Free online networking tools to help you manage, troubleshoot, and understand your home or office network. 199 tools — all run in your browser with no software to install.
Check if an IP address is a bogon — private, reserved, loopback, link-local, or otherwise .
Free two-way CIDR converter. Convert any CIDR prefix (/24) to subnet mask, wildcard mask, .
Check DNS propagation for any domain by querying A, AAAA, MX, CNAME, and TXT records via G.
Convert any IPv4 address between decimal, hexadecimal, binary, and integer formats instant.
Plan IP address allocation by dividing a network into subnets with custom sizes and labels.
Check if an IP address is listed on major DNS blacklists (DNSBLs) and view basic IP reputa.
Look up the approximate geographic location of any IP address and view it on an interactiv.
Free IP address lookup tool. Enter any IPv4 address to see its location, ISP, ASN, timezon.
Free IP range calculator. Enter an IP address and CIDR prefix to instantly find the networ.
IP to Binary Converter.
Convert IPv4 addresses to IPv6 mapped, compatible, and 6to4 formats instantly.
Calculate IPv6 subnets from any prefix. Get network range, first and last address, and tot.
Searchable reference of IPv4 multicast address ranges (224.0.0.0 - 239.255.255.255) with I.
Identify the IP address class (A, B, C, D, E), whether it is private or public, loopback, .
Free network prefix calculator. Perform bitwise AND on an IP address and subnet mask to de.
Comprehensive reference of all private, reserved, and special-purpose IPv4 address ranges .
Perform reverse DNS (PTR) lookups to find the hostname associated with any IP address.
Free online same subnet checker. Enter two IP addresses and a subnet mask or CIDR to insta.
Free online subnet calculator. Calculate network address, broadcast, usable host range, an.
Complete IPv4 subnet reference table from /0 to /32 with subnet mask, wildcard mask, usabl.
Aggregate multiple subnets into a single supernet (route summary). Enter 2-8 networks and .
Calculate Variable Length Subnet Mask (VLSM) allocations. Enter a parent network and requi.
Resolve any domain name to its IPv4 and IPv6 addresses. Look up A and AAAA DNS records for.
Convert subnet masks to wildcard masks and vice versa. See CIDR prefix, binary representat.
Check if your connection supports both IPv4 and IPv6. Test dual-stack connectivity by fetc.
Validate IPv6 addresses, expand compressed notation, and identify address types including .
Free online IPv6 converter tool. Expand compressed IPv6 addresses to full form, compress f.
Generate EUI-64 interface identifiers from MAC addresses. Insert FFFE, flip the 7th bit, a.
Generate fe80:: link-local IPv6 addresses from MAC addresses using the EUI-64 method.
Searchable reference of IPv6 multicast scopes and well-known addresses in the ff00::/8 ran.
Calculate IPv6 prefix delegation splits. See how a /48 or /56 divides into /64 subnets for.
Calculate 6to4 tunnel IPv6 addresses from your IPv4 address. Generate 2002: prefix address.
Calculate the impact of WiFi channel width on throughput, interference, and available chan.
Fix NAT type issues on PS5, Xbox, and Nintendo Switch with step-by-step instructions and r.
Identify your NAT type (Open, Moderate, Strict) and learn how it affects gaming, VoIP, and.
Generate strong, random WiFi passwords with customizable length and character types.
Calculate optimal QoS settings for your network. Add devices and activities to generate re.
Calculate the optimal position for your wireless router based on room dimensions, wall cou.
Free WiFi signal strength converter. Convert dBm values to signal quality percentage, get .
WiFi Name Generator.
Free WiFi channel analyzer. Select your frequency band and current channel to instantly se.
Estimate your WiFi coverage radius and signal zones based on router type, frequency band, .
Answer a few questions about your devices and environment to get a personalized 2.4GHz, 5G.
Check your WiFi password strength instantly. See entropy bits, WPA2/WPA3 compliance, estim.
Estimate how WiFi speed degrades over distance, through walls, and across frequency bands.
Compare all WiFi standards from 802.11a to 802.11be (WiFi 7). Filter by generation, band, .
Calculate antenna gain, EIRP, and effective radiated power for wireless links. Reference t.
Estimate Bluetooth range by class, version, and environment. Reference table of Bluetooth .
Calculate free space path loss (FSPL) for wireless links using the Friis equation. Input d.
Calculate Fresnel zone radius at the midpoint and any point along a wireless link path. Es.
