Developer & Utilities
62 tools · No registration · Temporary file processing
UUID / GUID GeneratorGenerate v4 or v7 identifiers in your browser, then copy or download in batches.Password Strength CheckerAnalyze locally as you type, with common patterns and practical suggestions.Number Base ConverterConvert integers between bases 2–36 with exact large-integer precision.Timestamp ConverterConvert seconds, milliseconds and dates with explicit time zones.Online CalculatorCalculate with arithmetic, parentheses and explicit percent rules.QR Code GeneratorGenerate QR codes from text or links, pick colors, drag a logo and verify actual PNG and SVG exports.QR Code ReaderDrag an image scan region or use your camera. Locate multiple QR codes and inspect text and raw bytes locally.Password GeneratorGenerate passwords locally with custom character sets, length and batch size.RMB Uppercase AmountConvert a CNY amount into Chinese uppercase numerals without implicit rounding.Periodic TableExplore 118 elements, atomic weights and electron configurations. Search, filter and export.Domain IP LookupQuery IPv4, IPv6 and CNAME records, copy answers and export JSON.Countries, Capitals, Flags & DatesExplore capitals, flags and formation or independence milestones for 195 countries. Filter by region and export CSV.Unit ConverterConvert 26 categories including pace, current, voltage, apparent power, reactive energy and illuminance. Export all results.Byte Base ConverterByte Base Converter, processed in your browser with copy and download.Signed / Unsigned BytesSigned / Unsigned Bytes, processed in your browser with copy and download.ASCII TableASCII Table, processed in your browser with copy and download.IEEE 754 ConverterIEEE 754 Converter, processed in your browser with copy and download.Sign / Ones / Twos ComplementSign / Ones / Twos Complement, processed in your browser with copy and download.Hex CalculatorHex Calculator, processed in your browser with copy and download.Modular ExponentiationModular Exponentiation, processed in your browser with copy and download.Quotient / RemainderQuotient / Remainder, processed in your browser with copy and download.chmod Calculatorchmod Calculator, processed in your browser with copy and download.Screen PPI CalculatorScreen PPI Calculator, processed in your browser with copy and download.IPv4 to IPv6IPv4 to IPv6, processed in your browser with copy and download.