Log viewer for EdgeTX, iNAV and Betaflight flight logs

Replay any flight, right in your browser. Free and open source, and your logs never leave your machine.

How it works

Open a log. Drop an EdgeTX CSV from your radio's SD card or an iNAV or Betaflight blackbox file, or try a built-in sample flight.
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.
Analyse it. Scrub the timeline, jump between takeoff, RTH and landing events, set bookmarks, and read synced charts for attitude, altitude, speed, battery and signal.

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

EdgeTX log viewer: open SD-card telemetry CSV logs from your radio, including ELRS telemetry.
iNAV log viewer: replay iNAV blackbox logs with GPS on a 3D globe.
Betaflight blackbox viewer: GPS replay and crash review for Betaflight logs.
Open a .bbl file: what blackbox files are and how to view them in your browser.
All guides: enabling logging on EdgeTX, Betaflight and iNAV, reading a log, and analysing a crash.

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.

Supported log formats

Source	Format	Typical file
EdgeTX / OpenTX radios	SD-card telemetry logs (CSV), including ELRS telemetry	`Model-2026-04-26.csv`
iNAV flight controllers	Blackbox logs, iNAV 9.x and earlier	`.bbl`, `.bfl`, `.txt`
Betaflight flight controllers	Blackbox logs, Betaflight 4.5.x and earlier	`.bbl`, `.bfl`, `.txt`

Frequently asked questions

Is my flight log uploaded anywhere?: No. Parsing and the 3D replay run in your browser, and the log itself is never sent. The viewer does fetch map imagery, and it sends anonymous usage and error reports.
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 9.x and earlier, tested on real iNAV 9.0.0 and 9.0.1 logs. Betaflight blackbox up to 4.5.x; logs from Betaflight 2025.12 and later are not tested yet and may not open. If the main parser rejects a blackbox file, a second, independent parser tries it, so most real-world logs open.
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.

RC Log Viewer needs JavaScript (and WebGL) to parse logs and render the 3D replay. Everything above describes what it does; enable JavaScript to use it.