in the room.
Box of Spiders	Releases friendly blue spiders.
Shoop da Whoop!	Fires one big laser from your face.
My Little Unicorn	Invincible and damaging on contact.
The Candle	Throws a blue flame.
Red Candle	Throws a flame that lingers.
Guppy's Head	Spawns a swarm of blue flies.
Guppy's Paw	Converts a red heart into soul hearts.
Lemon Mishap	Spills a puddle of damaging creep.
Blank Card	Uses your held card without spending it.
Clear Rune	Uses your held rune without spending it.
Placebo	Uses your held pill without spending it.
Void	Absorbs items in the room for permanent stats.
Crooked Penny	Coin flip: double your pickups or lose them.
Mega Blast	A huge brimstone beam you steer.
Mega Mush	Become giant with enormous damage.
Glowing Hourglass	Rewinds to the previous room.
The Hourglass	Slows every enemy in the room.
Teleport!	Teleports you to a random room.
Undefined	Teleports you to a special room.
Moving Box	Packs up pickups and carries them along.
Dad's Key	Opens every door in the room.
How to Jump	Jump over gaps and obstacles.
Jar of Flies	Stores flies from kills and releases them.
Jar of Wisps	Adds a permanent orbiting wisp.
Book of Virtues	Spawns wisps that fight for you.
Berserk!	Melee frenzy with a swinging weapon.
Potato Peeler	Trade a heart container for damage.
Plan C	Kills everything, then kills you.
Pause	Freezes enemies where they stand.
Delirious	Summons a friendly boss to fight for you.
Damocles	Doubles item pedestals with a lethal catch.
Wooden Nickel	Chance to produce a coin.
Bag of Crafting	Grinds eight pickups into an item.
Trinket
Petrified Poop	Poop drops pickups more often.
Swallowed Penny	Drops a coin when you take damage.
Cancer	Fire rate up.
Tick	Drains health from bosses; cannot be dropped.
Match Stick	Bombs drop more often.
Child's Heart	Hearts drop more often.
AAA Battery	Active item charges one step sooner.
Curved Horn	Damage up.
Rusted Key	Keys drop more often.
Lucky Rock	Broken rocks drop coins.
Wiggle Worm	Fire rate up and wavy tears.
Ring Worm	Tears corkscrew erratically.
Flat Worm	Tears widen into a flat sheet.
Hook Worm	Tears travel in a zigzag.
Whip Worm	Tears fly noticeably faster.
Pulse Worm	Tears pulse between sizes as they fly.
Ouroboros Worm	Combines several worm tear effects.
Bloody Penny	Coins can drop half a red heart.
Burnt Penny	Coins can drop a bomb.
Flat Penny	Coins can drop a key.
Counterfeit Penny	Coins can drop extra coins.
Pinky Eye	Chance to fire a poison tear.
Push Pin	Chance for piercing, splitting tears.
Nose Goblin	Chance to fire a sticky homing tear.
Super Ball	Chance for tears to bounce.
Liberty Cap	Random mushroom item effect.
Mysterious Paper	Cycles between four paper effects.
Missing Page	Damages the room when you drop low.
Left Hand	Every chest becomes a red chest.
Store Key	The shop is always unlocked.
Cursed Skull	Teleports you away at low health.
Vibrant Bulb	Stats up while your active is charged.
Dim Bulb	Stats up while your active is empty.
Broken Magnet	Pulls nearby pickups toward you.
Faded Polaroid	Turns you invisible from time to time.
Duct Tape	Familiars stay where you leave them.
Rosary Bead	Chance for a soul heart on clear.
Safety Cap	Pills drop more often.
Ace of Spades	Cards and runes drop more often.
Watch Battery	Batteries drop more often.
Purple Heart	More enemies spawn as champions.
Fish Head	Spawns an attack fly when you are hit.
Perfection	Huge luck up, lost the moment you take a hit.