Tools
80 free browser-based tools. No sign-up. Everything runs locally where possible.
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Live
Live · Interactive
Live World Intelligence Map
Seven real-time data layers: earthquakes (USGS), flights (ADS-B), natural events (NASA EONET), cyber threat origins, shipping lanes, ISS live position and 60 film locations. Toggle any layer. Full-screen mode. Event log.
EarthquakesFlightsISSWildfiresFilm Locations
AI-Powered Tools
AI Network Config Generator
Plain English to working Cisco IOS, IOS-XR, Juniper or Palo Alto configuration. BGP, OSPF, VLAN, ACL, VPN.
AI
AI Network Troubleshooter
Describe a symptom. Get a structured diagnostic flowchart with CLI commands per step. Click steps to mark done.
AI Network Log Analyzer
Paste Cisco, Juniper, Palo Alto or syslog output. Get root cause analysis, remediation CLI and parsed events.
AI
CCNA Flashcard Generator
Enter any networking topic and get 10 interactive exam-quality flip cards. OSPF, BGP, STP, EIGRP, IPv6.
AI
AI Text Tone Analyzer
Paste any text. Get tone, register, audience fit, AI vs human probability and one specific thing to improve.
AI
Stoic Oracle
Describe what you're dealing with. Choose Marcus Aurelius, Epictetus or Seneca. Receive counsel through their actual teachings.
AI
AI Cocktail Inventor
Tell it what spirits you have, what flavor, what mood. Gets you a named cocktail recipe with invented backstory.
AI
AI Recipe Generator
List what's in your fridge. Pick cuisine, diet, time. Get a full recipe with ingredients and method.
Interactive Stoic Node Graph
Explore Stoic philosophy as an interactive knowledge graph. Navigate ideas, thinkers, and connections visually.
AI System Memory Profiler
Profile AI model memory requirements. Calculate VRAM needs for different model sizes, quantizations and batch sizes.
Midjourney Prompt Builder
Build optimized Midjourney prompts with all parameters — aspect ratio, stylize, chaos, version, raw mode.
AI
IP Intelligence Lookup
Geolocation, ISP, ASN, timezone, proxy/VPN/hosting flags and AI threat context for any IP address.
AI
What Kind of Nomad Are You?
10 questions. AI recommends your ideal DN city based on budget, lifestyle, work style and priorities.
AI
DN Visa Document Checklist
Pick your nationality and country. Get a personalised document list with tips per item. Progress saves locally.
LLM Token Counter
Count tokens for Claude, GPT-4, Llama and Gemini. Context window usage and cost estimates per model.
Cosine Similarity Calculator
Calculate cosine similarity between two vectors or text strings. Useful for understanding embedding distances.
AI
Subnet & CIDR Calculator (AI)
Same math as above but with an AI explanation of what this subnet is typically used for.
MX Record Lookup
Look up mail server records for any domain. See all MX entries, priority values and IP resolution.
SPF Record Checker
Validate and analyze any SPF record. See all mechanisms, detect misconfigurations and test against sending IPs.
DMARC Record Checker
Parse and validate DMARC records. Understand policy, reporting addresses and alignment configuration.
DKIM Record Checker
Verify DKIM public keys for any domain and selector. Decode RSA keys and check record syntax.
Email Blacklist Checker
Check any IP or domain against 22+ DNS blacklists simultaneously. Find out if you're blacklisted and why.
Email Header Analyzer
Paste raw email headers. Get a hop-by-hop delivery timeline, authentication results and spam score indicators.
DNS Auth Record Builder
Generate SPF, DKIM and DMARC records from scratch. Fill in your senders, policies and reporting preferences.
BGP & Routing
BGP Path Selection Visualizer
Step through all 13 BGP best-path attributes interactively. Configure each and see which path wins and why.
BGP Community Builder & Decoder
Build and decode standard, extended and large BGP communities. Well-known communities with IOS config output.
Interactive BGP Path Visualizer
Draw BGP topologies visually, set attributes and animate best-path selection across multiple routers.
BGP Route Leak & Hijack Simulator
Simulate BGP route leaks and prefix hijacks. Understand how hijacks propagate and what mitigations stop them.
BGP AS-Path Prepend Calculator
Calculate the effect of AS-path prepending on route selection. See how many prepends change inbound traffic paths.
BGP & OSPF Config Generator
Fill in parameters and generate boilerplate BGP or OSPF configuration for Cisco IOS.
IP & Subnetting
IPv4 Subnet Calculator
Calculate network address, broadcast, host range, mask and wildcard. Binary breakdown included.
Visual Subnet & VLSM Builder
Draw your IP scheme visually. Allocate subnets of different sizes and see the whole block at once.
VLSM Calculator
Variable Length Subnet Masking. Allocate subnets of different sizes from a single address block efficiently.
Subnetting Speed Drill
Timed CCNA-style subnetting drill. Get faster at calculating network, broadcast and hosts under exam conditions.
IPv6 Subnet Calculator
Expand, compress, find network address and classify any IPv6 prefix. Binary breakdown. Address type reference table.
IPv6 EUI-64 Generator
Generate the EUI-64 interface ID from any MAC address. Shows exactly how the 48-bit MAC becomes 64 bits.
IPv6 Migration & Dual-Stack Translator
Translate between IPv4 and IPv6 representations. NAT64, 6to4, ISATAP and mapped address formats.
