WhoopTool

Read your Betaflight blackbox in 60 seconds.

Drop a .bbl. Get a flight summary, spectral + step-response diagnostics, and a deterministic tune advisor. No install. Nothing leaves the browser.

Analyze a log → See a sample

/ FREE / CLIENT-SIDE / NO ACCOUNT

02 // WHAT YOU GET

Telemetry, unfolded.

Instant flight summary
Metadata, battery sag, motor health, RX quality — in one glance.
Spectral & step response
Noise bands and step response with PIDscope parity.
Deterministic tune advisor
Findings and actionable suggestions. Same input, same answer.
Side-by-side compare
Two logs, one diff. Config and diagnostics, aligned.
100% client-side
Your log never leaves the browser. No server upload, no tracking.
No account, no install
Open the URL, drop a log, read the truth. That is the whole flow.
03 // WHY

Why this tool exists

Other blackbox tools

  • ×Desktop-only, slow to start
  • ×Cluttered UI with features you never use
  • ×Paid plans or mandatory accounts
  • ×Logs uploaded to a server

WhoopTool Blackbox Analyzer

  • ✓Browser-based, loads in under a second
  • ✓One-screen summary, zero noise
  • ✓100% free, no account
  • ✓Client-side parsing — zero upload
04 // WHAT IT LOOKS LIKE

What it looks like

SPECTRAL · NOISE GYRO · ROLL · 0–500 Hz
GYRO · ROLL dB 0 240 Hz 500
Motor resonance and filter coverage — exposed, not guessed.
STEP · RESPONSE τ 18 ms · OS 8.2 %
STEP · ROLL τ=18ms · OS 8.2% peak
PIDscope-parity step response. Latency, overshoot, settle.
ADVISOR · FINDINGS DETERMINISTIC · 04/04
ADVISOR · DETERMINISTIC 04/04 ▲ FIL.002 D-term LPF slightly conservative ● PID.014 Roll/Pitch P balance within 6% ▲ RES.009 Motor 3 spike at 238 Hz (-23dB) ● RX.001 ELRS link stable, 0 lost frames
Deterministic advice. Same log, same findings, every time.
05 // FAQ

Frequently asked

How do I analyze a Betaflight blackbox log without desktop software?
Open the analyzer in your browser, load a .bbl file, and get a readable summary, spectral analysis, step response, and deterministic findings without installing desktop tools.
What file format do I upload?
.bbl Betaflight blackbox logs. Drop a file, or point at a sample to try it instantly.
Is my log uploaded to a server?
No. Parsing and analysis run entirely in your browser. Nothing is sent anywhere.
Does it work for Emuflight or INAV?
It is primarily targeted at Betaflight. Other firmware may partially parse but is not formally supported.
How big can the log be?
Limited by your device memory. Typical tinywhoop logs parse without issue in modern browsers.
Is the tune advisor opinionated?
It is deterministic — same input yields the same answer. Rules are documented and auditable.
Can I compare two logs side by side?
Yes. Upload a second log and every diagnostic renders with a side-by-side diff and a config diff.

Drop a log. Read the truth.

Paste a .bbl and get diagnostics in seconds. No install. No account.

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