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J.A.C.K.

Input—per 1M tokens
Output—per 1M tokens
Context—tokens
WeightsClosed

About

J.A.C.K. is ranked #7 of 27 in game level editors on Inferse. It runs on Linux, macOS, Windows.

Compared on game level editors

Free plan
Yesjack.hlfx.ru

Facts

Purpose
J.A.C.K. is a level editor for games using Quake-style BSP architecture.jack.hlfx.ru · 2 Oct 2026
Intended users
The editor aims to serve people designing levels for classic games and mods, including Quake and Half-Life.jack.hlfx.ru · 2 Oct 2026
Supported games
The editor supports Quake, Half-Life, Quake II, Quake III, and Hexen II.jack.hlfx.ru · 2 Oct 2026
Map formats
It can import and export VMF maps, though VMF support is beta and does not include Displacements.jack.hlfx.ru · 2 Oct 2026
Extensibility
Plugins can add capabilities such as brush primitives, texture and model formats, and game configurations with import and export formats.jack.hlfx.ru · 2 Oct 2026
Editing tools
Features include curved surfaces, triangulation, UV-Lock, multiple VisGroups, and automatic selection in 3D views.jack.hlfx.ru · 2 Oct 2026
Map size
The editor supports levels up to 262144 × 262144 units.jack.hlfx.ru · 2 Oct 2026
Autosave
Users can configure autosave to protect projects from editor crashes or design errors.jack.hlfx.ru · 2 Oct 2026
Distribution
J.A.C.K. is donationware distributed freely, and the donation amount is up to the user.jack.hlfx.ru · 2 Oct 2026
Support
Users can submit error reports and feature requests through the project forums; the software is provided without warranty.jack.hlfx.ru · 2 Oct 2026
Downloads
The official download page lists Windows and 32-bit and 64-bit Linux packages.jack.hlfx.ru · 2 Oct 2026
Development
The maker says J.A.C.K. has been in development since August 2013.jack.hlfx.ru · 2 Oct 2026

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Where it ranks on Inferse

Sources