Free CS2 Demo Viewer & Analysis

Read the demo. Not the scoreboard.

RoundIQ is the free CS2 demo viewer and analysis tool where teams replay every round in 2D & 3D, break down the demo together, and turn it into decisions for match day.

How the CS2 demo viewer works

  1. 01

    Import

    Drop a .dem, link a FACEIT match, or pull from your Steam library. Personal or team workspace.

  2. 02

    Review

    Scrub the round, isolate the rotation, drop notes on the map. Together or solo.

  3. 03

    Prep

    Move the call into Strat Builder. Ship the board to the team before match day.

Player

Every angle of the CS2 demo. 2D, 3D, and POV.

  • Timeline, events, heatmaps, voice notes — one focused surface.
  • Switch to 3D for grenade arcs, POV follow, free-cam through any moment.
  • X-ray players, full body models, volumetric smokes — every detail of the round.
  • Sync playback and live annotations when the team reviews together.
RoundIQ 2D and 3D player view
RoundIQ Strat Builder with positions and grenade paths on Mirage

Strat Builder

Turn the call into a CS2 strat board the team can run.

Move from a reviewed round to positions, timings, and grenade paths in the same workspace. Reuse boards across the library, share them with players, ship them to match day.

Tactical editor
Place players, draw paths, define timings on a clean board built from the rounds you just reviewed.
Shared library
Team folders, community strategies, reusable building blocks — same environment.
Export and circulate
Capture boards for quick sharing when you brief players or staff outside the app.

Stuff Book

Every CS2 lineup, with the replay attached.

Save the smoke, flash, molly, or HE the team relies on. Each lineup carries its 3D throw replay, screenshots, and the teleport command — so a player can scrub the setup instead of guessing from a title.

Built around the game

Speaks the game's language.

Every active duty map. Every grenade. The maps, the calls, the way you actually scrim.

FAQ

Questions about the CS2 demo viewer

What is RoundIQ?

RoundIQ is a free CS2 demo viewer and analysis tool. Upload a Counter-Strike 2 demo, replay every round in 2D and 3D, annotate the map, and turn what you find into strats for match day — on your own or with your team.

How do I review a CS2 demo?

Import a .dem file, then scrub any round on the timeline and read the demo instead of the scoreboard. Isolate rotations, follow a player in 3D, study grenade arcs, and drop notes on the map to explain why a round was won or lost.

Is RoundIQ free to use?

Yes. RoundIQ is free to start — no credit card required. Upload your first demo, review it in full, and explore the 2D and 3D player before deciding whether a paid plan fits you or your team.

Can I watch demos in both 2D and 3D?

Yes. Switch between a clean 2D tactical map and a full 3D replay with player models, volumetric smokes, grenade trajectories, and free-cam, so you can study any moment of the round from any angle.

How do I import my demos?

Drop a .dem file, paste a FACEIT match link, or pull a match straight from your Steam library. Demos load into a personal or team workspace where every match stays organized and ready to review.

Can my team review demos together?

Yes. RoundIQ supports live collaboration with synced playback and shared annotations, so coaches, analysts, and players can break down the same demo together in real time, even remotely.

What is the Strat Builder?

The Strat Builder is a tactical editor where you place players, draw paths, and set timings on a clean board built from the rounds you just reviewed. Save strats to a shared team library and export boards to brief the squad.

Does RoundIQ work with FACEIT and Steam matchmaking?

Yes. You can analyze FACEIT matches and Steam Premier or matchmaking demos. Link a match or upload the .dem and RoundIQ parses it into a fully reviewable, round-by-round breakdown.

Why look past the scoreboard?

The scoreboard tells you what happened; the demo shows why. Reading the demo reveals the positioning, utility usage, and decision-making that a final score hides — the details that actually help a team improve.

Try it on your next demo.

Free to start. No credit card. Drop a .dem and see how the round reads.