Plot RF traces
Switch between S11, S21, S12 and S22 and compare values across frequency.
Free local RF tool
View Touchstone files without uploading them.
Open common .s1p and .s2p files, plot S11, S21, S12 or S22, overlay measurements and inspect worst-case values. Processing happens locally in your browser.
No account. No measurement upload.
Open the free viewerUse the included synthetic samples or choose files from your device.
What the free Touchstone viewer does
Compare three files
Overlay a golden unit and two measured units with clear names and colours.
Check a limit
Apply one minimum or maximum dB rule inside a defined frequency band.
How to inspect an S1P or S2P file
1 · Choose files
Drop up to three local S1P or S2P measurements into the viewer.
2 · Select a trace
Choose the S-parameter and frequency-bounded requirement you need to review.
3 · Review results
Inspect the overlay, extrema, worst frequency and pass/fail result, then print a PDF.
Supported Touchstone data
BenchReport reads common Touchstone 1.0-style S1P and S2P files using DB/angle, magnitude/angle, or real/imaginary data. Frequency units can be Hz, kHz, MHz, or GHz. See the complete format and limitation list before relying on a result.
Your measurement contents stay local.
The selected files are parsed in the browser and are not sent to BenchReport or Cloudflare. Anonymous site-level analytics do not contain measurement data.
Need repeatable acceptance reports?
The free viewer is intended for quick inspection. BenchReport Pro adds unlimited measurements and rules, reusable templates, portable projects, company branding and an offline Windows application.
Touchstone viewer questions
Are my S-parameter files uploaded?
No. Parsing, plotting and acceptance calculations run locally in the browser.
Does it support both S1P and S2P?
Yes. S1P files provide S11; S2P files can provide S11, S21, S12 and S22.
Can I compare several measurements?
Yes. BenchReport Free overlays up to three measurements and lets you mark one as the golden reference.
Is BenchReport a replacement for a VNA?
No. It analyses existing Touchstone data and produces documentation; it is not a calibrated instrument or approved test process.