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Gqrx is an open source software defined radio (SDR) receiver implemented using GNU Radio and the Qt GUI toolkit. Currently it works on Linux and Mac with hardware supported by gr-osmosdr, including Funcube Dongle, RTL-SDR, Airspy, HackRF, BladeRF, RFSpace, USRP and SoapySDR.

Gqrx can operate as an AM/FM/SSB receiver with audio output or as an FFT-only instrument. There are also various hooks for interacting with external application using nertwork sockets.


Gqrx is distributed as source code package and binaries for Linux and Mac. Alternate Mac support is available through macports and homebrew.

Please see for a list of download resources.


It is strongly recommended to run the "volk_profile" gnuradio utility before running gqrx. This will detect and enable processor specific optimisations and will in many cases give a significant performance boost.

The first time you start gqrx it will open a device configuration dialog. Supported devices that are connected to the computer are discovered automatically and you can select any of them in the drop-down list.

If you don't see your device listed in the drop-down list it could be because:

  • The driver has not been included in a binary distribution
  • The udev rule has not been properly configured
  • Linux kernel driver is blocking access to the device

You can test your device using device specific tools, such as rtl_test, airspy_rx, hackrf_transfer, qthid, etc.

Gqrx supports multiple configurations and sessions if you have several devices or if you want to use the same device under different configurations. You can load a configuration from the GUI or using the -c command line argument. See "gqrx --help" for a complete list of command line arguments.

Tutorials and howtos are being written and published on the website

Known problems

See the bug tracker on Github:

Getting help and reporting bugs

There is a Google group for discussing anything related to Gqrx:!forum/gqrx This includes getting help with installation and troubleshooting. Please remember to provide detailed description of your problem, your setup, what steps you followed, etc.

Please stick around and help others with their problems. Otherwise, if only developers provide user support there will be no more time for further development.

Installation from source

Gqrx can be compiled using qmake or cmake.

The source code is hosted on Github:

To compile gqrx from source you need the following dependencies:

To build using qmake, you can either open the file in Qt Creator and build, or on the command line:

$ git clone gqrx.git
$ cd gqrx.git
$ mkdir build
$ cd build
$ qmake ..
$ make

Using cmake, gqrx can be compiled from within Qt Creator or in a terminal:

For command line builds:

$ git clone gqrx.git
$ cd gqrx.git
$ mkdir build
$ cd build
$ cmake ..
$ make

On some systems, the default cmake release builds are "over optimized" and perform poorly. In that case try forcing -O2 using

export CXXFLAGS=-O2

before the cmake step.

For Qt Creator builds:

$ git clone gqrx.git
$ cd gqrx.git
$ mkdir build
Start Qt Creator
Open gqrx.git/CMakeLists.txt file
At the dialog asking for build location, select gqrx.git/build
click continue
If asked to choose cmake executable, do so
click continue
click the run cmake button
click done
optionally, on the Projects page, under Build Steps/Make/Additional arguments,
	enter -j4 (replacing 4 with the number of cores in your CPU).
Use Qt Creator as before

Credits and License

Gqrx is designed and written by Alexandru Csete OZ9AEC, and it is licensed under the GNU General Public License.

Some of the source files were adopted from Cutesdr by Moe Weatley and these come with a Simplified BSD license.

Following people and organisations have contributed to gqrx:

Alex Grinkov Alexander Fasching Andy Sloane Andrea Merello Andrea Montefusco IW0HDV Anthony Willard Bastian Bloessl Pavel Stano Chris Kuethe Christian Lindner DL2VCL charlylima Darin Franklin Stefano Leucci Daniil Cherednik Dominic Chen Elias Önal Frank Brickle, AB2KT Bob McGwier, N4HY Göran Weinholt, SA6CJK Grigory Shipunov Jiří Pinkava Jeff Long Josh Blum Kate Adams Kitware Inc. Michael Dickens Michael Lass Michael Tatarinov Moe Weatley Nadeem Hasan Nokia Phil Vachon Rob Frohne Stefano Leucci Timothy Reaves Valentin Ochs Vesa Solonen Vincent Pelletier Will Scales Wolfgang Fritz DK7OB Youssef Touil

Some of the icons are from:

  • The GNOME icon theme CC-SA 3.0 by GNOME icon artists
  • Tango icon theme, Public Domain by The people from the Tango! project
  • Mint-X icon theme, GPL by Clement Lefebvre

Also thanks to Volker Schroer and Alexey Bazhin for bringing Funcube Dongle Pro+ support to GNU Radio and Gqrx.

Let me know if somebody is missing from the list.



Software defined radio receiver powered by GNU Radio and Qt.



GPL-3.0, Apache-2.0 licenses found

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  • C++ 93.6%
  • C 4.2%
  • CMake 1.5%
  • QMake 0.7%