Techvenation has built a growing collection of free browser-based IT utilities for everyday troubleshooting, planning and technical checks. The directory covers public IP information, network calculations, DNS and email, domains, websites, cybersecurity, CCTV/storage, infrastructure, AMC planning and developer utilities.

Open the complete live directory here: Techvenation Free IT Tools. Most tools are designed to answer one narrow technical question quickly, which makes them useful before deeper troubleshooting or when collecting information for an IT support request.

IT Tools

• What Is My IP — Show your public IPv4, public IPv6, local/LAN address when exposed by the browser, and approximate IP-based location.
• IP Lookup — Inspect a public IP address with reverse DNS, ASN/network registration and approximate geolocation details.
• IP & Network Tools — Run quick DNS and safe public-network connectivity checks from one page.
• Internet Speed Test — Measure ping, jitter, sustained download speed and sustained upload speed, with a 1 GB download-time estimate.
• Website Health Check — Check website availability, HTTPS, response time, basic SEO signals, robots/sitemap presence and common configuration issues.
• Cyber Risk Scanner — Run a non-invasive website security posture check covering TLS, security headers and selected email-security controls.
• DNS & Email Checker — Inspect DNS and business-email configuration including MX, SPF, DMARC and DKIM.
• SSL Checker — Inspect an HTTPS certificate, issuer, validity period, hostname match and days remaining.
• Uptime Monitor — Monitor website availability and response time and receive notifications when a configured monitor changes state.
• Hardware EOL Checker — Search lifecycle records for hardware end-of-sale and end-of-support dates.
• IT AMC Calculator — Estimate monthly IT AMC scope and pricing based on users, devices, branches, visits and equipment.
• Data Breach & Password Leak Checker — Check breach exposure for an email when HIBP access is configured and safely check passwords against Pwned Passwords.

Network

• IP Subnet Calculator — Calculate network, mask, broadcast, usable range and host count.
• CIDR Calculator — Convert CIDR prefix to subnet mask, wildcard mask and address capacity.
• IP Range Calculator — Calculate the number of IPv4 addresses between two addresses.
• IPv4 ↔ Binary Converter — Convert an IPv4 address to binary, integer and hexadecimal forms.
• Subnet Cheat Sheet — Quick reference for /8 through /32 masks and host capacities.
• Port Checker — Check one common TCP service port on a public host.
• Reverse DNS Checker — Find PTR/reverse-DNS hostname for a public IP.
• Server Reachability / Ping Tool — Measure safe TCP reachability latency to HTTPS/HTTP on a public host.
• MAC Address Vendor Lookup — Identify the manufacturer/OUI for a MAC address using the free MACVendors lookup service.
• MAC Address Generator — Generate locally administered unicast MAC addresses for labs and testing.
• Bandwidth Calculator — Convert Mbps/Gbps to MB/s and estimate usable throughput.
• Download Time Calculator — Estimate transfer time from file size and connection speed.
• VLAN / Network Planner — Create a simple private-IP VLAN plan from device counts.
• DHCP Pool Calculator — Calculate a DHCP allocation range within an IPv4 subnet.
• Wi-Fi Channel Guide — Reference recommended non-overlapping Wi-Fi channels and planning notes.
• Wi-Fi Coverage Estimator — Estimate access-point count from floor area, users and environment.

DNS & Email

• DNS Propagation Checker — Compare DNS answers from your server, Google Public DNS and Cloudflare 1.1.1.1.
• DNS Record Lookup — Inspect A, AAAA, MX, TXT, NS, CNAME and SOA records.
• MX Lookup — Check mail exchanger records and priorities.
• SPF Checker — Find SPF records and flag common configuration problems.
• DMARC Checker — Inspect DMARC policy, reporting and enforcement level.
• DKIM Checker — Look up a DKIM TXT record using a supplied selector.

Domain

• WHOIS / RDAP Lookup — Look up public registration data for a domain or IP using RDAP.
• Domain Age Checker — Show registration date and approximate domain age from RDAP data.
• Domain Expiry Checker — Show domain expiration date and days remaining when RDAP publishes it.
• Domain Health Checker — Combine DNS, website, SSL, email-security and RDAP checks into one score.

Website

• HTTP Header Checker — Display response headers returned by a public website.
• Redirect Checker — Follow and display an HTTP redirect chain safely.
• HTTP Status Checker — Check the current HTTP status code for a public URL.
• Website Response Time — Measure server response time from your WordPress hosting server.
• Website Technology Detector — Identify common CMS, CDN and server technologies from public signals.
• Robots.txt Checker — Find robots.txt and display indexing directives.
• Sitemap Checker — Check common XML sitemap locations and status.
• SSL Expiry Calculator — Check TLS certificate expiry and remaining days.

Security

• IP Blacklist Checker — Run an indicative check against several public DNS-based blocklists.
• Security Header Checker — Check CSP, HSTS, frame protection, MIME protection and related headers.

Infrastructure

• RAID Calculator — Estimate usable capacity and basic fault tolerance for common RAID levels.
• NAS Storage Calculator — Estimate raw and usable NAS storage including a simple filesystem reserve.
• UPS Runtime Estimator — Roughly estimate runtime from battery energy, efficiency and load.
• PoE Budget Calculator — Calculate switch PoE budget from cameras, APs, phones and other devices.
• CCTV Storage Calculator — Estimate recording storage from camera count, bitrate, hours and retention days.
• CCTV Bandwidth Calculator — Estimate aggregate camera network bandwidth and headroom.
• NVR HDD Calculator — Estimate required HDD count for a CCTV retention target.
• Server Uptime Calculator — Convert availability percentage into allowed downtime.
• SLA Calculator — Calculate maximum monthly and yearly downtime for an SLA target.

Business

• IT Infrastructure Calculator — Create a starting infrastructure estimate for an office.

Developer

• CSR Decoder — Decode a PEM certificate signing request without storing it.
• SSL Certificate Decoder — Decode a PEM X.509 certificate without storing it.
• Hash Generator — Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text.
• Hash Checker — Compare text against a supplied MD5/SHA hash.
• Base64 Encode / Decode — Encode or decode Base64 text.
• URL Encode / Decode — Encode or decode URL components safely.
• JSON Formatter / Validator — Validate JSON and return the parsed structure and formatted JSON.
• JWT Decoder — Decode JWT header and payload without verifying the signature.
• Timestamp Converter — Convert Unix timestamps and date strings to UTC and WordPress local time.

Which tool should you start with?

For a general business IT check, start with Website Health Check, Cyber Risk Scanner, DNS & Email Checker and Internet Speed Test. Network engineers may prefer the subnet/CIDR/VLAN tools, while CCTV and infrastructure teams can use the PoE, storage, NVR, RAID and NAS calculators.

The tools are diagnostic and planning aids. A successful check does not guarantee that a system is secure, compliant or correctly designed for every environment. Business-critical decisions should still be verified against the relevant vendor, administrator, standard or professional assessment.

Need help after using a tool?

If a result identifies a problem, contact Techvenation on WhatsApp for UAE IT support, cybersecurity, networking, server/NAS, CCTV/ELV, website support, business software or an IT AMC quotation.