Free ePulz.io network tools
· 7 min read
SSL checker, HTTP headers, DNS lookup, WHOIS, IP geolocation, ping, ports and more free network tools from ePulz.io. No signup, no logs.
How they came about
While building the ePulz.io monitoring service, we found that a large part of our debugging time on customer issues went into trivial network introspection: is the SSL valid?, where does that A record point today?, what do different DNS resolvers see?.
Existing online tools mostly had one or more of these issues: - They required registration (mxtoolbox). - They were full of ads (whatismyipaddress.com). - They sent your data through tracking pixels.
So we built a set of simple tools for ourselves and made them public. No registration, no tracking, no query storage.
1. SSL Certificate Check
For a given domain it shows: - Expiration date and remaining days. - Issuer (Let's Encrypt, DigiCert, GlobalSign, ...). - Subject and SAN (how many domains the certificate covers). - Whether the chain is valid (is an intermediate missing?). - TLS version and cipher suite used in the handshake.
Useful before a DNS-changing deploy or after a server migration.
2. HTTP Security Headers
Scans security HTTP headers: - Strict-Transport-Security (HSTS) - Content-Security-Policy (CSP) - X-Frame-Options - X-Content-Type-Options - Referrer-Policy - Permissions-Policy
The output includes a numeric score in Mozilla Observatory style and concrete suggestions on which headers to add.
3. DNS Lookup
Queries A, AAAA, MX, TXT, CNAME, NS records. The resolver is Cloudflare 1.1.1.1 over DNS-over-HTTPS - no MITM from a local resolver and no ISP logs.
The output comes in both raw and parsed views, so you can see TTL and flags.
4. WHOIS / Domain Expiry
For a given domain it returns: - Expiration date. - Registrar (where the domain is registered). - Creation and last update. - Status flags (clientTransferProhibited, redemptionPeriod, ...).
Useful when transferring domains between registrars or checking when you need to renew.
5. IP Geolocation
The input is an IP address or a hostname (the hostname is resolved via DNS first). It returns: - Country (from a local offline dbip Lite database - no external calls). - City and region (via the public ipinfo.io API). - ASN and ISP/organization. - Reverse DNS (PTR).
Helps with identifying a customer in access logs or with an initial investigation of suspicious traffic.
6. DNS Propagation Checker
Queries 5 global DNS resolvers (Cloudflare, Google, Quad9, OpenDNS and others) for the same record simultaneously. A visual table shows what each one returned.
If the answers differ, it is a typical sign of a DNS change in progress: the old record has not yet expired its TTL at some resolvers.
7. What is My IP
Shows your public IP, country, ISP, browser, operating system, screen resolution, timezone and a few other client-side details. IPv4 and IPv6 are supported.
Useful when talking to tech support (what's your IP?) or setting up firewall rules for access from your home network.
8. HTTP Status Checker
Sends a single GET request from our servers and reports the HTTP status code, the full redirect chain, the response time and the Server header. The fastest way to confirm whether a site is up or down from the public internet, independent of your own network.
9. Port Checker
Tests whether up to 10 TCP ports are open on a host (22 SSH, 80 HTTP, 443 HTTPS, 3306 MySQL and others). Useful for verifying a firewall rule, a freshly opened service, or a database that should not be exposed to the public internet.
10. Ping Test
Measures round-trip latency to a host using ICMP with a TCP fallback. Shows minimum, average and maximum time plus packet loss, so you can tell a slow server from an unreachable one.
11. HTTP/2 Test
Opens a real TLS connection and negotiates the protocol via ALPN, exactly like a browser. Tells you whether the server supports HTTP/2, the TLS version, and reads the Alt-Svc header for an HTTP/3 (QUIC) hint. HTTP/2 is one of the easiest performance and Core Web Vitals wins available.
12. Robots.txt Tester
Fetches a site's robots.txt, parses every rule group and tests whether a specific URL is allowed for a chosen crawler. Our matcher uses Google's real longest-match precedence (with the * wildcard and the $ anchor), so the verdict matches Googlebot, unlike libraries that use first-match.
13. Sitemap Validator
Validates an XML sitemap or sitemap index: counts URLs, checks the structure against the sitemaps.org schema and the 50,000 URL / 50 MB limits, and measures coverage of lastmod, changefreq, priority, hreflang and image tags. Gzipped sitemaps are supported.
A few more live on the full tools page: a one-click SEO and Core Web Vitals analyzer, a brand kit and color palette generator, and an uptime / SLA calculator. There are 16 free tools in total, no registration for any of them.
Common properties of all tools
- No registration. Open the URL, get an answer.
- No tracking cookies. No Google Analytics, no Facebook pixel.
- No IP/query history logs. Your queries are not stored.
- EU hosting (Slovakia), GDPR compliant.
- 14-language UI: sk, cs, en, de, pl, hu, fr, es, it, pt, nl, ru, uk, tr.
The main service
These tools are ad-hoc utilities. The main ePulz.io product is uptime monitoring with notifications (Telegram, email, webhook), status pages, SSL expiry warnings and LAN monitoring via pull-agent.
7-day trial with 3 monitors, no credit card: epulz.io.
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