FreeHushBest Free Noise Cancellation Software for Desktop (2026)
The 20-second version: own a GeForce RTX card? Install NVIDIA Broadcast and stop reading. No RTX? Krisp Free's 30 free hours a month cover light meeting days on any hardware. Only care about streams and recordings? OBS's built-in filter and Audacity are unlimited and cost nothing. And before installing anything: the suppression already inside Zoom, Teams, Meet and Webex is free, unlimited, and better than its reputation.
1. NVIDIA Broadcast — unlimited, if you're invited
Free limit: none at all. Gate: GeForce RTX GPU (20-series+), Windows.
Nothing else on this list combines unmetered use with this level of filtering — noise removal, room echo removal, incoming-audio cleanup, all running on the GPU's AI hardware with no account and no counter. The asterisk is the invitation list: no RTX card, no Broadcast. If you're eligible, it wins on generosity and quality, which is why it tops a ranking built on exactly that product. Full review.
2. Krisp Free — 30 free hours a month, everywhere
Free limit: 60 noise-cancelled minutes daily (1.5× with a work email), one device at a time.
The universal option: any Windows or Mac machine, any meeting app, both audio directions. An hour a day is a real allowance — a stand-up plus a client call — and the midnight-GMT reset means it's dependable rather than a dwindling credit pot. It ranks below Broadcast only because its generosity is metered; on hardware without RTX it's simply first. Full review.
Heavy meeting load? The cap is the product.
Krisp's paid tier exists precisely for the person rationing free minutes across a three-call day. $8/month billed annually removes the counter — and the separate 7-day trial (no card) lets you check whether unlimited actually changes your day before paying.
Try Krisp unlimited free for 7 days Or read the free-vs-paid math →3. Your meeting app's own suppression — free and pre-installed
Free limit: none. Gate: per-app, and Google Meet's toggle is tier-dependent.
The entry most roundups skip because nobody profits from it: Zoom ships four suppression levels plus a voice-isolation mode, Teams has real ML suppression in the desktop client, Webex bundles three Smart Audio modes, and Meet's noise cancellation is solid where your account tier includes it. Against steady mechanical noise, tuned correctly, built-ins get most people all the way there — the honest baseline to try before installing anything from this list.
4. OBS noise suppression filter — for streams and recordings
Free limit: none. Gate: applies inside OBS only.
Two clicks deep in an app half the internet already has installed: an RNNoise-based filter that cleans your mic for streams and recordings, forever, free. It sits fourth only because of scope — it won't touch your Zoom call without virtual-cable plumbing. For content creation it's a quiet gem. Full review.
5. Audacity — the after-the-fact fixer
Free limit: none. Gate: recordings only, manual effort, steady noise only.
Not real-time and not automatic — but hand it a recording with constant hiss or hum and its profile-based reduction is surgical, unlimited and account-free. Every desk should have it installed even if it's used twice a year. Full review.
How to choose in one pass
- RTX + Windows: Broadcast. Done.
- Meetings on any other machine: tune your app's built-in first; add Krisp Free when the built-in's limits show.
- Streaming or recording content: OBS filter live, Audacity (or the online tools) for cleanup after.
- More than ~an hour of noisy calls daily: you're the person the paid tiers are for — the honest math.
Side by side
| Tool | Free allowance | Live calls? | Hardware / scope gate | Best for |
|---|---|---|---|---|
| NVIDIA Broadcast | Unlimited | Yes — any app | RTX GPU, Windows | Everything, if eligible |
| Krisp Free | 60–90 min/day | Yes — any app | 1 device at a time | Meetings on any hardware |
| Built-in suppression | Unlimited | Within its own app | Per-app; Meet is tier-gated | The free baseline |
| OBS filter | Unlimited | Not directly | Inside OBS only | Streams & recordings |
| Audacity | Unlimited | No — files after the fact | Steady noise only | Recording rescue |
Free noise cancelling software for Windows: the short version
Windows is the lucky platform — the most generous free tools only run there. The decision compresses to one hardware check: a GeForce RTX 2060 or newer means NVIDIA Broadcast, unlimited and free, and your search is over. GTX card? NVIDIA's legacy RTX Voice app (patched for GTX, downloaded only from NVIDIA's site) is the rougher-but-real fallback. No NVIDIA silicon at all: Krisp Free's 30 monthly hours works on any laptop, and OBS's built-in filter covers streams and recordings without touching the GPU. Every option here is $0 with the caps stated on its card.
And on a Mac?
Shorter list, still workable. Broadcast and OBS's NVIDIA method don't exist for you, so live-call cleanup is Krisp Free (full macOS support, same 30 monthly hours) plus whatever your meeting app ships — Zoom's noise removal levels work identically on Mac. For recordings, nothing changes: Audacity is native and unlimited, and Enhance's free hour lives in the browser, which has never cared what's under your keyboard.
Quick questions
Can I combine these tools?
Sensibly, yes — but never two live filters on the same stream. A working stack looks like: Broadcast or Krisp (or your app's built-in — pick one) for live calls, OBS's filter for streams, Audacity or a web tool for cleanup afterwards. Stacking two real-time suppressors processes the audio twice and adds artifacts.
Why isn't [big-name paid tool] on this list?
Because this list is free tiers only, and we don't count trials. Anything whose "free" expires — however good — belongs on the free-vs-paid page instead, where the price tag is stated in the first sentence.
What actually beats all five entries?
A £25 headset. Moving the mic from your laptop to centimetres from your mouth improves the voice-to-noise ratio more than any filter here — and it makes every one of these tools work better at the same time.