Skip to main content
Sinister DM Tools

A minimalist DM toolkit — easy to learn, easy to set up.

Only the DM pays. Players always join free.

Create a campaign, start a session, and share a code in minutes.

Everything you need to run tonight's session

Start with the core DM tools, then open the full toolkit when you need it.

Fast setup
Players join free
Built for live play
🗺️

Interactive Virtual Tabletop

Upload maps with configurable grids, place and drag tokens for PCs and NPCs, and share the live tabletop with players in real time. Full canvas-based VTT built right in.

⚔️

Initiative Tracker

Track HP, temp HP, AC, and effects per character. Tiebreaker rolls, tactical notes, and clear turn order — everything in one place during combat.

🏰

Location & Room Tracker

Organize buildings and rooms with exploration status, threat levels, and assigned NPCs. Designed to stay out of your way during a live session.

Explore the full toolkit
👹

NPC & Monster Library

Create an NPC or monster once, reuse it across all your campaigns. Stat blocks, images, voice recordings, and room assignments — all in one card.

🧙

Player Character Management

Track PC status, HP, deaths, and replacements. Players manage their own characters in real time during live sessions.

🎲

Live Multiplayer Sessions

Share a session code and your players join instantly. Separate DM and player views with real-time sync for initiative, maps, and tokens. Players always free.

🎞️

Animated Battle Maps

Use animated GIF and video battle maps on the VTT. Looping animations play live for both DM and players — no extra setup required.

📅

In-World Calendar

Track campaign time with a fully customisable in-world calendar. Define your own months, week lengths, and year rules — then log session events and world happenings by date.

🗾

Campaign Maps

Upload world and region maps and share them with players. Control exactly what each player can see and mark points of interest as the campaign unfolds.

Choose Your Plan

Every plan starts with a free 14-day trial. No credit card required.

Basic: 1 campaign, 1 GB storage
Pro: unlimited campaigns, 5 GB storage, priority support

Basic

Best for one campaign at a time

$ 2.99 /month
1 campaign 1 GB storage
  • ✓ 14-day free trial
  • ✓ 1 active campaign
  • ✓ 1 GB storage
  • ✓ Full virtual tabletop
  • ✓ All DM tools included
  • ✓ Players join free

Run your next session without the setup headache.

Try Sinister™ free for 14 days — no credit card needed. Only $2.99/month (Basic) or $5.99/month (Pro), and your players always join free.

Sinister DM Tools

Select or Create a Campaign

First Session Checklist

0/4 complete
  1. Create your first campaign
  2. Open a campaign workspace
  3. Start a live session
  4. Copy and share your session code
Create New Campaign:
Sinister DM Tools

Campaign

format_list_numbered Initiative Tracker

Round: 1
Use Next Turn to advance through combat. When it cycles back to the top, the round will advance automatically.
flash_on Apply Effect to Multiple:
Effect Name: Duration:
swords Bulk Damage/Healing:
Select combatants using checkboxes, enter damage/healing amount, then click apply.
SelectNameClassInitHPACEffect 1 (Name / Rounds)Effect 2 (Name / Rounds)Effect 3 (Name / Rounds)Effect 4 (Name / Rounds)Notes

Manual Add to Initiative:

Random Encounter:

home Location Tracker

Add New Building/Location:
Building Name:

people NPCs & Monsters

add_circle Add NPC/Monster
upload_fileImport / Export Bestiary JSON

Paste or upload a JSON bestiary file to import. Each creature must include a rulesets array. Duplicate names are skipped.

sticky_note_2 General Notes

Campaign Sessions

Session Analytics

Category Metric Value
Loading analytics…

Campaign Progress Over Time

No session timeline data yet.

Attendance metrics are not tracked yet. Add attendance tracking to enable per-session player attendance analytics.
List options

No sessions yet. Create your first session above.

person Player Characters

add_circle Add Player Character

Battle Maps

Map Management
Upload New Map:
Recommended: PNG/JPG/WebP or MP4/WebM, up to 10MB
Battle Maps Library

Select a map from above to load the virtual tabletop