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DemoLens
What it is
DemoLens is a free browser-based viewer for Counter-Strike 2 match demos. It accepts .dem, .dem.gz, and .dem.zst files and parses them in the browser with WebAssembly, so demo files are not uploaded to DemoLens. Replay tools show a multi-level radar, grenade trajectories, player status, key presses, playback-speed controls, and kill markers. Analysis tools add grenade lineup pins, movement trails, heatmap-style pins, FOV cones, drawing mode, and kill-feed badges. Scoreboard and economy information, player performance metrics, percentile comparisons, and an integrity check against professional baselines are also included. For FACEIT demos, the viewer supports synchronized voice playback, per-player voice timelines with WAV export, and in-game chat translation. Its browser extension adds a one-click demo button and player scouting statistics to FACEIT match rooms. DemoLens requires a desktop browser such as Chrome, Edge, or Firefox; phones are not supported. Replays are 2D tactical views rather than 3D first-person footage. The project says it has no accounts, tracking, analytics cookies, or ads.
For and against
For
- Free plan with no account required
- Supports three common demo file formats
- Detailed replay and analysis tools
- FACEIT voice timelines with WAV export
- Browser parsing keeps demos off the service
Against
- Desktop browser required
- Phones are not supported
- Replays are 2D, not 3D first-person
- Translation fallback sends text to Google Translate
The verdict
DemoLens combines replay controls, tactical analysis, statistics, and FACEIT-specific tools in a free desktop viewer. Its main boundaries are desktop-only access and a 2D presentation.
Who it suits
It suits Counter-Strike 2 players who review match demos on a desktop browser. FACEIT users can use its extra voice, chat, and match-room features.
Plans and prices
Free
CS2 demo viewer · FACEIT browser extension
Read 8 Oct 2026 · demolens.org
On the record
- Analysis features
- Analysis tools include grenade lineup pins, movement trails, heatmap-style pins, FOV cones, drawing mode, and kill-feed badges.demolens.org · read 8 Oct 2026
- Browser requirements
- The viewer requires a desktop browser; the site names Chrome, Edge, and Firefox, and says phones are not supported.demolens.org · read 8 Oct 2026
- Demo limitation
- DemoLens provides a 2D tactical replay rather than a 3D first-person replay.demolens.org · read 8 Oct 2026
- FACEIT extension
- The browser extension adds a one-click demo button and player scouting statistics to FACEIT match rooms.demolens.org · read 8 Oct 2026
- Local processing
- Demo files are parsed in the browser using WebAssembly and are not uploaded to DemoLens.demolens.org · read 8 Oct 2026
- Privacy
- The privacy policy says DemoLens has no accounts, tracking, analytics cookies, or ads, and does not collect personal data.demolens.org · read 8 Oct 2026
- Project status
- DemoLens describes itself as an independently run, non-commercial community project and says it is not affiliated with FACEIT or Valve.demolens.org · read 8 Oct 2026
- Purpose
- DemoLens is a browser based 2D viewer for Counter-Strike 2 match demos.demolens.org · read 8 Oct 2026
- Replay features
- The replay includes a multi-level radar, grenade trajectories, player status, key presses, playback speed controls, and kill markers.demolens.org · read 8 Oct 2026
- Stats
- The viewer provides scoreboard and economy data, player performance metrics, percentile comparisons, and an integrity check against professional baselines.demolens.org · read 8 Oct 2026
- Support
- The site lists [email protected] as its contact address.demolens.org · read 8 Oct 2026
- Supported files
- The viewer accepts .dem, .dem.gz, and .dem.zst files.demolens.org · read 8 Oct 2026
- Translation privacy
- If built-in on-device translation is unavailable, using the translate button opens Google Translate and sends it the in-game chat text and player names.demolens.org · read 8 Oct 2026
- Voice and chat
- For FACEIT demos, DemoLens supports synchronized voice playback, per-player voice timelines with WAV export, and in-game chat translation.demolens.org · read 8 Oct 2026