Calculate a complete wireless link budget including Tx power, antenna gains, cable losses,.
Calculate wireless bridge feasibility. Input distance, frequency, antenna gains, and Tx po.
Bandwidth Calculator.
Calculate bandwidth requirements for GeForce NOW, Xbox Cloud Gaming, and Amazon Luna at va.
Check latency to AWS, Azure, and Google Cloud regions from your browser. Find the fastest .
Free file transfer time calculator. Enter a file size and connection speed to instantly ca.
Measure latency to common game server regions. Test ping times to find the fastest server .
Measure your network latency for gaming with real-time RTT checks to popular game server r.
Compare your ISP plan speed vs actual measured speed. Calculate if you're getting what you.
Estimate network jitter and its impact on VoIP, gaming, and streaming quality from latency.
Calculate optimal MTU and MSS values for Ethernet, PPPoE, VPN, and other connection types .
Calculate annual network downtime, cost of outages, and compare SLA tiers from 99% to 99.9.
Network Latency Test — Ping & Latency Reference.
Convert between network speed units: bps, Kbps, Mbps, Gbps, Bps, KBps, MBps, GBps with rea.
Calculate actual network throughput and goodput from link speed after accounting for proto.
Free browser-based ping test tool. Measure HTTP response times, latency, jitter, and netwo.
Calculate bandwidth and storage requirements for IP security cameras based on resolution, .
Calculate exactly how much bandwidth you need for streaming Netflix, YouTube, Disney+, and.
Calculate bandwidth requirements for Zoom, Teams, Google Meet, and WebEx video conferences.
Calculate VoIP Mean Opinion Score (MOS) from latency, jitter, and packet loss. Determine c.
Understand CORS, build cross-origin policies, and test configurations with an interactive .
Search known router vulnerabilities by brand, model, or CVE ID. Includes severity ratings,.
See what your browser reveals about you. Check user agent, screen resolution, timezone, We.
Generate firewall rules for iptables, UFW, and Windows Firewall. Configure direction, prot.
Check and learn about HTTP security headers including CSP, HSTS, X-Frame-Options, and more.
Check any IP address for abuse history, geolocation, ISP details, and risk assessment with.
Detect and fix mixed content issues on HTTPS websites. Interactive educational tool with e.
Free online port scanner to check which ports are open on your public IP address. Scan com.
Calculate password entropy, estimate crack times at various attack speeds, and visualize p.
Look up default usernames, passwords, and login IPs for 60+ router brands and models insta.
Free SSL certificate checker. Verify SSL/TLS certificate details, expiration dates, issuer.
Free VPN leak test tool. Detect WebRTC leaks, DNS leaks, and IPv6 leaks that may expose yo.
Look up domain registration details including registrar, creation date, expiry, and namese.
Compare 15+ dynamic DNS providers side by side. Filter by free plans, features, protocols,.
Check DKIM records for any domain and selector. Validate DKIM signing configuration and tr.
Check and analyze DMARC records for any domain. Parse DMARC policies, understand enforceme.
DNS Lookup — DNS Record Types Reference.
Test DNS over HTTPS (DoH) endpoints from multiple providers. Compare Google, Cloudflare, Q.
Benchmark and compare DNS resolver response times from your browser. Test Google DNS, Clou.
Check MX records for any domain to see mail server priorities and validate email delivery .
Analyze HTTP redirect chains and status codes. Understand 301, 302, 307, and 308 redirects.
Validate robots.txt syntax, parse directives, and check for common errors. Ensure search e.
Check and validate SPF records for any domain. Parse SPF mechanisms, detect errors, and im.
Calculate and convert DNS TTL values. Convert seconds to human-readable format and underst.
Interactive ARP protocol simulator. Understand ARP requests, replies, and table entries wi.
Look up BGP Autonomous System Numbers for major networks including Google, Cloudflare, AWS.
Searchable reference of 80+ common network ports with service names, protocols, descriptio.
Calculate DHCP pool size, maximum clients, lease renewal timing, and IP address utilizatio.
Searchable reference of all 64 DSCP values with PHB names, binary notation, decimal values.
Find required ports for 20+ popular games and consoles. Select your game to get port forwa.
Generate SNAT, DNAT, and masquerade rules for iptables, nftables, and Cisco IOS NAT config.
Compare TCP, UDP, ICMP, and SCTP protocols side by side with filterable tables showing use.
