mstrhakr tools
all the random tools you keep googling, in one place
Data Size Converter
Convert between bits, bytes, KB, MB, GB, TB and network units
converterDownload Time Calculator
Estimate file download time based on size and connection speed
converterUnix Timestamp Converter
Convert between Unix timestamps and human-readable dates
converterColor Picker
Pick colors and convert between Hex, RGB, and HSL formats
encodingBase64 Encode / Decode
Encode and decode Base64 strings with UTF-8 support
encodingURL Encode / Decode
Encode and decode URL components
encodingJSON Formatter
Format, minify, and validate JSON with syntax highlighting
textText Counter
Count characters, words, sentences, paragraphs and reading time
mathCalculator
Basic calculator with keyboard support
mathPercentage Calculator
Calculate percentages, percentage of, and percent change
generatorPassword Generator
Generate secure random passwords with configurable options
generatorUUID Generator
Generate v4 UUIDs individually or in bulk
networkSubnet Calculator
Calculate network address, broadcast, range and subnet details from CIDR
networkIP Address Info
Look up your public IP address and basic info
networkMAC Address Lookup
Identify the manufacturer from a MAC address OUI prefix
networkDNS Lookup
Query DNS records via DNS-over-HTTPS. Includes SPF, DMARC, and DKIM email security checker.
networkPing
TCP reachability check and latency measurement from the backend server
networkSSL Cert Checker
Inspect TLS certificates, expiry date, issuer, SANs and cipher suite
networkHTTP Headers Inspector
Fetch and inspect HTTP response headers with security header analysis
networkPort Scanner
Check common ports on a host via TCP connect scan
securityHash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes via WebCrypto
securityJWT Decoder
Decode and inspect JSON Web Tokens — header, payload, claims, and expiry
devRegex Tester
Test regular expressions with live match highlighting and group capture display
devChmod Calculator
Toggle read/write/execute bits and get octal permission values
devCron Parser
Parse and explain cron expressions in plain English