All Ad Specs - Ad Specs Tester

Ad Specs Tester is a comprehensive browser-based validation tool designed specifically for digital advertisers, agencies, and creative professionals who need to ensure their ad creatives meet the technical requirements of major advertising platforms. This free tool streamlines the often-complex process of checking advertisements against thousands of placement specifications from industry-leading publishers including Facebook, Instagram, TikTok, and numerous other platforms.
The platform addresses a critical pain point in digital advertising: verifying that ad creatives comply with platform-specific technical requirements before submission. Rather than manually cross-referencing specifications or discovering compliance issues after submission, users can instantly validate their work directly in their browser with immediate, detailed feedback.
Ad Specs Tester supports multiple ad formats and file types, accommodating the diverse creative needs of modern advertising campaigns. Users can upload and test image files, video content, audio files, and HTML5 rich media creatives. This comprehensive format support ensures that whether you're running display campaigns, video advertisements, audio content, or interactive rich media experiences, the tool provides relevant validation.
The tool's validation process is straightforward and user-friendly. After uploading a creative file, users select the specific placement they're targeting and choose a preview device type. The system then compares the uploaded file against the placement's technical requirements, checking critical specifications including dimensions and file sizes, format compatibility, safe zone boundaries, and copy length limitations. Results display three columns of information for each requirement: the measured value from the uploaded file, the required value for that placement, and a clear pass or fail indicator.
One of Ad Specs Tester's standout features is its extensive specification database covering more than 4,000 placements across major advertising networks. This comprehensive coverage means users can validate against virtually any standard placement they might encounter in their advertising campaigns, from standard display ads and social media placements to specialized formats across different platforms.
For advertisers working with video inventory, the tool includes specialized VAST tag validation capabilities. Users can input VAST tags directly, and the tool will fetch and analyze the tag along with any wrapper tags in the browser environment. This is particularly valuable for programmatic video campaigns where VAST compliance is essential. In cases where an ad server blocks direct fetching of VAST tags, users can copy and paste the XML code directly, ensuring validation remains possible regardless of technical barriers.
Privacy and security are built into Ad Specs Tester's core functionality. Unlike many online validation tools that require file uploads to remote servers, all file checking and processing occurs directly within the user's browser. Creative files are never uploaded to external servers, ensuring that sensitive campaign materials remain confidential and secure throughout the validation process. This browser-based processing also means faster results without bandwidth delays.
The tool provides flexible usage options to accommodate different user needs. Unregistered visitors receive three free validation checks per day, allowing users to test the tool and validate their occasional projects without any commitment. Users who sign in with an email address unlock a significantly higher limit of 50 checks per day, making the tool practical for agencies and professionals managing multiple campaigns. This tiered approach ensures the tool remains accessible to everyone while providing power users with the capacity they need.
Ad Specs Tester includes export functionality for documentation and reporting purposes. Users can export their validation results to PDF format, creating records of their testing for internal documentation, client reporting, or compliance verification. This feature is particularly valuable for agencies and larger organizations that need to document their quality assurance processes.
The tool's freemium model makes professional ad validation accessible to independent creators, small agencies, and freelance designers while offering sufficient capacity for established marketing teams. The interface prioritizes efficiency and clarity, presenting complex technical information in an understandable format that doesn't require deep platform knowledge to interpret results.
Ad Specs Tester eliminates the guesswork from ad creative preparation, reducing the likelihood of rejection or poor performance due to technical non-compliance. By catching specification mismatches before submission, users save time on re-uploads and revisions, accelerate their campaign launch timelines, and ensure their creative work displays