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Dev Tools
C# DateTime Formatter
Two-way C# / .NET date formatter. Build and preview DateTime.ToString() output live, or paste an example date and detect the matching format string for ParseExact. Custom and standard specifier reference included.
Date & Time Calculator
Calculate dates and time durations online - add/subtract time periods and sum multiple durations easily.
Date Difference Calculator
Calculate date differences online - find exact time between dates in days, weeks, months, and years.
Java DateTimeFormatter
Two-way Java date formatter. Build and preview LocalDateTime.format() output live, or paste an example date and detect the matching DateTimeFormatter.ofPattern() string. Full pattern-letter reference included.
PHP DateTime Formatter
Two-way PHP date formatter. Build and preview date() / DateTime::format() output live, or paste an example date and detect the matching PHP format string. Full format-character reference included.
Python strftime Formatter
Two-way Python date formatter. Build and preview datetime.strftime() output live, or paste an example date and detect the matching strptime format string. Full directive reference included.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and dates to epoch time. Supports seconds, milliseconds, UTC, and local timezone.