Free tool · No signup
Online Timer and Stopwatch
Run a countdown timer or stopwatch in your browser, with pause and reset controls.
How to use this tool
Set the countdown duration or select Stopwatch. Start, pause and resume as needed. The countdown displays a completion message.
What to know
Keep this tab open. Browsers may delay background updates or suspend the device; this is not a dependable alarm. Elapsed time is calculated from the clock rather than counting update callbacks. No audio or notification permission is required.
Inputs stay on your device. Explore the full utility directory for more free tools.
More free tools
Image compressorReduce JPG, PNG or WebP to a target KB or MBCharacter and byte counterCount characters, words and UTF-8 bytesFile size converterConvert bytes, KB, MB, KiB and MiBMonthly CalendarBrowse any month, choose Sunday or Monday first, and print a clean calendar.Date Difference and Date CalculatorCount days between two dates or add and subtract days from a starting date.Percentage CalculatorFind a percentage of a number, percentage share, and percentage change instantly.Length, Weight and Temperature ConverterConvert common length, weight and temperature units without uploading data.Random Password GeneratorGenerate a random password locally with secure browser randomness and customizable character groups.Online Timer and StopwatchRun a countdown timer or stopwatch in your browser, with pause and reset controls.JSON Formatter and ValidatorValidate, pretty-print and minify JSON locally with clear syntax errors.URL Encoder and DecoderEncode and decode URL components, including Unicode text and percent escapes.Base64 Encoder and DecoderConvert UTF-8 text to Base64 and decode Base64 back to text locally.HEX, RGB and HSL Color ConverterChoose a color or enter HEX to convert it into RGB and HSL color values.