Best Free Noise Cancellation Software for Desktop (2026)
The 20-second version: own a GeForce RTX card? Install NVIDIA Broadcast and stop reading. No RTX? The suppression already inside Zoom, Teams and Discord is free, unmetered and better than its reputation — tune it before installing anything. Only care about streams and recordings? OBS's built-in filter and Audacity are unlimited and cost nothing. And Krisp? It left this list: no free plan any more, just a 7-day trial before the paid plans.
None of the four free entries has a counter. Krisp, the one paid tool on this page, is not on the scale: after a 7-day trial it is a subscription, not an allowance. Scale: 0 to 30 hours a month.
Every free entry on this page has no paid tier to quote.
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. Your meeting app's own suppression — free and pre-installed
Free limit: none. Gate: works only inside its own app, and Google Meet's computer version is plan-gated.
The entry most roundups skip because nobody profits from it. Zoom applies noise suppression by default, with Auto, Low, Medium and High levels plus a personalized audio isolation mode that uses your voiceprint. Teams keeps noise suppression switched on by default in its desktop and mobile apps. Discord runs Krisp's model inside its own voice settings and says plainly that it's free when used with Discord. Google Meet is the exception: its cloud noise cancellation comes with Google Workspace editions (Business, Enterprise, Frontline, Education, Workspace Individual) and Google One plans of 2 TB or more — a plain free Google account isn't on that list — though a device-based version works for everyone on most Android phones. Each of those was read on the vendor's own help page on October 8, 2026. Against steady mechanical noise, tuned correctly, built-ins get most people all the way there — the honest baseline to try before installing anything else.
3. 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 third 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.
4. 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.
Off the list: Krisp — a 7-day trial, then paid
Free limit: 7 days. After that: Core $8 a month billed annually ($16 month to month), or Advanced $15 ($30).
Krisp used to rank second here on the strength of its free plan. That plan no longer exists: Krisp's pricing page now lists a 7-day free trial with all premium features and no credit card, and its terms say access stops when the trial ends unless you've bought a plan. It's still the tool to try when you want one filter for every app, in both directions, on any hardware — but it's a paid tool, so it sits outside a ranking of free ones. Prices and trial details.
Want one filter for every app? Test it for a week.
Krisp's 7-day trial needs no card. Run it against your tuned built-in suppression on the same calls; if nobody hears the difference, stay on the free baseline. If they do, Core is $8 a month billed annually.
Try Krisp free for 7 days Or read the free-vs-paid math →How to choose in one pass
- RTX + Windows: Broadcast. Done.
- Meetings on any other machine: tune your app's built-in first; if you need one filter across every app, Krisp's 7-day trial tells you whether its paid plan is worth it.
- 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 |
| Built-in suppression | Unlimited | Within its own app | Per-app; Meet is plan-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 |
| Krisp (not free) | 7-day trial only | Yes — any app | Paid plan after the trial | One filter, every app |
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: the suppression inside Zoom, Teams and Discord works on any laptop, and OBS's built-in filter covers streams and recordings without touching the GPU. Every free option here is $0 with its limits stated; Krisp is the paid exception, after a 7-day trial.
And on a Mac?
Shorter list, still workable. Broadcast and OBS's NVIDIA method don't exist for you, so free live-call cleanup is whatever your meeting app ships: Zoom's noise removal levels and Teams' toggle both work on Mac, and Discord's built-in Krisp filter runs on Apple-silicon Macs with macOS 12 or later. Krisp's own Mac app is the paid step up, after its 7-day trial. 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 your app's built-in (or Krisp, if you pay for it — 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. That's why Krisp moved off this list in October 2026: its free plan ended, and a 7-day trial doesn't count.
What actually beats all four entries?
A budget 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.