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Preview of Hours Ago Calculator

Hours Ago Calculator by Jonathan_Developer

Quickly convert a number of hours into a timestamp ("X hours ago") and convert timestamps to hours ago.

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About this extension
Overview:
Hours Ago Calculator is a lightweight, offline Firefox extension that helps you quickly calculate time differences in both directions:

Convert a number of hours into a past or future timestamp (e.g., “36 hours ago” → 2025-11-04 03:15:00).
Convert a specific date/time into how many hours or days ago it occurred.


Perfect for time tracking, log analysis, scheduling, or simply satisfying your curiosity about “how long ago” something happened.

Features:
Convert hours → timestamp and timestamp → hours ago instantly.
Works entirely offline — no data ever leaves your browser.
Copy results to clipboard with one click.
Clean, responsive interface.
No ads, no analytics, and no external connections.

Why it’s safe:
The extension does not collect or transmit any personal data.
All calculations happen locally on your device.
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Permissions and data

Required permissions:

  • Input data to the clipboard

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
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Version
1.0.0
Size
13.5 KB
Last updated
4 days ago (Nov 6, 2025)
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License
MIT License
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