Free utilities
Free VoIP & SIP security tools
Browser-based utilities for VoIP engineers and sysadmins. Generate Fail2Ban filters, calculate bandwidth, parse SIP traces, create secure extension passwords, and validate trunk URIs — no signup, no server uploads.
Tool directory
12 free tools for VoIP security
Nine engineering utilities plus our live threat feed, IP reputation lookup, and remote PBX scanner. All tools run client-side — your data never leaves the browser except TLS certificate probes.
- New
Fail2Ban Regex Generator
Auto-generate Fail2Ban filters from SIP log lines
Open tool → - New
VoIP Bandwidth Calculator
Concurrent calls to Kbps/Mbps with codec overhead
Open tool → - New
SIP Trace Parser
Format SIP messages and flag security issues
Open tool → - New
PBX Password Generator
Secure SIP secrets with batch CSV export
Open tool → - New
SIP URI Validator
Validate SIP URIs and preview DNS routing
Open tool → - New
PDD Calculator
Simulate post-dial delay across routing hops
Open tool → - New
SIP TLS Checker
Deep TLS certificate check for SIP endpoints
Open tool → - New
WebRTC SIP Tester
Live WSS REGISTER test with SIP.js
Open tool → - New
SIP Error Translator
Interactive SIP error troubleshooting guide
Open tool → SIP IP Lookup
VoIP reputation check against honeypot data
Open tool →PBX Security Scanner
Remote PBX security audit
Open tool →Live Threat Feed
Real-time honeypot attack dashboard
Open tool →
Built for Asterisk, Kamailio, FreePBX, and 3CX
Whether you are sizing WAN bandwidth for a call center, writing Fail2Ban filters for Asterisk registration brute-force, or triaging a suspicious SIP INVITE from sngrep output — these tools solve the daily tasks VoIP engineers face. They complement SipRadar's paid platform: real-time honeypot threat intelligence, automated PBX audits, and API-driven SIP blacklist feeds that block toll-fraud infrastructure before it reaches your trunks.
Every tool is optimized for search and ships with detailed FAQ sections covering Asterisk fail2ban filter generation, G.729 vs G.711 bandwidth comparison, SIP trace analysis, secure password provisioning, and SIP URI validation for trunk setup.
FAQ
Tools FAQ
Questions about our free VoIP utilities and how they connect to SipRadar's threat intelligence platform.
Contact support →Yes. All tools on this page are free, run in your browser, and require no account. Your input data is processed locally and never sent to our servers.
Beyond free tools
Automate SIP defense with real-time honeypot intelligence.
Community tier is free. Pull the global SIP blacklist, run PBX audits, and block known attackers before they hit your iptables.