ITCALCTOOLS.COM
// FREE IT TOOLS & CALCULATORS — 60+ TOOLS FOR TECH PROFESSIONALS
// DEVELOPER
ASCII / UNICODE LOOKUP
Char codes, Unicode & HTML entities
BASE CONVERTER
Binary, Octal, Decimal, Hex
COLOR CODE CONVERTER
HEX, RGB, HSL converter
CRON EXPRESSION HELPER
Build & explain cron schedules
CSS SPECIFICITY CALC
Calculate CSS selector weight
HTTP HEADER REFERENCE
Common HTTP headers explained
HTTP STATUS CODES
All HTTP response codes
JSON FORMATTER
Validate, prettify, minify JSON
LOREM IPSUM GENERATOR
Placeholder text generator
REGEX TESTER
Test regular expressions live
TEXT CASE CONVERTER
UPPER, lower, camelCase & more
UNIX TIMESTAMP CONVERTER
Epoch ↔ human readable date
URL ENCODER / DECODER
Encode & decode URLs
BASE64 ENCODER
Encode & decode Base64 strings
TEXT DIFF TOOL
Compare two blocks of text
HTML ENTITY ENCODER
Encode & decode HTML entities
YAML ↔ JSON CONVERTER
Convert between YAML and JSON
// HARDWARE
// NETWORKING
BANDWIDTH CALCULATOR
Required bandwidth for users
CIDR REFERENCE TABLE
All CIDR /0–/32 prefixes
DNS LOOKUP
Query 12 global DNS resolvers
DNS RECORD TYPES
A, AAAA, MX, CNAME, TXT guide
IP CLASS FINDER
Identify IP class & type
MAC ADDRESS LOOKUP
OUI vendor from MAC address
EMAIL HEALTH CHECKER
SPF, DKIM, DMARC, MX checker
PING ESTIMATOR
Latency by distance & medium
PORT NUMBER REFERENCE
TCP/UDP port lookup
NETWORK SPEED CONVERTER
bps, Kbps, Mbps, Gbps converter
SSL CERTIFICATE CHECKER
TLS validity & SSL Labs grade
SUBNET CALCULATOR
IP/CIDR full subnet breakdown
VLSM CALCULATOR
Variable Length Subnet Masking
IP GEOLOCATION
Location & ISP from IP address
IPv4 TO IPv6 CONVERTER
Convert IPv4 addresses to IPv6
WHAT IS MY IP
Your public IP, ISP & location
NETWORK ADDRESS CALC
Bulk CIDR network address calc
REVERSE DNS LOOKUP
PTR record from IP address
WHOIS LOOKUP
Domain registration & ownership
// SECURITY
CAESAR CIPHER
Encode/decode Caesar cipher
HASH GENERATOR
SHA-256, SHA-512, SHA-1 hashing
JWT DECODER
Decode & inspect JWT tokens
PASSWORD ENTROPY CALC
Bits of entropy calculator
PASSWORD GENERATOR
Cryptographically secure passwords
PASSWORD STRENGTH CHECKER
Entropy & crack time analysis
RANDOM TOKEN GENERATOR
UUID, hex token, API key gen
SSL EXPIRY CHECKER
Days until SSL cert expires
BCRYPT GENERATOR
Hash passwords with bcrypt
CSP HEADER BUILDER
Build Content Security Policy headers
TOTP / 2FA GENERATOR
Generate TOTP 2FA codes
// SERVER & CLOUD
// STORAGE
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