Generate Custom Clock Times
Build clock times from a start time, a step and a count. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate Custom Clock Times
- 1. Choose a starting time. Enter the first clock time in the Start time field. Every other value in the list is built by repeatedly adding the step to this one.
- 2. Set the step in seconds. Enter the Step (seconds) between consecutive times. A step of 3600 produces one entry per hour, while 900 produces one every fifteen minutes.
- 3. Set the count, seconds and separator. Enter How many times to produce, toggle Include seconds to show HH:MM:SS instead of HH:MM, and pick a Separator matching the format the destination expects.
- 4. Copy the generated times. Copy the finished list of clock times and paste it into a booking form, timetable spreadsheet or test dataset.
When to use Generate Custom Clock Times
Generate Custom Clock Times builds a list of clock times from a start time and a step measured in seconds, giving finer control over spacing than a fixed unit picker. Use it whenever the interval between times does not divide evenly into whole minutes or hours.
- Building appointment slots with an odd interval. A clinic books patients every 20 minutes rather than the usual 15 or 30. Set the step to 1200 seconds from the opening time and generate the full day's slots.
- Creating cue points for a livestream schedule. A stream's segments change every 90 seconds during a rapid-fire round. Step by 90 from the segment's start time to list every cue point for the run of show.
- Populating a spreadsheet column of shift start times. A rota needs staggered start times 10 minutes apart to avoid a crowded entrance. Generate the list with the separator set to match the spreadsheet's paste format.
- Testing a scheduler with second-level precision. A job scheduler's tests need exact clock times spaced by a specific number of seconds to check for off-by-one errors. Generate the expected sequence here first for comparison.
Examples
Every hour from midnight
Output
00:00:00 01:00:00 02:00:00
About the Generate Custom Clock Times tool
Generate Custom Clock Times is a free online tool that works entirely inside your web browser. Build clock times from a start time, a step and a count. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 90 Time utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with 5 settings, including Start time, Step (seconds), How many times and Include seconds, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Generate Custom Clock Times cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.