Seed Maps Compared: Chunkbase, mcseedmap, Amidst

The short version

Four websites and one desktop program cover almost all seed mapping today. Chunkbase is the oldest and broadest, with a finder for nearly everything and a decade of trust behind it. mcseedmap has the best sharing tools and the only support for data-pack worlds. seeds.gg is a community seed database with a map attached. Amidst is a Java desktop app that reads your game's own files and still has fans for old versions. Minecraft Tools, this site, puts everything on one map, measures its accuracy against the real game and says so on every page, and is the only one of the five with ore finders that model caves, Bedrock placement that was checked in-game, and an assistant you can ask questions.

If you want one recommendation: use whichever one you already trust for Java structures, because for the common ones all of them are right. The differences are in Bedrock, in ores, in the things around the map, and in how clearly each tool says what it does not know.

Who makes what

Three of the five run the same open-source core, cubiomes, which is why their Java biome maps agree with each other and with the game. Chunkbase wrote its own engine and usually has a new game version supported within days of its release. Amidst does something nobody else does: it loads the real Minecraft jar and asks the actual game code, so for the versions it supports it cannot be wrong, at the price of needing the game installed and of having stopped keeping up with new releases.

Where each one is better than us

• Chunkbase has finders we do not: fossils and lava pools. We skipped fossils on purpose, because whether one actually generates depends on terrain overlap rules our model cannot check reliably, and a finder that shows phantom fossils is worse than none. Lava pools are on the list. Chunkbase also simply has more years of people checking its answers.
• mcseedmap has the best share popover of the group, a link with or without the camera position and a PNG in two clicks, and it is the only site that maps data-pack worlds with custom generation. We copied the first idea; the second is a large second generator we have not built.
• seeds.gg has a community database of named, rated seeds and a page per seed. If you want to browse what other people found, that is the place. We chose not to generate a page per seed, because thousands of near-identical pages are thin content, and our finder pages already answer the searches.
• Amidst works offline, needs no browser, and for a 1.12 or 1.16 world it is the reference. If you keep an old world alive, it is still worth having.

Where we think we are ahead

Measured accuracy, published. Every structure type here carries a badge set from tests against the official Java server and the Bedrock Dedicated Server, and the accuracy guide lists the numbers. On Bedrock that shows: about half of mansion and shipwreck attempts do not generate in-game, so we mark them Approximate, and End cities are hidden rather than drawn where the Bedrock End has nothing. Other tools draw them.

Ores. Our diamond finder and ore finders replay the game's ore placement against a terrain model with caves, ravines and aquifers, which is what the deletion rule for exposed ore needs; against the real game, 97% of the diamonds shown were there. Chunkbase and mcseedmap do not have ore finders, and the one on seeds.gg draws fixed patterns rather than real generation.

One map. Villages, strongholds, slime chunks, trial chambers, the Nether and the End on one canvas with the biomes underneath, instead of one app per structure. A cave finder and a ravine finder that draws whole paths. A planner that scores base sites and orders a route. A slime seed finder that counts slime chunks in a farm's AFK area rather than only painting a pattern, and sister seeds that are scored instead of merely listed. An assistant that runs the same finders when you ask it a question. And a library that keeps your seeds, markers and completed structures across devices when you sign in.

Things that are the same everywhere

For Java villages, strongholds, monuments, mansions, temples and the other classics on a current version, all five tools agree, because the placement rules are public and well understood. Nobody has a secret better algorithm. If a coordinate differs between two tools, the version or the edition is set differently, and the troubleshooting guide applies to all of them.

All of the websites generate in your browser, so none of them see your world, and all of them are free to use for finding things. We charge for convenience, not for coordinates: Pro removes ads, raises the assistant's daily limit, makes the library unlimited and adds a large map export. Nothing a free user can find is hidden behind it. We settled that early, because Chunkbase set the expectation that finding things is free and we agree with it.

Two things we chose not to build

A fossil finder, for the reason above: we would show fossils that are not there, and the whole point of the badges is that an Exact marker is exact. And per-seed pages like seeds.gg's. They rank, for a while, but they are the definition of thin content, and a site that wants to be trusted for accuracy should not fill itself with pages that say nothing a map view does not. We would rather write twenty guides like this one.

That is the comparison as we see it in October 2026. If a row in the table is out of date, tell us through the contact page; the other tools improve too, and we would rather be corrected than wrong.