Calculate OSPF interface cost from reference bandwidth and interface speed. Compare costs .
Port Checker — Common Network Ports Reference.
Generate port forwarding configurations for popular routers including TP-Link, Netgear, As.
Test if your port forwarding rules are working correctly with an interactive checklist and.
Free port lookup tool. Enter any port number or service name to instantly see its protocol.
Plan and assign VLAN IDs for network segmentation. Generate VLAN configurations for depart.
Free Ethernet cable length calculator. Check if your Cat5e, Cat6, Cat6a, Cat7, or fiber ca.
Free default gateway finder tool. Get exact step-by-step commands to find your default gat.
Compare Cat5e, Cat6, Cat6a, Cat7, and Cat8 Ethernet cables side by side. Filter by speed, .
Compare fiber optic and copper Ethernet cables across speed, distance, cost, installation,.
Generate random MAC addresses with options for unicast/multicast and locally/universally a.
Free tool to identify the manufacturer of any network device by its MAC address using the .
Plan your network switch port requirements. Add devices by type, calculate total ports nee.
Calculate Power over Ethernet budget for your network. Add devices, select PoE switch stan.
Router IP Finder by Brand.
Count your IoT and smart home devices, estimate total bandwidth usage, and get recommended.
Calculate UPS battery runtime based on VA rating, load wattage, and efficiency. Plan backu.
Parse and analyze user agent strings. Auto-detect your browser, OS, device type, and rende.
Generate Wake-on-LAN magic packets from any MAC address. View the full hex payload and cop.
Free online converter between binary, decimal, hexadecimal, and octal number systems. Real.
Free converter between bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and networ.
Calculate cloud egress and data transfer costs for AWS, Azure, GCP, and generic providers .
Free online data usage calculator. Estimate your monthly internet data consumption based o.
Convert between dB and dBm, calculate milliwatt equivalents, and reference common WiFi sig.
Free Ethernet frame size calculator. Calculate total frame size including preamble, header.
Calculate network packet sizes including Ethernet, IP, TCP, and UDP headers. See total fra.
Free TCP window size and bandwidth-delay product calculator. Calculate maximum TCP through.
Estimate the number of network hops from a received TTL value. Detect the likely starting .
Find the default login URL, IP address, username, and password for 50+ router brands insta.
Calculate DMZ configuration for your router. Enter your network details to generate the co.
Plan your smart home bandwidth needs. Add IoT devices to calculate total bandwidth usage a.
Calculate how many mesh WiFi nodes you need based on square footage, floors, wall types, a.
Calculate the total cost of your home or small office network equipment. Add routers, swit.
Interactive comparison of port triggering vs port forwarding. Understand when to use each,.
Compare major router brands side by side. Filter by WiFi standard, price range, target aud.
Check your router firmware version and find the manufacturer update page. Select your bran.
Paste your router log entries and get instant analysis. Identifies warnings, errors, login.
Interactive guide to rebooting your router with a built-in 30-second power cycle timer. Se.
Check if your email server IP or domain appears on major email blacklists. Look up MX reco.
Interactive email deliverability checklist and scoring tool. Verify SPF, DKIM, DMARC, rDNS.
Parse and analyze email headers to trace routing hops, identify delays, and verify SPF/DKI.
Trace the sender IP address from email headers and look up its geographic location, ISP, a.
Look up PTR (reverse DNS) records for any IP address. Verify that your mail server has pro.
Interactive SMTP command simulator and reference. Learn the SMTP handshake sequence and tr.
Compare CDN performance by measuring response times to Cloudflare, Google, AWS CloudFront,.
Searchable reference of all HTTP status codes (1xx-5xx) with descriptions, common causes, .
Analyze your current page's load performance using Navigation Timing and Resource Timing A.
Calculate allowed downtime from uptime SLA percentages. Compare 99.9%, 99.99%, and 99.999%.
Measure website response time including DNS lookup, TCP connection, and Time to First Byte.
Identify website technologies by checking for common framework signatures, meta tags, head.
Interactive security checklist for IoT devices. Score your smart home security by checking.
Track firmware versions for your IoT devices. Add devices with current versions, check dat.
Interactive guide for setting up VLAN segmentation to isolate IoT devices from your main n.
Compare Matter, Thread, WiFi, Bluetooth, Zigbee, and Z-Wave smart home protocols with spec.
