Exact production planning for Satisfactory.

Draw a factory as machines and belts; the solver works out every rate. Runs in the browser. Free, with a tip jar.

account optional ·

01 · Features

What it does

Solver
Two-phase simplex. Every rate on the canvas is the solution to the graph as drawn, re-solved on each edit.
Constraints
Belt Mk.1 to Mk.6 and pipe Mk.1 to Mk.2 caps, machine build targets, pinned source rates, sink demand, priority belts and container buffers, as hard limits.
Auto-plan
One target to a full chain. Miners are sized to fit, machines already placed are reused, the map's raw budget is respected.
Factory links
Belts between factories carry what the receiving factory needs. Several producers of one item add up; an auto-sized mine sizes to its consumers.
Game modes
The 1.2 Power Consumption and Recipe Parts Cost modifiers, rounded the way the game rounds them.
Ranker
All 109 alternate recipes, each forced into a whole-game production model and scored on what it saves in machines, items, power and raw resources. The same Rust engine as the desktop app, compiled to WebAssembly.
Save file
Reads purchased schematics and pending hard drives: unlocked, available at the MAM, locked. Parsed in the browser; the file is not uploaded.
Game data
Generated from the game's own data export and regenerated per patch: items, machines, recipes, build costs, extraction rates.
Sharing
View links are read-only. Collaborate links open the same editor for everyone on the link, with named cursors and edits synced live.
Wiki
Guides for a first factory, plus a reference for every item, machine and recipe, generated from the same catalog the planner uses.
Factory map
Desktop app, in the works. The save drawn on the game's terrain: buildings, belts, pipes, trains, resource nodes, uncollected slugs and spheres.
Runs on
Any modern browser. An account is only needed to sync plans between devices.
Price
Free, no ads. There is a tip jar on Ko-fi.

02 · Screenshots

Planner, ranker, sharing

From the release notes.

A factory on the planner canvas with Input and Output nodes at its edges
Planner. A factory with declared inputs and outputs.
The Ranker: preset lenses, the ranked table, and a recipe's breakdown
Ranker. Lenses, the table, one recipe's breakdown.
Two pioneers editing the same factory, each with a named cursor
Collaboration. Two cursors, one factory.

03 · Changelog

Recent releases

Bugs and requests go on the feedback board.

  1. now v0.19.5 · 29 October 2026
  2. v0.19.4 · 14 October 2026
  3. v0.19.3 · 14 September 2026
  4. v0.19.2 · 23 August 2026
  5. v0.19.1 · 23 August 2026
roadmap ↗

04 · About

Who makes it

Hi, I'm Ferdi. I build this on evenings and weekends, originally for my own playthrough. It is free. If it is useful to you, a coffee covers the hosting.