Developer Tools

  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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).
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Base Converter Calculator
    Convert numbers between any bases from 2 to 36 — binary, octal, decimal, hexadecimal and more. Shows the decimal value and the converted result instantly.
  • Random UUID Generator (v4)
    Generate random version 4 UUIDs instantly. Create 1-50 RFC 4122 compliant UUIDs with options for case and hyphens. Free online UUID generator.
  • GB to TB Converter
    Convert gigabytes (GB) to terabytes (TB) instantly. Choose binary (1024) or decimal (1000) standard for accurate storage capacity conversion.
  • KB to MB Converter
    Convert kilobytes (KB) to megabytes (MB) instantly. Choose binary (1024) or decimal (1000) standard for accurate file size conversions.
  • 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.
  • Data Storage Unit Converter
    Convert data storage units between Bytes, KB, MB, GB and TB using binary (1024) conversion. Fast, accurate digital storage size converter.
  • Text to Base64 Encoder
    Free online Base64 encoder. Convert any text or UTF-8 string to Base64 instantly. See input byte count, output length, and learn how Base64 works.
  • URL Encode / Decode Calculator
    Encode or decode text using RFC 3986 percent-encoding. Convert unsafe characters to %XX hex bytes and reverse them back instantly.

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