Developer Tools

  • Luhn Algorithm Calculator
    Check if a number passes the Luhn (mod 10) algorithm. Validate credit card numbers, IMEIs and IDs with a step-by-step checksum breakdown.
  • IP Address CIDR Range Calculator
    Enter an IPv4 address and CIDR prefix to compute the network, broadcast, usable host range, subnet mask, wildcard mask, and host counts.
  • Table Column Sort Tool
    Sort the rows of any pasted table by a chosen column, ascending or descending. Handles numbers and text, stable order, optional row-total column.
  • Table Column Arithmetic Calculator
    Element-wise add, subtract, multiply or divide two numeric table columns row by row. Computes a[i] OP b[i] for every row with adjustable display precision.
  • Base-N Conversion Calculator
    Convert a non-negative integer between decimal, hexadecimal, octal, senary (base 6) and binary all at once. Universal base-N number converter for whole numbers.
  • Base64 Encoded Size Calculator
    Calculate the Base64-encoded size of any file or data. Estimate encoded bytes, ~33% overhead, with or without padding. Free instant tool.
  • Base-N Bitwise Logical Operation Calculator (AND, OR, XOR)
    Compute bitwise AND, OR and XOR of two non-negative integers entered in decimal, hex, octal, senary or binary. Results shown in all five bases.
  • Download Time Calculator
    Estimate how long a file takes to download from its size and your internet bandwidth, with an optional protocol overhead factor. Free and instant.
  • 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.
  • IP Subnet Calculator
    Free IPv4 subnet calculator. Enter an IP address and CIDR prefix to get the network, broadcast, subnet mask, host range and usable host count.
  • IPv4 Subnet Calculator
    Free IPv4 subnet calculator. Enter an IP address and CIDR prefix to get the subnet mask, network, broadcast, host range, and usable host count.
  • Binary Addition Calculator
    Add two binary numbers instantly. See the binary sum plus the decimal values and decimal total. Free, accurate base-2 addition calculator.
  • Amdahl's Law Calculator
    Calculate the theoretical speedup of a program with Amdahl's Law from the parallel portion and the number of processors or speedup factor.
  • Computer Storage Units Conversion Calculator
    Convert between bytes, KB, MB, GB, TB and PB using binary (1024) or decimal (1000) standards. Fast, accurate digital storage unit converter.
  • Pixels per Inch (PPI) Calculator
    Calculate the PPI (pixel density) of any screen from its resolution and diagonal size. Get dot pitch and megapixels instantly with this free tool.
  • RGB to CMYK
    Use this free online tool to convert RGB color values to CMYK format instantly for printing and design.

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