Slow internet or WiFi complaints
Start with the Internet Speed Test, then compare WiFi and Ethernet under similar conditions. If latency is unstable, run an IP ping test. For mail or website issues, verify published records with the DNS lookup tool.
Internet & network utilities
Zerolink Tools Hub
Practical browser-based utilities for internet users, businesses, installers and IT teams.
12 focused utilitiesNo software installationMobile-friendly tools
What is the Zerolink Tools Hub?
This page is the central home for Zerolink’s free, browser-based internet and network utilities. From here you can reach speed testing, IP information, DNS lookups, ping and traceroute checks, port testing, bandwidth planning, website audits, router setup guidance and CCTV calculators.
The tools are built for home users, small offices, IT staff and installers who need quick diagnostics, readable results and no software installation. Where possible, checks run in your browser or through bounded server-side requests; sensitive credentials are not placed in public URLs.
Where to start for common problems
New broadband or router setup
Use the router login guide for gateway addresses and a secure setup order. After WAN configuration, confirm service with the speed test and What Is My IP tools.
Office, website or server checks
For domain problems, begin with DNS lookup and the Network Diagnostics Suite. Test authorised public services with the Port Checker. For page performance, use the Website Speed and Structure Audit. To review where a suspicious login or server IP is registered, use the IP location tracker.
Understand the tool categories
IP Utilities
Public IP checks, approximate location lookup, ping, blacklist status and port testing. Results can differ on VPN, mobile networks or proxy paths, so compare tests under similar conditions.
Network Diagnostics
DNS lookup, bandwidth conversion, internet speed testing and a combined diagnostics suite. Useful when you need to separate connectivity, capacity and routing problems.
Web and SEO
Website response timing, HTML structure review and an SEO metadata generator. Helpful for developers and marketing teams preparing technical checks before launch.
Deployment Guides
Router login references, secure Wi-Fi setup steps and CCTV storage, PoE and RTSP planning. Field-ready checklists and calculators for installers and property teams.
Popular Tools
All Tools by Category
IP Utilities
Network Diagnostics
Web and SEO
Deployment Guides
Tools hub questions
Are Zerolink tools free to use?
Yes. The utilities run in your browser at no charge and most checks do not require an account.
Do I need to install software?
No. The tools are web-based and work on modern mobile and desktop browsers without a separate download.
Where should I start for a slow internet complaint?
Begin with the speed test, then compare WiFi and wired results. If only one website is slow, run a DNS lookup; if everything is slow, review the router guide and ping test next.
Can an IP location tool show an exact home address?
No. IP geolocation is approximate and usually shows a city or provider service area, not a precise street address or person.
Can I test any IP address or port?
Use the port checker and network tools only on public systems you are authorised to assess. Do not use them for unauthorised scanning.
Are default router passwords always correct?
No. Credentials vary by model, firmware and internet provider. Treat the device label and official manual as the authoritative source.
Are tool results useful for ISP complaints?
Repeated speed tests, ping checks and DNS lookups can help document a problem, but base complaints on several comparable tests rather than one snapshot.
How can I suggest a new tool?
Use the feedback form at the bottom of this page. The team prioritises requests that solve a clear diagnostic or planning need.
Suggest an ImprovementReport an issue or request a utility
Share tool issues, feature requests, or device models to add. Email is required for follow-up.
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