5 free Chrome extensions

Free Chrome tools to see inside any website

Check your own site's tracking, SEO and conversion, see what a competitor runs, and show your developer exactly what to fix. No account, no paid plan, and nothing leaves your browser.

  • Free, no account
  • Reads a page only after your click
  • One-page PDF report
any-website.com
One click answers
Is every tag and event really firing?Hitline: events, GTM and consent, liveDevTools
What do Google and AI crawlers really see?Serpline: SEO score, render and AI botsSide panel
What is this competitor running?Rivaline: stack, ads and brand kitSide panel
Why is this landing page not converting?Foldline: 27 checks and a scoreSide panel
How do I show exactly what to change?Markline: capture, mark up, sharePopup
The tools

Five extensions, one job each

Four look at your own site, one looks at your competitors. Each opens next to the page you are on, answers one question well and gives you a report you can send.

What do you do?

All five tools. Pick a role to see where to start.

Analysts and marketers

Is every tag and event really firing?

Watch GA4, Meta, TikTok and Google Ads events as they fire, check GTM, server-side GTM and consent, then export an audit.

  • Live event feed for each platform
  • GTM, server-side GTM and Consent Mode checks
  • Your tracking plan against what really fires
Coming soon
SEO specialists

What do Google and AI crawlers really see?

SEO basics with a score, a Google preview, raw HTML against the rendered page, links with status and AI crawler access.

  • Score and Google result preview
  • Raw HTML against the JavaScript render
  • Which AI bots robots.txt lets in
Coming soon
Marketers, agencies, sales

What is this competitor running?

Their marketing stack and its gaps, their ads in four ad libraries and their brand colors and fonts.

  • Martech stack by category, with gaps
  • Meta, Google, TikTok and LinkedIn ad libraries
  • Brand colors, fonts and main button
Coming soon
Campaign managers, CRO

Why is this landing page not converting?

27 checks on the first screen, form, trust, mobile, speed and contact, with a fix for every issue.

  • Fold line drawn on the page
  • Desktop and mobile score
  • Fixes to send to your developer
Coming soon
Agencies, QA, designers

How do I show exactly what to change?

Capture the page, mark it up with arrows, numbered notes and blur, then download or copy it.

  • Visible, full page, area or element
  • Emails and phone numbers blurred for you
  • PNG or a one-page PDF summary
Coming soon
What each tool looks at

One page, five questions

Your site or a competitor's, every page has the same five places worth a look. Click a number to see which tool checks it.

Spring sale: 30% off all plants | Greenly
GreenlyPlantsPotsCare

Fresh plants, delivered in two days

Shop the sale
The title in the tab

Will Google and AI search show this page well?

What Serpline tells you
  • Where Google cuts the title and description
  • Whether the H1 and text need JavaScript to appear
  • Which AI crawlers robots.txt lets in
Same promise in every tool

Your pages stay in your browser

Free, no account

No sign-up, no trial, no paid plan. Install and use.

Only after your click

A tool reads a tab when you open it there, and no other tab.

Nothing is sent

Results are made in your browser. No servers, no tracking inside the extensions.

A report to send

Every tool turns its result into a one-page PDF you can share.

Free web tools

Try it without installing anything

Four small tools that run right on this site, built on the same code as the extensions.

Ad library finder

Search one brand in the Meta, Google, TikTok and LinkedIn ad libraries at once.

Coming soon

Landing page score

Tick what your page has and get the score Foldline would give it.

Coming soon

Google preview

See where Google cuts your title and description on desktop and mobile.

Coming soon

Annotate an image

Drop a screenshot, add arrows, notes and blur, then download a PNG.

Coming soon
FAQ

Questions people ask

Not answered here? Ask me directly.

Are the tools really free?

Yes. There is no paid plan and no trial. They are free because they show the kind of work I do for clients: if you need the fixes done, you know where to find me.

What data do the extensions collect?

None. Each extension saves only its own settings on your computer. The pages you check are read in your browser and nothing is sent to a server.

Do they slow down Chrome?

No. Nothing runs in the background. A tool only works on a tab after you click its icon or press its shortcut there.

Which one should I install first?

Pick your role in the tool list above. If you run paid campaigns, start with Hitline: broken tracking costs the most and is the hardest to see.

Can I use them for client work?

Yes. Agencies use the PDF reports in audits and pitches. The reports carry a small "Made with" line and nothing else.

Which languages do they support?

English and Azerbaijani. You can switch the language in each tool's settings.

Built by one person

Need the fixes done, not just found?

I am Shamistan Isayev. I work on analytics, server-side tracking and CRO, and I built these tools for the checks I run on every project. When you want someone to fix what they find, book a call.

Book a callFrom Shamistan Isayev