Explore the radio spectrum from your browser.
BrowserSDR turns a supported USB radio into a browser workspace for listening, discovering signals and decoding broadcasts and data. Connect your receiver, tune a signal, and see what's happening across the spectrum—without installing a desktop SDR application.
Open BrowserSDR · Getting started · Receiver compatibility
FM reception with live signal activity and decoded station information.
- Listen to radio. Tune FM broadcasts with RDS station information, AM, narrowband FM, single sideband and Morse audio. Digital radio reception includes DAB+.
- Explore the spectrum. Watch signals appear in the live spectrum and waterfall, click to tune, consult band guides, and use Explorer for scans and field surveys. Save useful frequencies as favorites.
- Decode more than audio. Explore aircraft positions, ship messages, weather-balloon telemetry, selected wireless sensors, pager messages, amateur text and radio images. Supported modes include ADS-B, AIS, APRS, POCSAG (512/1200/2400 bit/s), RTTY, NAVTEX, WEFAX and SSTV, with maps or dedicated results views where applicable.
- Record and revisit. Save short audio clips as WAV, rewind recent audio, or record radio samples (I/Q) to replay and investigate later. Export compatible captures as SigMF for use with other radio tools.
Reception depends on your receiver, antenna, location and signal conditions. Decoder availability and real-world validation vary by mode; some newer decoders still await off-air verification.
You'll need desktop Google Chrome, a supported USB SDR and an antenna suited to the band you want to receive.
- Connect your receiver and open BrowserSDR.
- Select your receiver in Signal source, connect, and choose it in Chrome's USB dialog.
- Choose a mode and frequency, then start receiving. For a first listen, try WBFM on a strong local FM station.
RTL-SDR and HackRF Pro are the stable desktop receivers. HackRF One is experimental; bladeRF and USRP profiles are available with additional validation limits. Other browsers and receiver/mode combinations need their own checks. See compatibility and setup for details, including USB permissions and driver requirements.
RTL-SDR also offers 3.2 MS/s (experimental) in Device details & settings. It provides a wider spectrum window and native I/Q captures, but some dongles or USB hosts lose samples at this rate. Select 2.4 MS/s if audio or decoding breaks up. Existing defaults are unchanged; ordinary RTL I/Q cannot prove loss-free reception.
Browse the wiki, read what's changed, or follow the development guide. Found a problem? Open an issue with your receiver, browser and steps to reproduce it. You can also share results through Compatibility & tests in the app's help menu.
BrowserSDR is receive-only. Licensed under PolyForm Perimeter 1.0.1; bundled components retain their own licenses. See third-party notices.
Shared RF frequency Search uses the reviewed public SigIntAtlas catalog without an account. Automatic checks the live catalog and falls back to a dated saved copy when unavailable; Live shows only current live results; Saved searches the saved public copy without a catalog request. Revision, publication and last-live-check times make the source visible. Saved copies can include subsequently changed or withdrawn profiles. Station search keeps its existing live reference checks, and Preview/Apply remains deliberate.
The bundled public snapshot is generated from Atlas's public export with
node scripts/update-frequency-snapshot.mjs ATLAS-EXPORT.json; edit/review the catalog in
Atlas, then regenerate this delivery copy rather than maintaining a second catalog here.