Plan network subnets for your smart home. Assign device categories to VLANs and generate a.
Network requirements for Alexa, Google Home, HomePod, and other smart speakers. Bandwidth,.
Compare Zigbee, Z-Wave, WiFi, Thread, and Bluetooth smart home protocols side by side with.
Estimate Discord voice chat quality based on your latency, jitter, and packet loss metrics.
Calculate recommended bitrate for Twitch and YouTube streaming based on resolution, FPS, a.
Calculate cloud data transfer costs for AWS, Azure, and GCP based on monthly data volume w.
Plan VPN split tunneling by assigning apps and domains to VPN or direct routing. Generate .
Compare VPN protocols side by side — WireGuard, OpenVPN, IPsec, IKEv2, L2TP, PPTP, and SST.
Detailed comparison of VPN protocols with visual radar charts for speed, security, ease, a.
Estimate VPN latency based on server location distance. Select server regions to compare e.
Calculate estimated VPN speeds based on your base connection speed, VPN protocol, and encr.
Generate WireGuard VPN configuration files. Input interface details and peers to create [I.
Build access control list rules for Cisco IOS and Linux iptables. Generate permit/deny rul.
Calculate the impact of ISP throttling or QoS bandwidth limits on your internet speed and .
Detect and resolve IP address conflicts on your network. Interactive checklist, ARP scan c.
Generate formatted network change log entries. Document configuration changes, firmware up.
Create and manage a network device inventory. Add devices with name, type, IP, MAC, locati.
Calculate SLA uptime metrics, allowed downtime per year/month/week, and service credit pen.
NTP server reference with public server list, stratum levels, and configuration guides for.
Interactive RADIUS authentication reference with flow diagrams, attribute tables, and conf.
Search and browse 40+ common SNMP OIDs with name, type, description, and MIB references fo.
Interactive syslog severity levels 0-7 reference with color coding, examples, facility cod.
Interactive T568A and T568B wiring standard reference. Click to toggle between standards a.
Comprehensive reference of all WiFi standards from 802.11a to 802.11be (WiFi 7). Compare s.
Searchable glossary of 100+ networking acronyms with definitions. Real-time filter to quic.
Searchable reference of common network error codes with causes and fixes. Look up DNS_PROB.
Interactive OSI model reference with clickable 7-layer diagram. Explore protocols, PDUs, d.
Search and browse 50+ important networking RFCs with summaries, categories, and direct lin.
Interactive TCP/IP 4-layer model reference with protocols per layer. Compare TCP/IP to OSI.
Calculate how many wireless access points you need based on square footage, building type,.
Generate ASCII network diagrams for your home or small office network. Add devices, connec.
Interactive step-by-step network troubleshooting wizard. Diagnose WiFi, internet, and conn.
Generate formatted change request documents for network modifications. Fill in details and.
Interactive incident response checklist covering detection, containment, eradication, and .
Interactive network audit checklist with security, performance, and documentation categori.
Generate ASCII network topology diagrams. Add devices and connections to create text-based.
Generate network policy documents for acceptable use, BYOD, VPN, and wireless access. Fill.
Interactive PCI-DSS network requirement checklist with pass/fail scoring for payment card .
Convert IOPS to bandwidth (MB/s and Gbps) based on block size. Calculate storage throughpu.
Calculate total power consumption and annual electricity cost for your network equipment.
Calculate server rack space requirements. Add equipment with U-heights and check if it fit.
Calculate BTU cooling requirements for server rooms based on total equipment wattage and r.
Searchable reference of SFP, SFP+, and QSFP module types with speed, distance, fiber type,.
Yes. Every tool is completely free with no account required. They run in your browser using JavaScript, so your data stays on your device.
No. All tools work directly in any modern web browser on desktop and mobile. Nothing to download or install.
Use our Default Gateway Finder. On most home networks, your router is at 192.168.1.1 or 10.0.0.1.
Use the Speed Test for download/upload and latency. The Ping Test measures round-trip time to specific servers.
Yes. All tools are fully responsive and work on iPhone and Android browsers.
Use the WiFi Channel Finder, Router Placement Optimizer, and WiFi Coverage Estimator.
Yes! Gaming Port Forwarding Guide, Console NAT Type Fixer, Game Server Ping Tester, and more.
Yes. VLSM Calculator, OSPF Cost Calculator, BGP ASN Lookup, ACL Rule Builder, and more.
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