---
title: "Free Website Tools"
description: "Free online tools from Testomato — SSL certificate checker, DNS lookup, and more. Diagnose your website without signing up."
url: "https://testomato.com/tools/"
---

# Free **Website Tools**

Check an SSL certificate, DNS records, HTTP headers or open ports, or see how AI agents read your pages. Built by the team behind Testomato.

- Free to use
- No sign-up
- Shareable result links

## Security

Check your certificate, your security headers and the ports your server leaves open.

[Monitor SSL 24/7](https://testomato.com/ssl-monitoring/)

- ### [CSP Generator](https://testomato.com/tools/csp-generator/)

  Generate a Content Security Policy from your live site or a preset, with a security grade, config findings, and bypass detection.

- ### [Network Exposure Checker](https://testomato.com/tools/network-exposure/)

  See which ports and services your server exposes to the internet, and which of them deserve a second look.

- ### [SSL Certificate Checker](https://testomato.com/tools/ssl-checker/)

  Check SSL certificate validity, expiry date, issuer, and certificate chain for any domain.

## Network & uptime

Look up DNS records, inspect HTTP responses and see how much downtime your SLA allows.

[Monitor uptime 24/7](https://testomato.com/uptime-monitoring/)

- ### [DNS Lookup](https://testomato.com/tools/dns-checker/)

  Look up DNS records (A, AAAA, CNAME, MX, TXT, NS) from multiple global server locations.

- ### [HTTP Response Inspector](https://testomato.com/tools/http-inspect/)

  Send an HTTP request with any custom headers and inspect the full response — status code, all response headers, and a body preview.

- ### [SLA Uptime Calculator](https://testomato.com/tools/sla-calculator/)

  Convert any uptime percentage into allowed downtime per period, or check if an outage duration exceeded your SLA target.

## Content, SEO & AI

See your pages the way search engines and AI agents read them.

[Monitor content 24/7](https://testomato.com/website-monitoring/)

- ### [Markdown for Agents Checker](https://testomato.com/tools/accept-markdown/)

  Test whether your website serves Markdown via HTTP content negotiation — essential for AI agent readiness.

- ### [Website Content Extractor](https://testomato.com/tools/content-extractor/)

  Extract clean, structured content from any public webpage as JSON, HTML, plain text, Markdown, or a distraction-free reading view.

- ### [JSON-LD Schema Generator](https://testomato.com/tools/json-ld-generator/)

  Build Google-friendly structured data for Organization, Local Business, FAQ, Article, Product or Breadcrumb — and copy a ready-to-paste script tag.

## Turn a one-off check into continuous monitoring

You can try it all free for 14 days with **no credit card** and **no commitment**.

[Try Testomato for Free](https://testomato.com/sign-up/ "Try Testomato for Free")