Developer Tools

  • Binary to Decimal Converter
    Convert any binary (base 2) number to decimal (base 10) instantly. Enter your bits and get the decimal value using the positional weight formula.
  • 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.
  • 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.
  • Epoch Seconds to Human Date Calculator
    Convert a Unix timestamp (epoch seconds) into a human-readable UTC date and time, with ISO 8601 output and full year/month/day/hour 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.
  • Numbers to Words Converter
    Convert numbers to words in English. Spell any number, format as currency (dollars, euros, pounds and more), or write check amounts, with selectable letter case.
  • Digits to Words Converter
    Convert digits to spoken words character by character (123 to "one two three"). Read tracking numbers, dates, SSNs and serials in 12 languages with case options.
  • Computer (Digital) Storage Units Converter
    Convert digital storage between bits and bytes, decimal (kB, MB, GB) and binary (KiB, MiB, GiB) units. Free, accurate converter with the IEC standard explained.
  • Parity Bit Calculator
    Calculate the even and odd parity bit for any binary data. Counts the 1 bits and shows the parity bit needed for error detection.
  • Pixel Aspect Ratio Calculator
    Calculate Pixel Aspect Ratio (PAR) from stored pixel dimensions and display aspect ratio. PAR = DAR ÷ SAR, where SAR = stored width ÷ height.
  • Odd Parity Bit Calculator
    Calculate the odd parity bit for any binary string. Determines the parity bit so the total number of 1s (data + parity) is odd, for error detection.
  • Even Parity Bit Calculator
    Calculate the even parity bit for any binary string. Counts the 1s and returns the parity bit that makes the total number of 1s even.
  • CSS Aspect Ratio Calculator
    Calculate the simplified aspect ratio from any width and height, plus the padding-top percentage for responsive CSS aspect-ratio boxes.
  • Uptime / Downtime Calculator
    Calculate allowed downtime for any SLA uptime percentage (99.9%, 99.99%, etc.) per day, week, month, or year — in days, hours, minutes & seconds.
  • Baud Rate Calculator
    Calculate baud rate (symbol rate) from bit rate and the number of signal levels (M) for M-ary modulation. Free online baud rate calculator.
  • RAID Capacity Calculator
    Calculate usable RAID storage capacity for RAID 0, 1, 5, 6 and 10. Enter disk count and size to see usable space, overhead and efficiency.
  • RAM Latency Calculator
    Calculate true RAM latency in nanoseconds from CAS latency (CL) and memory speed (MT/s). Compare DDR4 and DDR5 modules instantly with this free tool.
  • Audio File Size Calculator
    Calculate uncompressed audio file size from sample rate, bit depth, channels, and duration. Get size in bytes, KB, MB plus the bitrate for WAV/PCM.
  • Video Frame Size Calculator
    Calculate the average size of a single video frame in bytes from bitrate and frame rate, plus the total file size for any clip duration.
  • Image Aspect Ratio Calculator
    Find the aspect ratio of any image and calculate proportional resize dimensions. Enter width and height to get the simplified W:H ratio instantly.
  • Resolution Scale Calculator
    Scale any image or video resolution by a factor. Calculate the new width, height, total pixel count and megapixels instantly with this free tool.
  • Image File Size Calculator
    Estimate an image's file size from width, height, color depth and compression. Get the result in bytes, KB and MB instantly.

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