J.A.C.K.
- Android app
- Not listed
- Free plan
- No
- Runs on
- Linux, Mac, Windows
Summary
J.A.C.K. is a level editor for games that use Quake-style BSP architecture. It is designed for people making levels for classic games and mods, and supports Quake, Half-Life, Quake II, Quake III, and Hexen II. Editing tools include curved surfaces, triangulation, UV-Lock, multiple VisGroups, and automatic selection in 3D views. The editor supports levels up to 262144 × 262144 units, and users can configure autosave to help preserve projects after crashes or design errors. J.A.C.K. can import and export VMF maps, but that support is beta and does not include Displacements. Plugins can add brush primitives, texture and model formats, and game configurations with import and export formats. It also supports archive extraction and script editing. J.A.C.K. is available for Windows, Linux, and macOS, and is distributed freely as donationware. A Steam version is listed at 14.99 USD per once.
Who it is for
J.A.C.K. suits people designing levels for the classic games it supports, including Quake and Half-Life. Its donationware release is free to use, with a Steam version also listed.
What is good
- Supports Quake, Half-Life, Quake II, Quake III, and Hexen II.
- Includes curved surfaces, triangulation, and UV-Lock.
- Autosave can be configured.
- Available for Windows, Linux, and macOS.
- Distributed freely as donationware.
What to know first
- VMF map support is beta.
- VMF support does not include Displacements.
- Software is provided without warranty.
Verdict
J.A.C.K. provides level-editing tools for a defined set of classic games and modding projects. Note the beta limits on VMF support if that format is important to your work.
J.A.C.K. plans and pricing
All plansCompared 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
Best J.A.C.K. alternatives
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Where it ranks on Everything Xiaomi
- Best Game Level Editors in 2026#15 of 27
- Best Game Modding Tools in 2026#14 of 24
Is J.A.C.K. yours?
Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.
Sources
- jack.hlfx.ru/en/· checked 2 Oct 2026
- jack.hlfx.ru/en/features.html· checked 2 Oct 2026
- jack.hlfx.ru/en/donate.html· checked 2 Oct 2026
- jack.hlfx.ru/en/support.html· checked 2 Oct 2026
- jack.hlfx.ru/en/download.html· checked 2 Oct 2026