HOI4 Map Editor v0.1.0-preview.5

Preview.5 focuses on safer State editing, Strategic Regions, and presentation improvements.

Highlights:

• Strategic Region membership editing is available with Select, Brush, Fill, Lasso, Undo/Redo, validation, and Save support.
• Remove Core and Remove Claim actions are available in the State Inspector.
• Country Borders is available as an overlay based on effective State ownership.
• Initial-bookmark effective State history displays correct dated Owner/Controller presentation.
• Granular dated-history protection ensures only values conflicting with applicable dated history are protected.
• Editor-wide UI/UX is consolidated with clearer validation and status feedback.
• Custom-map, sparse-ID, source precedence, and project compatibility are improved.
• Windows x64 and Linux x86_64 preview packages are included.

Keep an independent backup of mods edited with this preview.

HOI4 Map Editor v0.1.0-preview.4

Preview.4 focuses on compatibility, map visualization, project safety, and editing workflow.

Highlights:

• Political View is available as a map overlay.
• Resources is a separate read-only overlay sourced from the active state session.
• The Base Game Data selection is persisted and validated independently from project data.
• Project startup and save flows are hardened for isolated, external projects.
• Windows and Linux release packages are built and validated in CI.

Resources overlay is read-only.

HOI4 Map Editor v0.1.0-preview.1

First public preview of HOI4 Map Editor, a standalone (unofficial) tool for editing Hearts of Iron IV province maps and state history files. Not affiliated with or endorsed by Paradox Interactive. No HOI4 or Paradox assets are distributed.

This is preview software. Keep an independent backup of your mod.

Province editing

• Color editing, terrain/definition editing, and coastal recalculation.
• Atomic Province Map Save: BMP/CSV candidates are prepared, validated, and
  backed up before the mod files are replaced.
• Export Province Map as a folder or ZIP archive without touching the open
  project.
• Undo and Redo across province edits.
• Contextual search with focused navigation to a province on the map.

State editing

• State creation and removal, and province-to-state assignment.
• State Brush, Lasso, and Fill tools for assigning or unassigning provinces.
• Owner, controller, colors, cores, claims, resources, buildings, and victory
  points editing in the State Inspector.
• Review State Changes → Validate in a temporary workspace → Apply State
  Changes with backup, rollback, and interrupted-save recovery.
• Isolated round-trip validation before any state file is written.

Interface

• Separate Provinces and States workspaces with independent remembered Map
  Views and overlays.
• Map Views (Province Colors, Province Types, Terrain, Continents, Coastal,
  States, Political) and overlays (Rivers, Adjacencies, Province/State
  Borders, Image Overlay).
• State Inspector as an overlay drawer that no longer resizes the map
  viewport.
• Application Settings and Project Settings, including a language selector.
• Six interface languages: English, Português do Brasil, Español, Français,
  Русский, and 简体中文. Missing translations fall back to English rather
  than showing a blank or broken label.
• Contextual search with focused map navigation.

Known limitations

• Windows x64 only.
• Game localization and metadata (province/state names from HOI4's own
  localization files) are not yet loaded; the editor shows raw identifiers.
• Game flags and icons (.gfx/.dds) are not yet loaded.
• Adjacencies does not yet have a complete dedicated editing workspace.
• Strategic Regions and Continents do not yet have dedicated workspaces.

Verify your download

Get-FileHash ".\HOI4-Map-Editor-v0.1.0-preview.1-windows-x64.zip" -Algorithm SHA256

The result must match HOI4-Map-Editor-v0.1.0-preview.1-windows-x64.zip.sha256 exactly.

This build is not code-signed; Windows SmartScreen may warn on first run. See Troubleshooting before running it if you see a warning.