Technology & Computing
Tools for developers, IT professionals, and tech-savvy users.
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Password Strength Calculator
Check how strong your password could be based on length and character types. See estimated time to crack.
Binary/Hex/Decimal Converter
Convert between binary, octal, decimal, and hexadecimal number systems. Includes bit count, byte size, and ASCII character lookup.
Download Time Calculator
Calculate how long it takes to download a file at various internet speeds. Compare download times across different connection speeds.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats. Enter RGB values and get all other representations instantly.
Subnet Calculator
Calculate subnet mask, network address, broadcast address, usable host range, and CIDR notation for any IP address.
Screen PPI Calculator
Calculate pixels per inch (PPI), dot pitch, aspect ratio, and physical dimensions of any display.
Hash Properties Calculator
Compare cryptographic hash function properties. See output size, collision resistance, brute force time, and security status for MD5, SHA-1, SHA-256, SHA-512, and bcrypt.
JSON Size Calculator
Estimate JSON payload size based on key count, value lengths, nesting depth, and array size. See minified and gzipped estimates.
Regex Tester
Test regular expressions against sample text. See matches in real-time, validate patterns, and debug regex issues.
Bandwidth Calculator
Calculate download and upload times based on file size and connection speed. Estimate transfer times for large files.
IP Subnet Calculator
Calculate IP subnet information including subnet mask, hosts per subnet, and network configuration.
File Size Converter
Convert file sizes between bytes, KB, MB, GB, and TB. Understand file size in different units.
Number Converter Suite
Convert binary, hex, decimal, colors, ASCII, and signed integers.
Security Tools Calculator
Password strength analysis, crack time estimation, and hash algorithm comparison.
Network Tools Calculator
Subnet calculator, bandwidth estimator, and VLSM network planning.
Developer Tools Calculator
Download times, file sizes, screen PPI, and data encoding calculations.
QR Data Capacity
Approximate max data bytes for QR version 1–10 by error correction level (byte mode, ISO 18004 table).
UPC Check Digit
UPC-A check digit from the first 11 digits (positions 1–11, left to right).