Developers don't take your word for anything.
Devtool pages are built by people who know the product too well for an audience that trusts nothing it can't verify. That combination leaks in specific, repeatable ways - and they are invisible from the inside. A Squint teardown reads your page the way a skeptical engineer does, at real desktop and mobile viewports, and hands you the replacement lines, not a lecture.
The leaks we keep finding on devtool pages - each one documented in a published teardown:
- The anonymous hero. The fold spends itself on category chips and a product switcher while the proof - customer counts, named logos, CEOs on record - sits 4,000 pixels down. A comparison shopper decides between you and the incumbent from a first screen that shows no reason to believe. Teardown #005 found exactly this on Dub, a page whose below-the-fold proof is better than almost any competitor's.
- The fold that never asks. The page is beautiful, the headline is confident, and the only conversion element on the entire first screen is a 68x32-pixel pill in the far corner of the nav - while the announcement link beside the subhead sends warm visitors sideways into a feature page. Teardown #009 found exactly this on Linear, one of the most disciplined pages in B2B SaaS.
- Stats counters that render as zeros. Count-up animations write "0 links created, $0.00 tracked" into the static document. Crawlers, fast scrollers, readers on throttled connections, and anyone whose browser skipped the animation sees your scale metrics as literal zeros - the opposite of the intended effect.
- The announcement pill in the highest-attention gap. The launch-week badge ("Introducing...") parks between the headline and the value proposition, in the most-read pixels on the page, and points away from conversion. Both #004 and #005 caught a version of this.
- The pivot vocabulary that outruns the product. The fold names the category you want to own next, while the thing people actually buy goes unnamed - the sentence that explains it demoted to a rotating caption on the far side of the screen. Teardown #012 found exactly this on Vercel, where "Agentic Infrastructure" replaced any mention of what you deploy.
- Dashboard screenshots as decoration. At 390px wide, that beautiful product shot's labels and chart values are unreadable - it proves software exists without showing what it does. On mobile it usually also gets cropped by the fold, so it spends a third of the first screen saying nothing.
- Mobile CTAs built for mouse pointers. Tap targets under the 44px guideline, secondary buttons drawn physically larger than the primary, and the persistent header CTA that quietly vanishes on the one device where scroll depth matters most.
See the standard on real devtool pages: teardown #009 reviews Linear - first impression scores 8, CTA focus 5, and the teardown says both plainly - #012 does the same for Vercel, #005 for Dub, and #004 for Fathom Analytics. Strong pages get told they are strong; the fee buys the leaks, not invented problems.
What you get for $19: the squint test, an annotated desktop + mobile walkthrough, copy rewrites you can paste in, a structure/CTA/proof audit, and a fix list ranked by impact against effort. Automated capture and analysis; the report is typically in your inbox within minutes. 14-day no-questions refund.