Cron tab — Type any cron expression or click a shortcut. Explains it in plain English (“Runs at minute 0, at 9 o’clock, on Monday through Friday”), breaks out each of the 5 fields in labeled tiles, and shows the next N run times (5/10/20/50) with both UTC and your local time side by side. Supports all 5-field cron syntax plus @daily, @hourly, @weekly, @monthly, @yearly. Copy button copies the expression.
ISO 8601 tab — Paste any date string the browser can parse. Shows year, month, day, day of week, day of year, ISO week number, and time components. Equivalent formats panel shows ISO 8601, Unix timestamp in seconds and milliseconds, Julian Date, RFC 2822, and a plain human-readable string. Now button fills in the current time.
Duration tab — Enter a duration in any format: 5400, 1:30:00, 1h 30m 45s, 5400s, 90m. Outputs HH:MM:SS, human readable, total seconds, milliseconds, minutes, hours, days, and weeks. A second section lets you add or subtract two durations with a +/− toggle.
Countdown tab — Pick a target date and time (local or UTC), optionally label it. Live countdown in days/hours/minutes/seconds updating every second, plus total seconds/hours/days below. Quick targets for New Year, Christmas, July 4, and the solstice/equinox. Shows target details including day of week and Unix timestamp.
The Countdown tab also generates four shareable formats from the Embeddable Widget section:
Copy Widget Code — a fully self-contained HTML snippet with a live JavaScript countdown. Paste it into any website or HTML block and it runs with no dependencies.
Preview Widget — renders the widget inline so you can see what it looks like before copying.
Copy GIF URL — a direct URL to a server-generated countdown image hosted on geekdistractions.com. The image updates every time it is fetched, so each time someone opens a message or page containing it they see the current remaining time. Paste the URL directly into iMessage, Slack, Teams, Discord, or any app that auto-expands image URLs into inline previews — it shows up as an image without needing any HTML.
Copy <img> Tag — the full HTML image tag ready to paste into an email HTML editor, a website, or any CMS. The image is a single-frame GIF generated fresh on every fetch, showing days, hours, and minutes remaining rounded to the nearest 10 minutes. When the target date passes, the image automatically switches to a “has passed” frame showing the event name and date.
No ads. No fees. No signup. Just a tool that works.
Dev Clock
// cron explainer, iso 8601 parser, duration converter, countdown timer — no signup, no paywall, ever
Generates a self-contained HTML snippet you can paste into any website. No dependencies, no external calls.
