Add toolshref to transformation section

[toolshref-tools]

What's being added
Two free tools, no-signup browser-based developer tools to the Generator and transformation section:

Tool Description

• transformation Section
• ToolsHref JSON-to-Mermaid - Online JSON-to-Mermaid visualization tool.
• Generator Section
• Toolshref ZOD Schema Generator - Generate JSON to TypeScript Zod validation schemas instantly.

Why they fit
All tools are:

🆓 100% free with no premium tiers
🌐 Browser-based, no downloads needed
🔒 Privacy-friendly (data stays in browser)
✅ No signup required

Thank you for maintaining this awesome list!

[moimikey]

Hey toolshref-tools! Thanks for your submission! 🚀

To keep awesome-devtools instantly accessible for everyone, all tools must be:

• Browser-based — no downloads or native app installs
• Direct link — goes straight to the tool (not a multi-tool landing page)
• 100% free — no signups, trials, paywalls, or usage limits

Please make sure your PR meets these criteria. It may take some time for your submission to be reviewed — you can occasionally comment with a "bump" to bring more attention to it.

Thanks for contributing! 🙌

[moimikey]

this is great. thanks!

[github-actions]

Summary

Status	Count
🔍 Total	145
✅ Successful	106
⏳ Timeouts	1
🔀 Redirected	32
👻 Excluded	0
❓ Unknown	0
🚫 Errors	6
⛔ Unsupported	0

Errors per input

Errors in README.md

• [403] http://codepen.io/pen | Rejected status code: 403 Forbidden (configurable with "accept" option)
• [ERROR] http://lab.maltewassermann.com/viewport-resizer/ | Network error: Connection failed. Check network connectivity and firewall settings (error sending request for url (http://lab.maltewassermann.com/viewport-resizer/)): Connection failed. Check network connectivity and firewall settings
• [TIMEOUT] http://selfsignedcertificate.com/ | Timeout
• [403] https://cors-anywhere.herokuapp.com/ | Rejected status code: 403 Forbidden (configurable with "accept" option)
• [ERROR] https://jsontochart.com/ | Network error: Connection failed. Check network connectivity and firewall settings (error sending request for url (https://jsontochart.com/)): Connection failed. Check network connectivity and firewall settings
• [403] https://web-check.xyz/ | Rejected status code: 403 Forbidden (configurable with "accept" option)
• [403] https://www.iconfinder.com/ | Rejected status code: 403 Forbidden (configurable with "accept" option)

Full Github Actions output