The current version of iPerf3 is 3.22 (as of 30/09/2026). patchletter checks the official source daily and emails you new releases.
iPerf3 at a glance
iperf3 is a widely used open-source tool for measuring network throughput between two hosts — a staple for diagnosing bandwidth and network performance. It ships releases in an unhurried cadence plus occasional fixes; it's a diagnostic tool run on demand.
For admins iperf3 is simple and low-risk, but note one thing: running it in server mode opens a listening port that anyone reaching it can use to generate traffic, so don't leave an iperf3 server running exposed on the internet — start it only when testing, bind it appropriately, and stop it after. Keep it reasonably current for fixes (there have been occasional advisories in the server code). It comes from the distribution on Linux and official builds elsewhere. The results depend on test conditions — interpret them with care. Its value is purely diagnostic. Patchletter surfaces new iperf3 releases so fixes land.
Version history & changelog · as detected by patchletter
| Version | Channel | Date | Notes |
|---|---|---|---|
| 3.22 | STABLE | 30/09/2026 | – |
| 3.21 | STABLE | 08/07/2026 | – |
Frequently asked questions
- What is the latest version of iPerf3?
- iPerf3 3.22, released 30/09/2026. patchletter checks the vendor's official source daily for new releases.
- Where can I find the iPerf3 release notes?
- The version history above links to the vendor's official release notes where the vendor publishes them. patchletter deliberately stores no vendor full texts.
- How do I get notified about new iPerf3 updates?
- Tick iPerf3 off in the catalogue and leave your address. From then on new versions go out by email — one at a time, or bundled in the daily or weekly digest.
An email as soon as a new iPerf3 version ships
We reconcile the vendor source daily. When a new version appears, it lands in your inbox right away or bundled as a digest. The update email is free and ends with one click. Alerts about vulnerabilities and end of support are part of patchletter Pro.
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[](https://patchletter.com/en/software/iperf3)https://patchletter.com/badge/iperf3.svgAlso available: ?v=eol (end of support) and ?v=cve (actively exploited).
