RC Log Viewer — replay EdgeTX & iNAV / Betaflight flight logs in 3D

Free and open-source. Runs entirely in your browser — your logs never leave your machine.

How it works

1. Open a log. Drop an EdgeTX CSV from your radio's SD card, or an iNAV / Betaflight blackbox file — or try a built-in sample flight.
2. Watch the replay. Your whole flight is rebuilt on a 3D satellite globe with a chase camera, a live telemetry bar (battery per-cell voltage, altitude, speed, heading, attitude and stick inputs), and playback controls.
3. Analyze it. Scrub the timeline, jump between takeoff / RTH / landing events, set bookmarks, and read synced charts for attitude, altitude, speed, battery and signal.

Supported log formats

Source	Format	Typical file
EdgeTX / OpenTX radios	SD-card telemetry logs (CSV)	Model-2026-04-26.csv
iNAV flight controllers	Blackbox logs	.bbl, .bfl, .txt
Betaflight flight controllers	Blackbox logs	.bbl, .bfl, .txt

Private by design

Logs are parsed in your browser with WebAssembly. Nothing is uploaded, there are no accounts, and the viewer works offline once installed as an app. GPS traces of your flying spots stay on your machine.

Guides for your firmware

• iNAV blackbox viewer — replay iNAV logs with GPS on a 3D globe.
• Betaflight blackbox viewer — read RC-input, attitude and battery charts in the browser.
• EdgeTX log viewer — open SD-card telemetry CSV logs from your radio.
• How to open a .bbl file — what blackbox files are and how to view them online.
• All guides — enabling logging on EdgeTX, Betaflight and iNAV, reading a log, and analyzing a crash.

Frequently asked questions

Is my flight log uploaded anywhere?

No. Parsing and 3D replay run entirely client-side. The only network traffic is fetching map imagery tiles.

How do I get logs off my radio?

Enable SD-card logging on your EdgeTX/OpenTX radio (a Special Function on a switch), fly, then copy the CSV from the /LOGS folder of the SD card.

Which firmware versions are supported?

EdgeTX and OpenTX CSV logs; iNAV blackbox up to 8.x and Betaflight blackbox up to 4.5.x (two independent parsers — most real-world files open fine).

My log has no GPS — is it still useful?

Yes. Without GPS you still get the telemetry bar and all synced charts (attitude, altitude, battery, signal); the 3D globe needs coordinates.

Does it work offline?

Yes — it's an installable PWA. After the first visit the viewer loads without a connection.

Is there a desktop app?

Yes, free Electron builds for Windows, macOS and Linux are on the GitHub releases page.

Watch a sample flight · Source on GitHub (GPL-3.0) · Video demo · Part of narenana — free browser tools for RC pilots, alongside the Nanawing FPV wing simulator.