Video QC Checker
Pre-upload health scan for your video: black frames, frozen frames, dead audio, clipping and delivery specs — free report card, private.
100% private — your video never leaves your deviceScan your video
Sampling-based scan (about 2 frames per second plus full audio analysis) — catches the common killers, not every single frame. Enterprise QC suites analyze exhaustively; this is your free pre-flight check.
Scanning…
QC report card
Findings
How it works
Drop in your video
Any MP4 or WebM your browser can play. Pick the platform you're delivering to — YouTube 1080p/4K, Instagram Reel or TikTok — and hit “Run QC scan”.
Frames and audio are sampled
The scanner seeks through the video sampling about 2 frames per second, measuring brightness and frame-to-frame change, then decodes the audio track for silence, clipping and loudness.
Get the report card
A score, key stats, and a findings list with exact timestamps — black frames, frozen sections, dead air, clipped audio, spec mismatches. Download the CSV for your records.
What video QC actually checks (and why creators skip it)
In broadcast, quality control is a gate: nothing airs until software has verified the file against the delivery spec — correct resolution and frame rate, no frozen or black frames, audio present, loudness within limits, no clipping. The enterprise tools that do this cost thousands a year because they analyze every frame on dedicated hardware. Independent creators skip QC entirely, and that's exactly why glitchy uploads happen: a render that froze for two seconds, an export where the audio track went missing, a file uploaded in the wrong orientation.
The defects this scanner hunts are the ones that actually reach viewers. Black frames usually come from gaps between clips on the timeline or a failed render segment; frozen frames come from encoder stalls, dropped frames in screen recordings, or a still image accidentally stretched across seconds of timeline. Dead air — long silent stretches — is the silent killer of retention: viewers assume the video broke and leave. Clipped audio, where the waveform slams into digital maximum, sounds harsh and cheap even on phone speakers, and it's unfixable after export.
Run the scan before you upload, not after. Fix what it flags — trim the frozen section, re-export the silent stretch, re-render the black gap — and keep the CSV as a paper trail if you deliver to clients. This scan samples rather than checking every frame, so treat a clean report as strong confidence rather than a broadcast certificate, and treat any red finding as worth the two minutes it takes to verify the timestamp yourself.
How the Checks Work
The checker samples frames as your video plays in the browser: pure-black frames are flagged, consecutive identical frames suggest a freeze, and the audio track is analyzed for digital silence and clipping (samples hitting 0 dBFS). Delivery specs — resolution, frame rate, duration — are read from the container. You get a report card, not a verdict: a black frame might be an intentional fade.
Limitations
This is a pre-upload sanity scan, not broadcast QC. It cannot judge color accuracy, compression artifacts, or loudness standards like LUFS targets — those need professional tools. Analysis runs at playback speed, so a two-hour file takes a while; trim to the section you care about first.
Quality control catches what went wrong; logging catches what went right. The Stream Highlight Logger timestamps the moments worth keeping while a stream runs.
Frequently asked questions
Related Tools
Passport Photo Maker — Free ID Photos & Print
Make compliant passport & ID photos at home: country size presets, head-size guides, 4×6 print sheet. Free — no $9…
Beat Tag Dropper
Drop your producer tag over any beat automatically: set the interval, fades and ducking, preview the protected beat…
Dialogue Analyzer
Paste a story chapter for a free dialogue report: dialogue-vs-narration ratio, speech-tag census, adverb check and…
Photo Mosaic Maker
Build a photo mosaic in your browser: one master photo plus up to 60 tile photos, matched by color. Free hi-res PNG…
Voice-Over Ducking Mixer
Duck background music under your voice-over in the browser: adjustable depth, attack and release, live preview, MP3 and…
Audio Speed Changer — Faster or Slower Audio
Speed up or slow down any audio file free in your browser: preview at 0.5x–2.0x, then download as WAV. No signup —…