MTU & Fragmentation Calculator
Select interface MTU and encapsulation overheads. See usable payload, fragmentation risk and MSS clamp value.
Tunnel MTU & IPsec Overhead Calculator
Calculate effective MTU for GRE, IPsec, VXLAN, MPLS and L2TP tunnels stacked in any combination.
MAC Address / OUI Lookup
Look up the manufacturer and vendor for any MAC address or OUI prefix. Supports XX:XX:XX and XXXXXX formats.
Security & Firewall
ACL Builder
Build Cisco standard and extended ACLs visually. Add rules, set permit/deny and generate CLI config.
ACL & Firewall Rule Optimizer
Paste an ACL and get suggestions to remove redundant rules, reorder for performance and fix shadowed entries.
IPsec Phase 1 & 2 Config Generator
Select your IKE version, encryption, hashing and DH group. Generate matching Phase 1 and Phase 2 configs.
IPsec/IKEv2 Phase Step-Through
Animate the IKEv2 negotiation process step by step. See exactly what is exchanged in each message.
Cisco Password Hasher
Generate Cisco type 5 (MD5) and type 7 password hashes for router and switch configurations.
Analysis & Diagnostics
Cisco CLI Cheatsheet
180+ commands across 10 categories — BGP, OSPF, NAT, ACL, VLANs, hardening, troubleshooting. Click to copy.
Config Diff Tool
Paste two config versions (before/after). See exactly what changed, line by line, color-coded.
tcpdump Filter Builder
Build tcpdump BPF filters visually. Select protocol, port, host, flags and get the exact command.
Regex Tester
Test regex patterns against network automation output. Pre-loaded with common network patterns for Python/Ansible.
VLAN Planner
Plan your VLAN layout visually. Assign subnets, name segments, generate switch port configs.
Fiber Loss Budget Calculator
Calculate fiber optic link loss budget. Enter fiber length, connector count and splices. Get power budget margin.
Network Traffic Flow Visualizer
WebGPU-powered traffic flow animation. Visualize packet flows through a network topology in real time.
3D Network Topology Simulator
Build and animate a network topology in 3D. Add routers, switches and links. Simulate failover scenarios.
QoS & Bandwidth Calculator
Calculate queue sizes, DSCP markings, shaping rates and bandwidth allocation for QoS policies.
Troubleshooting Checklist
Structured checklists for BGP, OSPF, EIGRP and L2 issues. Check off steps as you diagnose.
Ping & Traceroute Simulator
Simulate ping and traceroute output for CCNA study. Understand TTL, ICMP types and hop-by-hop responses.
Cisco Certification Roadmap
Interactive Cisco cert pathway. Prerequisites, exam codes and study resources for each level from CCNA to CCIE.
Photography
Exposure Triangle
Interactive exposure triangle showing the relationship between aperture, shutter speed and ISO.
Depth of Field Calculator
Near limit, far limit and total DoF for any camera, lens, aperture and focus distance combination.
Golden Hour Calculator
Calculate sunrise, sunset, golden hour and blue hour for any location and date. Plan outdoor shoots.
ND Filter Calculator
Calculate the correct shutter speed when adding ND filters. Stop-based exposure compensation with fractional stops.
Lens & Focal Length Simulator
Preview bokeh and depth of field visually for different focal lengths and apertures. Compare lenses side by side.
Field of View Calculator
Calculate field of view, angle of view and equivalent focal length for any sensor size and lens combination.
Shot List Builder
Build a professional shot list for any shoot. Export to PDF or share with your team.
EXIF Viewer & Stripper
View all metadata from any image. Strip EXIF data to protect your privacy before sharing photos online.
Aspect Ratio & Crop Calculator
Calculate cropped dimensions for any aspect ratio. Useful for social media formats, prints and video.
3D Photo Gallery
View photos in an interactive 3D gallery environment. Upload your own images and walk through them.
Digital Nomad
DN City Comparator
Compare any two of 15 digital nomad cities side by side — rent, internet, food, safety, visa type and DN score.
Nomad Currency Converter
Real-time exchange rates for all 10 DN destination currencies. USD, EUR, COP, MXN, THB, PYG and more.
DN Country Matchmaker
Answer lifestyle questions and get matched to your ideal digital nomad country with a detailed breakdown.
World Clock & Meeting Planner
See the current time across all your team's locations. Find the best meeting time without timezone confusion.
Food & Cooking
Pizza Dough Calculator
Calculate flour, water, yeast and salt for any number of pizzas. Hydration percentage and timing included.
Baker's Percentage Calculator
Professional baker's percentage tool. Scale any recipe up or down by weight. Works for bread, pastry and cakes.
Dev & Utilities
JSON & YAML Formatter
Format, validate and convert between JSON and YAML. Minify, sort keys. Runs entirely locally.
QR Code Generator
Generate QR codes for any URL, text or contact. Customize size and download as PNG.
Base64 & Encoder/Decoder
Encode and decode Base64, URL encoding, HTML entities and hex. All local, nothing sent anywhere.
Your Browser Fingerprint as Art
Visualize your browser's unique fingerprint as generative art. See what sites can identify about you.
3D & Creative
3D Print Cost Calculator
Calculate filament cost, time and electricity for any 3D print. Works with FDM, resin and SLA printers.
STL & OBJ 3D Viewer
Upload any STL or OBJ file and view it in the browser. Rotate, zoom, pan. No software needed.