Calculate the time elapsed between any date and now. Shows results in years, months, weeks, days, hours, minutes, and seconds.
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Calculate the exact duration between two times. Handles overnight time spans and displays results in hours, minutes, and seconds.
Timers (countdown, event countdown, stopwatch with laps), date math (add/subtract days, difference calculator, week number), converters (date↔timestamp), and time math (add/subtract hours/minutes, duration between times). (Time converter has its own dedicated page.)
Computes exact age in years, months, days, hours, minutes, and seconds from a given birth date relative to any target date.
Calculate the exact number of days between any two dates. Simple and accurate date difference calculator.
Time Since Calculator lets you calculate the time elapsed between any date and now. Shows results in years, months, weeks, days, hours, minutes, and seconds.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Calculate the time elapsed between any date and now. Shows results in years, months, weeks, days, hours, minutes, and seconds. It's ideal for developers, designers, and anyone who needs to calculate the time elapsed between any date and now without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. All numeric values are entered through input fields with real-time updates.
Yes. After the initial page load, Time Since Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check individual tool descriptions for specifics.
No. All code processing — formatting, minification, conversion, hashing — runs locally in your browser.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. SQL uses sql-formatter, JSON uses native JSON.parse, and other formatters follow widely adopted formatting rules.
Yes. All developer tools work fully offline after the initial page load.
Time Converter
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results.
Diff Checker
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors.
Regex Tester
Provides an interactive environment where users can write a regular expression pattern, test it against sample strings, and view real-time match.
JSON Formatter
Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
JS Minifier
Strips comments, whitespace, and shortens local variable names in JavaScript source without altering execution semantics.
Base64 Encode/Decode
Encodes text or small files into Base64 strings and decodes them back with automatic MIME-type detection for binary safety.