2 Free GitHub Repos Every Marketer Needs: Humanizer for Your Words, Playwright for Better UX and Conversions

Humanizer is a free Claude skill that removes common signs of AI writing and rewrites text in your own voice. Playwright is Microsoft’s free browser automation tool. Connected to an AI agent, it tests your landing page like a real customer, so you catch UX and conversion problems before you spend on ads.

Key takeaways

Humanizer uses 33 patterns from Wikipedia’s “Signs of AI writing” guide
Give it 2–3 paragraphs of your own writing and it matches your voice
Playwright MCP lets Claude, Codex or other agents test pages in a real browser
Check UX and conversions before ad spend: visible button, working links, form and thank-you page

Signal one: Humanizer for your words

Humanizer is an open-source skill on GitHub, built on Wikipedia’s guide to the signs of AI writing. It looks for 33 patterns, each with a before-and-after example. Typical ones are “it’s not just X, it’s Y” contrasts, inflated words, forced lists of three and too many dashes. If you paste two or three paragraphs you wrote yourself, it rewrites towards your rhythm and word choice, then checks its own output and rewrites again.

How to set it up:

In Claude Code, clone the repo into your skills folder: git clone https://github.com/blader/humanizer ~/.claude/skills/humanizer
In the Claude app, add it as a custom skill under Settings → Capabilities → Skills.
Paste a sample of your own writing, then ask: “Humanize this draft in my voice.”

Be honest about what it does: it improves style, not facts. Always re-check names, numbers and claims. No tool can guarantee passing AI detectors, so aim for writing that genuinely helps the reader.

Signal two: Playwright for better UX and conversions

Playwright is Microsoft’s open-source browser automation tool. Version 1.64 was released on 7 October 2026. With Playwright MCP connected, an AI agent such as Claude or Codex can open pages, click, type and report back like a real customer. For coding agents, Microsoft also offers a Playwright CLI, which it describes as more token-efficient.

A ready-to-use prompt:

“Open our landing page on a mobile screen, like a first-time visitor. Is the main button visible without scrolling? Do all the links work? Fill the enquiry form with test data, submit it, and check the thank-you page loads. Take a screenshot of each step.”

A 2-minute UX and conversion check before every campaign:

The main call-to-action is visible on mobile without scrolling
No broken links on the landing page
The enquiry form submits without errors
The thank-you page loads (it’s often where conversion tracking fires)
The page is easy to use on a normal phone screen

A practical example

A Kolkata coaching institute plans a ₹50,000 Meta ad campaign for admissions. Before launch, the team runs both checks. Humanizer cleans the landing page copy so it sounds like the institute, not a template. Playwright tests the page on a mobile screen and finds two problems: the “Enquire now” button sits below the fold, and the form doesn’t reach the thank-you page, so conversions wouldn’t be tracked. Fixing both before launch protects the whole ad budget. [CONFIRM: replace with a real Zebra Techies client example, only if it actually happened.]

Two safety rules

Use clearly marked test data so fake leads don’t mix with real ones in your CRM.
Only test websites you own or are authorised to manage.

Frequently asked questions

Is Humanizer free?

Yes. It’s an open-source skill on GitHub that you add to Claude.

Will Humanizer make my content pass AI detectors?

No tool can guarantee that. It removes common AI writing patterns and improves style, but you should focus on accurate, useful content.

How does Playwright help conversions?

It lets an AI agent test your page like a real customer. It catches hidden buttons, broken links and failed forms that quietly lose leads, before you spend on ads.

Is it safe to test a live lead form?

Yes, if you use clearly marked test data and only test sites you manage.

Sources: github.com/blader/humanizer; github.com/microsoft/playwright-mcp; Playwright 1.64 release notes; Wikipedia, “Signs of AI writing”. [CONFIRM: add exact URLs.]