Open and inspect PX4 ULog flight logs (.ulg and .ulog) directly in VS Code.
The extension replaces the binary file view with an interactive log viewer for
quick flight-data inspection.
Getting started
Install PX4 ULog Viewer from the VS Code Marketplace.
Open a folder containing a .ulg or .ulog log file.
Open the log file from the Explorer, or select the ULog Viewer icon in
the Activity Bar and choose a file from the list.
You can also run ULog Viewer: Open ULog File from the Command Palette to
open a log from anywhere on disk.
Explore a flight log
The viewer provides the following sections:
Plots — browse logged topics and select numeric fields to chart them.
Add plot panels to compare signals; their time axes stay synchronized.
Drag to zoom, double-click a chart, or select Reset zoom to restore the
full time range.
Info — review log metadata, duration, software and hardware versions,
and information entries recorded by the vehicle.
Parameters — search logged parameters and inspect any values that
changed during flight, including their timestamped history.
Messages — view the onboard log console, including PX4_INFO,
PX4_WARN, and PX4_ERR messages.
Supported files
PX4 ULog files with .ulg and .ulog extensions are supported. Logs remain
on your machine; the extension reads them locally in VS Code.
License
Copyright 2026 Anil Kircaliali. All rights reserved.
