Developer Tools

  • CIDR to Subnet Mask Converter
    Convert a CIDR prefix (/24, /16, etc.) to a dotted-decimal subnet mask instantly. See total addresses and usable hosts for any IPv4 prefix length 0–32.
  • Base64 to Text Decoder
    Free Base64 decoder. Paste any Base64 string to instantly convert it back to plain text, with decoded byte count and padding details shown.
  • Binary to Octal Converter
    Convert any binary number (base 2) to octal (base 8) instantly. Free online binary-to-octal converter that also shows the decimal value and step grouping.
  • Unix Timestamp Calculator (Seconds & Milliseconds)
    Convert a Unix time in milliseconds to seconds, minutes and days since the epoch. Free Unix timestamp calculator with the exact floor formula explained.
  • Octal to Binary Converter
    Convert any octal (base 8) number to binary (base 2) instantly. Each octal digit maps to 3 binary bits. Free, accurate, with worked examples.
  • Chmod Calculator
    Convert Unix file permissions to chmod octal notation. Tick read, write, execute for owner, group, and other to get the 3-digit mode and symbolic string.
  • Precision and Recall Calculator
    Calculate precision, recall and F1 score from true positives, false positives and false negatives. Free classification metrics calculator.
  • PX to REM Converter
    Calculate pixel to rem conversions instantly with our free PX to REM converter. Convert any pixel value to rem units based on your root font size for responsive web design.
  • Number Base Converter
    Convert numbers between binary, octal, decimal, and hexadecimal instantly. Free online base converter with step-by-step decimal value shown.
  • IEEE 754 Floating Point Converter
    Convert a 32-bit hex value to its IEEE 754 single-precision decimal float. See the sign, exponent, and mantissa breakdown instantly.
  • IP Broadcast / Network Address Calculator
    Calculate network address, broadcast address, subnet mask, usable host range and host count from any IPv4 address and CIDR prefix length.
  • Video Bitrate Calculator
    Calculate video bitrate from file size and duration, or estimate file size from a target bitrate. Convert between Mbps, kbps and MB instantly.
  • ASCII to Binary Converter
    Convert any text to binary instantly. Each character becomes its ASCII code as an 8-bit binary number, concatenated into a full binary string.
  • FPS to Frame Time (ms) Calculator
    Convert frames per second (FPS) to frame time in milliseconds instantly. Find how many ms each frame takes at 30, 60, 120, 144 FPS and more.
  • SHA-256 Hash Calculator
    Free SHA-256 hash calculator. Enter any text and get its 256-bit SHA-2 digest as a 64-character hexadecimal string, plus the UTF-8 byte length.
  • MD5 Hash Calculator
    Free MD5 hash calculator. Compute the 128-bit MD5 (RFC 1321) digest of any text as a 32-character hex string, with UTF-8 byte and character counts.
  • Decimal to Octal Converter
    Convert any decimal (base 10) number to octal (base 8) instantly. Uses repeated division by 8, collecting remainders. Free online converter with steps.
  • Octal to Decimal Converter
    Convert any octal (base 8) number to decimal (base 10) instantly. Free online octal to decimal converter with the formula and a worked example.
  • Decimal to Binary Converter
    Convert any decimal (base 10) number to binary (base 2) instantly using the repeated division-by-2 method. Shows the binary digits and bit count.
  • Hex to RGB Color Converter
    Convert any hex color code (#RRGGBB or #RGB) to its RGB values instantly. See the red, green and blue channels plus a live color swatch.
  • Milliseconds to HH:MM:SS Calculator
    Convert milliseconds to hours, minutes, seconds and HH:MM:SS format instantly. Free online milliseconds to time calculator with a full breakdown.
  • Word and Character Counter
    Free word and character counter: count words, unique words, characters with/without spaces, space count, and a word-density table with optional stop-word removal.
  • Random PIN Generator
    Generate a random numeric PIN of any length from 1 to 100 digits. Choose whether to allow repeated digits. Ideal for ATM, banking and login security codes.
  • Random Password Generator
    Generate a strong random password up to 50 characters from lowercase, uppercase, digits, punctuation and symbols. Pick character sets and length. Nothing is stored.

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