Dev Tools
37 free tools for developers — encoding, networking, color, formatting, and more — built by StrawHatDevs.
DNS & Domain
Dig into DNS records, WHOIS data, and email securityDNS Lookup
Query A, AAAA, CNAME, MX, TXT, NS, SOA records for any domain
Reverse DNS
Resolve an IP address back to its hostname (PTR record)
WHOIS Lookup
Get domain registration, expiry, registrar, and nameserver details
MX Lookup
List mail exchange records with priority for a domain
DNS Propagation
Check DNS record propagation across multiple global resolvers
SPF Checker
Parse and validate SPF records to prevent email spoofing
DKIM Checker
Verify DKIM public key records for a domain and selector
DMARC Checker
Parse and validate DMARC policy for a domain
Network
Diagnose connectivity, latency, and routingPing
Measure TCP round-trip latency to any host or IP address
Traceroute
Trace the network path and latency to a destination hop by hop
Port Checker
Test if TCP ports are open or closed on any host
IP Geolocation
Locate any IP address with city, country, ISP, and coordinates
ASN Lookup
Look up Autonomous System Number details for an IP or ASN
HTTP & Web
Inspect HTTP responses, headers, and redirectsSecurity
Audit SSL certificates and domain security postureCalculators
Calculate CIDR ranges and subnet configurationsDiscovery
Understand your own network infrastructureEncoding & Decoding
Encode, decode, and generate secrets, Base64, JWT, URL, and moreBase64 Encoder / Decoder
Encode text or binary data to Base64, or decode Base64 strings back to plain text
URL Encoder / Decoder
Encode special characters in URLs and query strings, or decode percent-encoded URIs
JWT Decoder
Decode and inspect JWT header, payload, claims, and expiry — no secret required
HTML Entity Encoder
Encode HTML special characters (&, <, >, ", ') to entities or decode them back
Secret Generator
Generate cryptographically secure secrets — API keys, passwords, UUIDs, hex tokens, and JWT secrets
Text Utilities
Hash, diff, count, generate, and test text with regexHash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes of any text string
Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or word count
Text Diff Viewer
Side-by-side diff of two text blocks with added, removed, and unchanged line highlighting
Regex Tester
Test regular expressions against sample text with real-time match highlighting and group capture
Word & Char Counter
Count words, characters, sentences, paragraphs, and estimated reading time
Color Tools
Convert color formats and check WCAG contrast ratiosTime & Date
Convert timestamps, parse cron expressions, and translate time zonesUnix Timestamp
Convert Unix timestamps to human-readable dates and vice versa across any timezone
Cron Expression Parser
Parse and explain cron expressions in plain English with the next 5 scheduled run times
Timezone Converter
Convert a date and time across multiple global time zones simultaneously