Streaming Trailer Loudness Checker
QC a trailer or promo for OTT platforms: −24 LKFS ±2 full-mix loudness with true peak ≤ −2 dBTP and a short-form Max ST sanity check.
Trailers get the strictest scrutiny of any deliverable because loud promos are the #1 source of viewer complaints. The combination checked here (−24 integrated, −18 Max ST, −2 dBTP) mirrors what major OTT promo specs and broadcast ad rules enforce.
🔒 Everything runs in your browser via the Web Audio API — your audio is never uploaded.
QC a trailer or promo for OTT platforms: −24 LKFS ±2 full-mix loudness with true peak ≤ −2 dBTP and a short-form Max ST sanity check.
About Streaming Trailer Loudness Checker
QC a trailer or promo for OTT platforms: −24 LKFS ±2 full-mix loudness with true peak ≤ −2 dBTP and a short-form Max ST sanity check. Trailers get the strictest scrutiny of any deliverable because loud promos are the #1 source of viewer complaints. The combination checked here (−24 integrated, −18 Max ST, −2 dBTP) mirrors what major OTT promo specs and broadcast ad rules enforce.
How to use Streaming Trailer Loudness Checker
- 1Drag a file onto Streaming Trailer Loudness Checker, or click to choose one — it is analysed locally and never uploaded.
- 2Wait a moment while the tool processes the file entirely in your browser.
- 3Read the result, metrics and pass/fail verdict.
- 4Copy or export the report for your delivery, QC log or records.
Why use Streaming Trailer Loudness Checker?
- ✓Analyses your file entirely in your browser — it is never uploaded, so even confidential masters stay private.
- ✓Built on a published reference: ATSC A/85 (commercial loudness practice).
- ✓100% free with no sign-up, no watermark and no usage limits.
- ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.
Frequently asked questions
What does Streaming Trailer Loudness Checker do?+
QC a trailer or promo for OTT platforms: −24 LKFS ±2 full-mix loudness with true peak ≤ −2 dBTP and a short-form Max ST sanity check. Trailers get the strictest scrutiny of any deliverable because loud promos are the #1 source of viewer complaints.
Is my file uploaded to a server?+
No. Streaming Trailer Loudness Checker processes your file entirely in your browser using local JavaScript and the Web platform — your media never leaves your device, so it is safe for unreleased or confidential content.
What standard or source is Streaming Trailer Loudness Checker based on?+
It follows ATSC A/85 (commercial loudness practice); EBU R 128 s1 (short-form). Always confirm against the current official document, as specifications and rates can change.
Is Streaming Trailer Loudness Checker free to use?+
Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.
Related Broadcast tools
Shutter Angle Calculator
Convert shutter angle to shutter speed at any frame rate — the 180° rule and its exceptions, for cinema cameras that think in degrees.
● LiveFlicker-Free Shutter Calculator
Check whether your shutter speed will band under 50 Hz or 60 Hz mains lighting, and get the flicker-safe shutter speeds for your region.
● LiveCamera Battery Runtime Calculator
How long will a V-mount or NP-F battery power your rig? Watt-hours ÷ camera draw → runtime, plus how many batteries a shoot day needs.
● Live