Validate, Inspect & Debug VAST Video Ad Tags Instantly
VAST Tag Tester is a free online tool for validating video ad tags against the IAB VAST 2.0–4.3 specification. Paste a VAST URL or raw XML, and it instantly parses the response, resolves wrapper chains up to 5 hops deep, and surfaces errors and warnings (e.g. error 100 XML parse failure, 303 wrapper limit exceeded) before they hurt ad delivery. It also audits all tracking pixels (impression, click, and quartile events) with vendor detection and live HTTP status checks, and analyzes MediaFile elements for codec, bitrate, resolution, and MIME type. No account or sign-up required — built for ad ops teams, publishers, agencies, and programmatic advertising engineers who need to catch ad errors before they reach real viewers.
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4.8
6 ratings
AI video with native sound, paid per clip. Nothing stored.
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Comments
8Indie hacker, building http://gencoloring.ai and https://morse-coder.com
No account or sign-up required is really cool.
Indie hacking since 12
Will definitely use this tool to validate my videos
Work Solo, Never Alone
This VAST Tag Tester looks like a lifesaver for ad ops teams! Resolving wrapper chains up to 5 hops deep and catching tracking errors before launch is huge. Plus, no sign-up required? Huge win for programmatic engineers needing quick, reliable ad audits.
I am a dedicated Full-Stack Developer specializing in creating responsive, scalable, and high-performance web applications.
This VAST Tag Tester looks like a lifesaver
Data science
VAST Tag Tester has great potential and offers some useful features, but I encountered a few issues that could be improved. Please contact me so I can share detailed feedback and suggest the changes I'd like to see. Email: [email protected]
Very promising, keep it up!
The wrapper-chain debugging is the most useful part here—VAST errors can be surprisingly painful to trace across vendors. An exportable report for sharing with partners would make this even better.
不错还可以。 还有什么需要说的嘛。 要是