Developer Tools

  • Password Entropy Calculator
    Calculate password entropy in bits from length and character set. Estimate how strong and hard to crack your password is using log2 of the charset size.
  • Amdahl's Law Speedup Calculator
    Calculate theoretical speedup with Amdahl's Law. Enter the parallel fraction and processor count to find overall speedup, max speedup, and efficiency.
  • Current Unix Timestamp Calculator
    Convert milliseconds to a Unix timestamp (epoch seconds). Get the current epoch now plus minutes, hours, and days since Jan 1, 1970 UTC.
  • Bytes to KB/MB/GB Converter
    Convert bytes to kilobytes, megabytes and gigabytes instantly. Choose binary (1024) or decimal (1000) base. Free, accurate data size calculator.
  • Text to Hex Converter
    Convert text or ASCII characters to hexadecimal instantly. Each character becomes a 2-digit hex code. Choose space, colon, dash, or no separator.
  • Hex to ASCII / Text Converter
    Convert hexadecimal to readable ASCII text instantly. Decode hex byte pairs into characters — supports spaces, commas and 0x prefixes.
  • LLM Tokens to Words & Cost Calculator
    Convert LLM tokens to an estimated word count and compute API cost from a price per 1,000 tokens. Quick estimate for GPT, Claude and other models.
  • ASCII to Decimal Code Converter
    Convert any character to its decimal ASCII / Unicode code point instantly. Enter a letter, digit or symbol to get its numeric value (ord).
  • IP Address to Decimal Converter
    Convert an IPv4 address (a.b.c.d) to its 32-bit decimal integer value. Enter four octets and get the exact long integer representation instantly.
  • RGB to HSL Color Converter
    Convert RGB color values (0-255) to HSL — hue, saturation, and lightness — instantly with the exact conversion formula and a worked example.
  • MB to GB Converter
    Convert megabytes (MB) to gigabytes (GB) instantly. Choose decimal (1000) or binary (1024) standard. Free, accurate MB to GB conversion calculator.
  • Kbps to Mbps Converter
    Convert kilobits per second (Kbps) to megabits per second (Mbps) instantly. Enter a bitrate and get the Mbps value using Mbps = Kbps / 1000.
  • Gigabytes to Megabytes Converter
    Convert gigabytes (GB) to megabytes (MB) instantly. Choose decimal (1000) or binary (1024) base. Fast, accurate GB to MB conversion calculator.
  • WCAG Color Contrast Ratio Calculator
    Check the WCAG 2.x color contrast ratio between two hex colors. See if your text passes AA and AAA accessibility standards for normal and large text.
  • Password Crack Time Calculator
    Estimate how long a brute-force attack needs to crack your password from its length, character set and an attacker's guesses per second.
  • Text to Binary (ASCII) Converter
    Convert any text to binary online. Each character becomes its ASCII code, then an 8-bit binary string. Get spaced, continuous, and decimal output instantly.
  • Epoch Milliseconds to Date Converter
    Convert a Unix epoch timestamp in milliseconds to a human-readable UTC date and time (ISO 8601), with year, month, day, hour, minute and second breakdown.
  • HSL to RGB Color Converter
    Convert any HSL color (hue, saturation, lightness) into RGB values (0-255). Free, instant HSL to RGB converter with a live color preview swatch.
  • Hosts per Subnet Calculator
    Calculate the number of usable host IP addresses per subnet from a CIDR prefix length (/8 to /32). Fast IPv4 subnetting host count tool.
  • Binary to Text Converter (ASCII Decoder)
    Convert binary code to readable text instantly. Decode 8-bit binary groups into ASCII/Unicode characters with this free binary to text translator.
  • Decimal to Binary Converter
    Convert any decimal (base-10) number to binary (base-2) instantly. See the binary digits and bit count using the divide-by-2 remainder method.
  • Binary to Decimal Converter
    Convert any binary number to decimal (base 10) instantly. Free binary to decimal converter calculator with step-by-step positional weighting.
  • Unix Timestamp to Local Time Converter
    Convert a Unix timestamp (epoch seconds) to a readable local date and time for any UTC offset. Get the date, time, and day of the week instantly.
  • HEX to RGB Color Converter
    Convert any HEX color code to RGB values instantly. Supports 3- and 6-digit hex with or without #, and shows a live color swatch.

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