Free Network & Connectivity Tools
Useful tools for network analysis and web development. Parse and analyze URLs to understand their components, look up IP addresses to find location and ISP information. Essential utilities for developers and network administrators.
All Network Tools
URL Parser
Break down a URL into its components
IP Address Lookup
Fetch detailed information about an IP address
DNS Record Explainer
Explain DNS record types with examples and formats
URL Encoder / Decoder
Encode or decode URL components safely
Base64 Encoder / Decoder
Convert text to Base64 or decode Base64 strings
JWT Header Inspector
Inspect JWT headers without verification
HTTP Status Code Lookup
Look up HTTP status meanings and causes
HTTP User-Agent Analyzer
Analyze browser, OS, and device from a user-agent
IPv4 Subnet Calculator
Calculate subnet details from IPv4 and CIDR
CIDR to Netmask Converter
Convert CIDR notation to netmask and back
MAC Address Generator & Validator
Validate MAC formats and generate random MACs
Port Number Lookup
Find service names for common ports
Overview
Network troubleshooting often requires quick visibility into URLs, headers, IPs, and DNS concepts. This catalog provides a lightweight toolkit for parsing, decoding, and calculating common networking data without leaving your browser. Use it to accelerate diagnostics and documentation.
Network troubleshooting is detail-heavy
Network and web issues are often caused by small misconfigurations: a malformed URL, a wrong subnet, or a misinterpreted status code. Quick visibility prevents lengthy debugging cycles.
Developers and operators regularly need to decode encoded data, inspect headers, and understand DNS records. Without simple utilities, these checks become manual and error-prone.
Some diagnostics involve sensitive infrastructure details. Client-side tools help keep investigation data local and private.
Catalog Breakdown
URL and encoding utilities
Parse and decode URLs and common encodings.
- Break down URL components
- Encode or decode parameters
- Convert Base64 strings
IP and subnet analysis
Interpret IP details and calculate subnets quickly.
- Lookup IP address context
- Calculate subnet ranges
- Convert CIDR to netmask
Protocol and standards reference
Understand status codes, ports, and DNS records.
- Check HTTP status meanings
- Identify common port usage
- Understand DNS record types
Header and identity inspection
Inspect user agents and token headers safely.
- Parse user-agent strings
- Inspect JWT headers
- Validate MAC addresses
How to Use These Tools
Identify the network artifact
Choose whether you are analyzing a URL, IP, subnet, or encoding.
Paste the value
Insert the URL, token, or IP address into the relevant tool.
Review parsed output
Use the structured result to locate anomalies or misconfigurations.
Cross-check standards
Verify port numbers or HTTP status meanings when documenting.
Export or copy findings
Share the results with teammates or include in incident notes.
Validate against production
Confirm with real system logs or configs before acting.
Use Cases
Web debugging
Parse URLs and decode parameters during troubleshooting.
Security investigations
Inspect JWT headers or MAC address formats.
Network planning
Calculate subnets and netmasks for infrastructure changes.
Support documentation
Reference status codes and port numbers quickly.
Analytics validation
Decode Base64 and URL parameters from tracking.
QA testing
Verify user-agent strings across devices.
Professional Applications
DevOps
Troubleshoot connectivity and configure infrastructure.
Security engineering
Inspect tokens and validate addressing formats.
Backend engineering
Decode parameters and validate status codes.
IT support
Quickly identify issues in URLs and network settings.
Technical writing
Document protocols and error meanings accurately.
Best Practices
- Double-check inputs before making infrastructure changes.
- Use decoded values as references, not authoritative sources.
- Document HTTP status interpretations in incident reports.
- Treat geolocation results as approximate.
- Keep internal IPs and tokens private.
- Confirm subnet calculations with network diagrams.
- Use URL encoding tools before deploying tracking links.
FAQs
Is IP lookup exact?
IP geolocation is approximate and usually accurate at the city or region level.
Can I look up private IPs?
Private IPs cannot be geolocated and will show limited results.
Are decoded values stored?
No. Everything runs locally in your browser.
Do these tools require internet access?
Some lookups may rely on public data, but parsing works offline.
How accurate are subnet calculations?
They follow standard CIDR and IPv4 rules.
Is Base64 decoding safe?
Yes, but ensure the decoded content is trusted before use.
Can I validate a MAC address format?
Yes. The validator checks standard formats.
Do you log any network data?
No. We do not store or transmit input values.