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API & MCP

VAST Lint

Detect and validate VAST XML on any page. IAB VAST 2.0–4.3, SIMID, VPAID. 121 rules. Wrapper chains. By vastlint.org.

As of June 2026, VAST Lint has 9 users and a 5.00/5 rating from 2 reviews in the Developer Tools category.

Developer Tools
Chrome Web Store ↗.crx
Usersno change0%
9
9
Ratingno change0%
5.00
2 reviews
Reviewsno change0%
2
Version
0.4.22
Manifest V3
90-day change · In the last 90 days this extension 7 version updates.

History

8 snapshots

Tracking since Apr 30, 2026.

10.566.52.4399999999999995Apr 30, 2026Jun 14, 2026
View as table
DateUsersRatingReviewsVersion
Apr 30, 2026———0.3.7
May 7, 2026———0.3.7
May 11, 202635.0010.4.10
May 17, 202655.0020.4.11
May 23, 202665.0020.4.16
May 30, 202695.0020.4.17
Jun 5, 2026105.0020.4.18
Jun 14, 202695.0020.4.19
Now95.0020.4.22

Changelog

  • May 17, 2026
    short_description
    Detect and validate VAST XML on any page. IAB VAST 2.0–4.3, SIMID, VPAID. 118 rules. Wrapper chains. By vastlint.org.
    Detect and validate VAST XML on any page. IAB VAST 2.0–4.3, SIMID, VPAID. 121 rules. Wrapper chains. By vastlint.org.
  • May 7, 2026
    short_description
    Detects VAST XML on the page and shows inline validation errors & warnings powered by vastlint.
    Detect and validate VAST XML on any page. IAB VAST 2.0–4.3, SIMID, VPAID. 118 rules. Wrapper chains. By vastlint.org.

Permissions & access

Permissions
activeTabstorage
Host access
<all_urls>

Screenshots

VAST Lint screenshot 1VAST Lint screenshot 2VAST Lint screenshot 3VAST Lint screenshot 4

About

vastlint validates VAST XML ad tags directly in your browser — no copy-pasting into external tools.

When you open a VAST XML URL, vastlint automatically:
• Highlights every error, warning, and info issue inline on the correct line
• Draws squiggly underlines under the offending XML element
• Shows the rule ID and severity inline with the code
• Displays the full error message and spec reference on hover
• Links every rule to vastlint.org/docs for detailed fix guidance

Supports VAST 2.0, 3.0, 4.0, 4.1, and 4.2.

Built on vastlint — a fast, spec-accurate VAST validator written in Rust and compiled to WebAssembly. All validation runs locally in your browser. No data is sent to any server.

Open source: github.com/aleksUIX/vastlint

Technical

Version
0.4.22
Manifest
V3
Size
243KiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
chbbcgdpdpcmkocbmeljkfefeeknghnb
Developer ID
u483835f13d51b1479c95af5c47b53c07
Developer Email
[email protected]
Created
Apr 29, 2026
Last Updated (Store)
Jun 10, 2026
Last Scraped
Jun 14, 2026
Website
—

Data sourced from the Chrome Web Store · last verified Jun 14, 2026.