What it is
poe.ninja is a web app that tracks Path of Exile's economy in real time, displaying prices of practically every tradeable item in the game, exchange rates between currencies, and a browsable database of builds being used by active players in the current league.
It's probably the most visited external site by the PoE community, alongside the official trade site. Almost any discussion about prices or build meta on Reddit or Discord ends with a link to poe.ninja.
What problem it solves
Path of Exile has a fully player-driven economy where prices fluctuate league to league and week to week based on supply and demand. Without a reliable tracker, knowing if an item is worth 5 chaos or 50 chaos requires experience and trading instinct. poe.ninja makes that knowledge accessible to anyone.
Beyond price tracking, it solves a secondary problem: which builds are performing well this league? Instead of searching outdated guides or guessing, poe.ninja shows you real player characters from the ladder, with their exact items, gems, and passive trees.
What people use it for
Daily trading: before buying or selling an item, you open poe.ninja to check the average price. If someone offers you an item for 10 divine and poe.ninja says it's worth 3, you know you're being scammed.
Currency conversions: PoE has dozens of currencies with fluctuating exchange rates. poe.ninja instantly shows you how many chaos a divine is worth, how many exalts a mirror, etc.
Build inspiration: if you want to play a specific archetype (say, a Lightning Strike build), you filter by skill and see the top 100 players using it. You can see their exact items and learn how to scale the build.
Meta research: which classes are most popular this league? Which skills are trending? poe.ninja tells you with real numbers, not Reddit opinions.
Informed crafting: before investing currency in crafting an item, you check how much the finished item is selling for in the market. If crafting cost exceeds sale price, you know it's not worth it.
How it complements other tools
poe.ninja in isolation is useful, but it shines combined with other tools. The typical workflow of a serious player is:
Design a build in Path of Building. Open poe.ninja to see how much the build's target items cost. If the total is affordable, go buy items with awakened-poe-trade or the official trade site. While playing, keep using poe.ninja to make real-time pricing decisions.
It's the ecosystem piece that connects theorycrafting with economy with gameplay.
Honest limitations
Only available in English. The interface is relatively simple but game terms (currency names, item types) are in English.
Data comes from scraping PoE's public API, meaning prices can have latency from minutes to hours on items with low activity. For very popular items it's near real-time, but rare items can have outdated prices.
Doesn't include data from Solo Self-Found (SSF) leagues where there's no trading. Only covers leagues with economy.
The interface is functional but dense. There's a lot of info on screen and for beginners it can feel overwhelming until you get used to it.
How to get started
Nothing to download or install. You go to poe.ninja from any browser and you're in.
The first thing you see is the Currency page, showing current exchange rates. To start getting familiar: navigate the top tabs (Currency, Fragments, Skill Gems, Unique Armours, etc.) and see what items are in each. The Builds tab is the most distinct — that's where you go to explore real ladder characters.
Once you understand the navigation, you'll use it constantly without thinking.