What does the Timezone Converter do?

Convert times across timezones. GeekTool runs the Timezone Converter entirely in your browser — input never leaves your device.

Is the Timezone Converter free?

Yes. The Timezone Converter is part of GeekTool, a free suite of 50+ developer utilities. No sign-up, no ads inside the tool, no quotas.

No. All processing is client-side JavaScript. Your input stays in your browser tab — we never see it.

Convert times across timezones.

Date / time Source TZ

Timezones

What does the Timezone Converter do?: Convert times across timezones. GeekTool runs the Timezone Converter entirely in your browser — input never leaves your device.
Is the Timezone Converter free?: Yes. The Timezone Converter is part of GeekTool, a free suite of 50+ developer utilities. No sign-up, no ads inside the tool, no quotas.
Does the Timezone Converter send my data to a server?: No. All processing is client-side JavaScript. Your input stays in your browser tab — we never see it.