# gqrx-sdr/gqrx

Software defined radio receiver powered by GNU Radio and Qt.

Repository: https://github.com/gqrx-sdr/gqrx
Canonical: https://ross.abutalabs.com/products/gqrx
Homepage: http://gqrx.dk
Language: C++
License: GPL-3.0
License Family: copyleft
Topics: gqrx, airspy, rtl-sdr, rfspace, receiver, funcube-dongle, fft, sdr, qt, hackrf, gnuradio, hacktoberfest
Last push: 2026-08-06T20:55:38+00:00

## Health v2 (maintenance only)
Score: 69/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 96, release rhythm 16, longevity 100
- inputs: {"age_days": 5788, "days_push": 27, "days_rel": 463, "gap_med": 178, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3662, forks 584 (observed 2026-08-28T04:08:13.314930+00:00)

## What it is
Gqrx is an open source software defined radio (SDR) receiver built on GNU Radio and the Qt GUI toolkit. It supports a wide range of SDR hardware (RTL-SDR, Airspy, HackRF, Funcube Dongle, BladeRF, USRP, SoapySDR) and can operate as an AM/FM/SSB receiver or an FFT-only spectrum analyzer.

## Use cases
- listen to AM/FM/SSB radio with an RTL-SDR dongle
- view an FFT spectrum plot and waterfall from an SDR device
- record and replay raw baseband I/Q data
- stream received audio over UDP to external decoders
- remotely control an SDR receiver over TCP
- decode NOAA APT weather satellite images
- use a HackRF or Airspy as a spectrum analyzer

## When to choose
- you want a ready-to-use GUI receiver for common SDR hardware on Linux or Mac
- you need demodulation modes like AM, SSB, CW, FM-N, FM-W with AGC and squelch
- you want network hooks (TCP remote control, UDP audio streaming) for integration with other tools

## When to avoid
- you need a headless or scriptable-only SDR processing pipeline
- you require Windows as a first-class supported platform (only available via radioconda)
- you want to build custom signal-processing flows rather than use a fixed receiver application

## Facets
- artifact type: application
- maturity: active
- function: audio-processing, gui, developer-tools
- domain: hardware, cross-platform
- platform: windows, cpp
- tags: sdr, software-defined-radio, rtl-sdr, hackrf, airspy, gnuradio, spectrum-analyzer, fft, waterfall, radio-receiver, qt, demodulation, iq-processing, real-time, linux, macos, desktop

## Member repositories
- gqrx-sdr/gqrx (main) score 69

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:13.314930+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:31:34.791056+00:00, confidence not recorded.
  - readme: https://github.com/gqrx-sdr/gqrx (fetched 2026-08-28T04:08:13.314930+00:00, sha 5482e9a7043e)
  - homepage: http://gqrx.dk (fetched 2026-08-29T09:25:43.548679+00:00, sha 8a0be58f17d6)
  - site_page: https://www.gqrx.dk/category/doc (fetched 2026-08-29T09:25:43.557388+00:00, sha 018dbd0ae05a)
- Data as of 2026-08-30T08:39:29.467469+00:00.