Add UTM parameters while preserving the query and #fragment, with correct encoding and case warnings
Landing Page Builder
Build a landing page from components (headline, benefits, FAQ with JSON-LD, call-to-action, footer) with a live preview, UTM tags and optional tracking, plus colour contrast, page size and misleading-phrase checks.
Workspace
How the result is calculated
The page is built as one HTML file with inline styles and no libraries: a single H1, a description, a benefits list, an FAQ using <details> with FAQPage JSON-LD (the < character is escaped), a repeated call-to-action button at the bottom and a footer. All text is escaped (& < > " '). UTM tags are added to the button link with URLSearchParams. Contrast follows WCAG: relative luminance ratio (L1+0.05)/(L2+0.05), required ≥ 4.5 for text on the background (the button text colour is chosen white or black, whichever contrasts more, so it always reaches about 4.58 or more). Checks: size ≤ 100 KB, title ≤ 60 characters, an https link, a footer, and a list of phrases that may be considered misleading. The preview runs in an iframe without scripts.
Limits:
This is not Lighthouse nor a policy or legal review: the check is a set of simple rules and the phrase list is small and does not guarantee acceptance by any ad network. Follow your network’s policies, do not mislead and show the required disclosures. Tracking code you paste is injected as is (your responsibility). Only a single HTML file is exported (no ZIP, no embedded image assets). There are no ready-made niche templates yet.
FAQ
Will any network accept the page?
No guarantee; each network has its own policies.
Why a contrast warning?
The button colour or theme does not reach the WCAG 4.5 ratio; change the colour.
