Enter Your Tag Here
No Creative Loaded
Paste your ad tag above and click Render Preview to see the sandbox output.
Validation Insights
Undetectable
Ensure ad contains sizing script
Redirect target for user clicks
0
Impression and event tracking pixels
0 Scripts | 0 Iframes
Detected embedded structure elements
Free Ad Tag Tester and Validator
Test ad tags online before they go live. Preview and validate HTML5, JavaScript, VAST, VMAP and MRAID ad creatives in your browser. Check tracking pixels, clickthrough URLs, scripts, creative dimensions and errors before deploying a campaign.
What is AdTagTester?
AdTagTester is a simple online tool for testing and debugging advertising tags before they are used in production.
Paste your ad tag, load the creative and see what happens. You can use it to preview HTML5 ads, test VAST responses, inspect tracking calls, check clickthrough URLs and investigate problems with ad creatives.
It is useful for ad operations teams, publishers, developers, media buyers and anyone who needs to check an ad before it goes live.
What can you test?
HTML5 Ad Tester
Test HTML5 and JavaScript ad creatives directly in your browser. Preview rich media banners, check creative dimensions, inspect scripts and investigate JavaScript errors before sending the creative into production.
VAST Tester
Test VAST ad tags by loading a VAST URL or VAST XML response. Preview video ads and inspect the information returned by the ad server, including tracking events, media files and clickthrough information.
VMAP Tester
Test VMAP responses and inspect how video ad breaks are configured. This can be useful when working with pre roll, mid roll and post roll advertising.
MRAID Tester
Test MRAID based mobile advertising creatives and investigate issues with the creative or its JavaScript implementation before deployment.
Ad Tag Validator
Use AdTagTester to inspect advertising tags and identify information that may help explain why a creative is not behaving as expected. Check the tag response, scripts, tracking information and other elements loaded by the creative.
VAST Tag Testing
VAST tags can fail for many different reasons. The ad response may be invalid, the media file may not load, tracking events may be missing, or the clickthrough URL may not behave as expected.
AdTagTester lets you load a VAST tag and inspect the response in one place. It is useful when troubleshooting video advertising campaigns, checking tags before launch or trying to understand why a VAST creative is not playing correctly. Try the VAST tester directly.
How to test an ad tag
Testing an ad tag is straightforward.
- Enter your ad tag
Paste your ad tag, VAST URL, VAST XML or supported creative code into the tester. - Run the test
Load the creative and let the tester render the ad. - Check the result
Look at the preview and inspect the information returned by the creative. - Investigate problems
Check tracking URLs, clickthrough information, scripts, iframes, console errors and other available details. - Test again
Make your changes and run the tag again before deploying it.
Who uses AdTagTester?
Ad Operations Teams
Use the tester to check advertising tags before campaigns are launched.
Publishers
Verify creatives and ad tags before they are served on your website or app.
Developers
Debug HTML5, JavaScript and rich media advertising creatives.
Programmatic Teams
Inspect ad responses and troubleshoot problems with advertising tags.
Media Buyers
Preview creatives and check that the ad behaves as expected before launch.
Ad Tech Teams
Investigate tracking, creative loading and implementation problems.
Frequently Asked Questions
What is an ad tag tester?
An ad tag tester is a tool that lets you load and inspect an advertising tag before it is deployed. It can help you preview the creative and identify issues with tracking, scripts, clickthrough URLs and other parts of the ad.
How do I test a VAST tag?
Paste the VAST URL or VAST XML into the VAST testing tool and run the test. You can then inspect the video ad response and available tracking information.
Can I test VAST XML?
Yes. You can load VAST XML and inspect the response to help identify problems with the video ad configuration.
Can I test HTML5 ads?
Yes. AdTagTester can be used to preview HTML5 and JavaScript based advertising creatives and investigate issues with the creative.
What is the difference between an ad tag tester and an ad tag validator?
A tester is mainly used to load and preview an advertising tag, while a validator focuses more on checking the tag and identifying potential configuration or structural problems.
Can I check tracking pixels?
The tester can help you inspect tracking information loaded by the creative, making it easier to investigate whether tracking events are being triggered as expected.
Can I check clickthrough URLs?
Yes. When clickthrough information is available in the loaded creative, the tester can help you inspect it.
Who is AdTagTester for?
AdTagTester is useful for publishers, ad operations teams, developers, programmatic advertising teams, media buyers and ad tech professionals.
Related Ad Testing Tools
VAST Tag Tester
Validate and inspect VAST video advertising tags.
VAST Validator
Inspect VAST XML and investigate common configuration problems.
HTML5 Ad Tester
Preview and debug HTML5 advertising creatives.
VMAP Tester
Inspect video ad break configurations.
MRAID Tester
Test MRAID based advertising creatives.
Ad Tag Validator
Inspect advertising tags and troubleshoot implementation issues.