Analyze Loudness
Measure a clip's integrated loudness (LUFS), loudness range, and true peak (EBU R128). Returns a JSON report.
About Analyze Loudness
Analyze Loudness measures a clip's integrated loudness (LUFS), loudness range, and true peak against the EBU R128 standard, returning a clean JSON report. Use it to check whether audio or video meets a delivery spec before you publish or hand it off. The measurement runs in your browser, so the file is never uploaded.
- Category
- media
- Input
- Accepts: audio/* or video/*.
- Output
- Outputs: application/json.
- Cost
- Free, runs in your browser
- Memory
- high
- Install group
- ffmpeg
Common uses
- Verify a podcast episode sits near -16 LUFS before submitting to a host
- Check a video's true peak isn't clipping above a platform's ceiling
- Compare the loudness range of two mixes to see which is more dynamic
- Quality-check a batch of deliverables against a broadcast spec
- Diagnose why one clip sounds noticeably louder than the rest of an edit
Frequently asked questions
What does the report include?
Integrated loudness in LUFS, the loudness range, and the true peak — the three core EBU R128 measurements — returned as JSON.
What's the difference between LUFS and true peak?
LUFS measures perceived loudness over the whole clip; true peak measures the highest instantaneous sample level, which is what matters for avoiding distortion on playback.
Can I analyze a video file, not just audio?
Yes — it accepts both audio/* and video/* and measures the audio track of either.
Does it change my file?
No. This is a read-only measurement; it produces a JSON report and leaves your source untouched.
Is the file sent to a server?
No. Analysis happens entirely in your browser; the clip stays on your device.
Keywords
- loudness
- analyze
- measure
- lufs
- true peak
- ebu
- r128
- audio
- meter