HTML5 ad runtime troubleshooting
HTML5 ad is blank after upload? Static validation is not enough
A creative can have valid files and still render blank when its JavaScript executes in the ad environment. Deep Audit runs the creative in a local browser to expose runtime failures before upload.
The short version
The ZIP passes a markup or packaging check, but the platform preview or live placement shows a blank, partially rendered, or broken ad.
What Ad-Preflight checks
- ✓Runtime JavaScript errors with file and line information
- ✓Failed asset requests and insecure network calls
- ✓Blank-render detection at each creative size
- ✓Overflow, animation, redirect, popup, and visual behavior signals
What it cannot guarantee
- !A local browser run cannot reproduce every platform sandbox or publisher wrapper
- !External services may behave differently at serving time
- !A passing runtime report is evidence of readiness, not a platform approval guarantee
Run it in the desktop app or CLI
Designers and AdOps can drop a campaign folder into the desktop app and follow the visual report. If you work in a terminal or CI pipeline, the same checks are available through the CLI.
- 1.Run the standard audit first to remove packaging and markup failures.
- 2.Activate Deep Audit and run the creative in a real local browser.
- 3.Open the report and fix the first runtime error before chasing downstream symptoms.
- 4.Re-run all sizes and attach the report to the handoff.
CLI equivalent
npx @ad-preflight/cli package ./my-ad --fix