String is one of those resources you never think about until you need a stack of it for wool, beds, leads, fishing rods, scaffolding, or crossbows. It is also one of the easier drops to farm. In Minecraft 26.2 Java Edition the fastest dedicated source is a spider spawner; if you do not have one, a general mob farm or a couple of alternatives cover it.

This guide ranks the options and walks through the spider-spawner build. It is part of our Minecraft farm guides collection for 26.2.

Tested on: Minecraft 26.2, Java Edition, vanilla survival. Spawner rates are documented behavior; output depends on how well you light the surrounding caves so the spawner is the only spider source in range.

Where string comes from

String drops from:

  • Spiders and cave spiders (0-2 string, more with Looting). The main farmable source.
  • Cobwebs broken with a sword or shears, which yield string.
  • Bartering with piglins, as an occasional minor return (not efficient for string specifically).
  • Cats, as an occasional gift, and fishing, as junk (both incidental).

For volume, you want spiders. The two practical builds are a spider spawner farm and a general mob farm that collects string alongside everything else.

Option 1: spider spawner farm (fastest)

If you have found a spider or cave spider dungeon spawner, it is the best dedicated string source: a fixed spawn point that produces spiders continuously as long as a player is in range and the area is dark.

The build:

  1. Light the surrounding caves. A spawner only runs at full rate when it is the only valid spawn surface in range. Light every nearby cave so all spider spawns happen at your spawner.
  2. Enclose the spawner room. Keep it dark inside the spawner's activation range so it keeps producing.
  3. Funnel the spiders. Spiders are wide (a 2x1 hitbox) and climb walls, so a string farm uses water streams plus a flushing system or a campfire/lava trap to kill them and drop string. Spiders climbing walls is the classic headache; smooth, climb-proof funneling (water below, overhang above) keeps them where you want them.
  4. Collect. Hoppers under the kill area feed string and spider eyes into chests.

Spiders can climb walls and squeeze through gaps, so a string farm needs more care than a zombie or skeleton farm. Use water to push them and an overhang or trapdoor lip so they cannot climb back out of the kill area.

Cave spider spawners (from mineshafts) are smaller (1x1 hitbox) and easier to funnel, but cave spiders are poisonous, so build the kill chamber so they can never reach you. Regular spider spawners are bigger to funnel but safer to AFK near.

Option 2: general mob farm (no spawner needed)

If you have no spider spawner, the simplest answer is a general mob farm. A dark-room grinder spawns spiders alongside zombies, skeletons, and creepers, so you collect string as part of the mix along with bones, gunpowder, and arrows.

This is less string-dense than a dedicated spawner, but it requires no rare spawner and gives you a pile of other useful drops at the same time. For most players without a spawner, the general mob farm is the right call.

Option 3: the easy alternatives

  • Cobwebs. Found in mineshafts and ancient cities, broken with a sword they drop string. Not renewable, but a quick early stack.
  • Cats. A tamed cat occasionally gifts string when you sleep. Trivial, but free if you keep cats.

These are stopgaps, not farms. For any real volume use a spawner or a mob farm.

AFK placement and chunk loading

A spawner runs while a player is within 16 blocks of it (spawner activation range) and the chunk is loaded. A dark-room farm follows the usual 24-128 block spawning spheres. Either way, keep your AFK spot in range and force-load the chunks for passive operation:

/forceload add <farm-x> <farm-z>

The Mob Spawner Optimizer helps you place the AFK point correctly, and the chunk borders and forceload guide explains the ticket levels a passive farm needs.

Server performance

A spider farm is lighter than a full mob grinder, but any spawning farm adds entity load. If you run a server, size it with the Server RAM Calculator and pick a host on real entity performance with the hosting comparison. The lag and stutter guide covers the settings that help if a single-player world chugs near the farm.

Common mistakes

Spawner barely produces. The surrounding caves are not lit, so spiders spawn there instead of at your spawner. Light everything in range so the spawner is the only spider source.

Spiders climb out of the farm. No overhang or climb-proof lip. Add a trapdoor or block overhang so spiders cannot scale the walls back out of the kill area.

Cave spiders poisoning you. The kill chamber lets them reach your position. Seal it so cave spiders can never path to you; their 1x1 size lets them fit through small gaps.

Farm stops when you move. You left the spawner's 16-block range or the chunks left simulation distance. Stay close to a spawner farm and force-load the chunks.

A spider spawner is also a foundation for an XP farm, since you can kill the spiders yourself for experience. For a no-spawner approach that collects string among many drops, build the general mob farm.

This guide is part of our Minecraft farm guides collection for 26.2.

Frequently asked questions

What is the fastest way to farm string in Minecraft 26.2?

A spider or cave spider spawner converted into a farm is the fastest dedicated string source. Light the surrounding caves so the spawner is the only spider source in range, funnel the spiders with water, and collect the string with hoppers.

How do I farm string without a spider spawner?

Build a general dark-room mob farm. It spawns spiders alongside other hostile mobs, so you collect string together with bones, gunpowder, and arrows, no rare spawner required.

Why is my spider spawner farm so slow?

Almost always unlit caves nearby stealing spawns. A spawner only produces at full rate when it is the only valid spawn surface in range, so light every cave around it.

How do you stop spiders climbing out of a string farm?

Add an overhang or trapdoor lip above the walls so spiders cannot scale back out of the kill area, and use water streams to push them toward the kill point rather than relying on gravity alone.

Sources & further reading: