Precision stopwatch with start, stop, lap recording, and reset functionality. Lap times are displayed in a table for easy comparison. Input never leaves your device — everything runs locally in your browser.
Generates real scannable barcodes in UPC-A, EAN-13, Code 128, and Code 39 — JsBarcode encoders with guard patterns, checksums, and start/stop codes, rendered to SVG. Input never leaves your device — everything runs locally in your browser.
Configurable countdown timer with hours, minutes, and seconds input. Features start, pause, and reset controls with visual progress bar. Input never leaves your device — everything runs locally in your browser.
See live times across world time zones with DST handling — schedule global meetings right. Know Tokyo time before calling — free, local, no signup.
Trim and cut audio files online — MP3, WAV, M4A, FLAC, and OGG. Set start and end times with sliders, then download the trimmed MP3 clip.
Remove and replace image backgrounds with edge-aware detection — no green screen needed. Sellers shoot product photos on any table, then swap to clean white. Runs locally on canvas — free to start, fair limits.
Whole-second display ticking once per second in HH:MM:SS — plenty for training splits and casual timing. Not millisecond precision and not certified for official race timing.
Hit Lap anytime: the lap time records into the on-screen table with the running total. There is no export or copy button — read totals off the table.
It ticks once per second while the tab stays active; background throttling can slow the count since it increments per tick rather than from the wall clock. Keep the tab foreground for accurate runs.
Stopwatch counts up from zero (measuring how long something took); timer counts down to zero (alerting when time is up). This page is the former.
No. Everything runs locally in your browser. Nothing leaves your device.
Timer
Configurable countdown timer with hours, minutes, and seconds input. Features start, pause, and reset controls with visual progress bar. Input never leaves your device — everything runs locally in your browser.
Interval Timer
Repeating interval timer for workouts and training. Configure sets, work period, and rest period with automatic cycling. Input never leaves your device — everything runs locally in your browser.
Last updated October 2026