Unix Timestamp Converter
Convert between Unix epoch and human-readable dates with timezones.
Convert between Unix epoch and human-readable dates with timezones.
This free Unix Timestamp Converter from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the Unix Timestamp Converter
- Pick the unit you have and the unit you want.
- Enter the value.
- Read the converted value - most tools update as you type.
- Use the swap button to reverse the direction if needed.
What you can do with the Unix Timestamp Converter
- Convert recipe ingredients between metric and imperial.
- Translate engineering specs across systems.
- Check shipping weights and dimensions before ordering.
- Quick travel conversions for distance, speed and currency.
Why use KX Toolkit's Unix Timestamp Converter
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
For very large or very small numbers, use the scientific-notation option - it avoids floating-point rounding errors.
Related Unit Converter Tools
If you find this tool useful, explore the full Unit Converter Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
What is a Unix timestamp?
A Unix timestamp is the number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (the Unix epoch). It is a compact, timezone-independent way to represent moments in time. So 1,700,000,000 corresponds to 14 November 2023 at 22:13:20 UTC. The converter takes a timestamp or a date and returns the other, in any timezone.
How do I convert a timestamp to a human date?
Paste the timestamp into the converter and pick a target timezone. The tool formats it as YYYY-MM-DD HH:MM:SS. For example, 1,609,459,200 is 2021-01-01 00:00:00 UTC, or 2020-12-31 19:00:00 EST. Always set the timezone explicitly, since the same timestamp displays differently around the world.
What is the year 2038 problem?
On 19 January 2038, 32-bit signed Unix timestamps will overflow, since the maximum is 2,147,483,647 seconds (about 68 years from 1970). Systems that store time in 32-bit integers will wrap around to negative values. Modern systems use 64-bit timestamps, which are safe for billions of years. Legacy embedded devices may still need updating.
Are timestamps in seconds or milliseconds?
Classic Unix timestamps are seconds, but JavaScript and many modern APIs use milliseconds (multiply seconds by 1,000). A timestamp like 1,700,000,000,000 is therefore November 2023 in milliseconds, while 1,700,000,000 is the same date in seconds. The converter detects the magnitude or lets you pick, so you do not get a date in the year 55,000.
How do timezones affect the conversion?
A Unix timestamp is always UTC under the hood; the timezone only changes how it is displayed. The converter lets you pick from common zones (UTC, EST, PST, GMT, IST, JST) or enter a TZ name like America/New_York. Daylight saving is applied automatically based on the chosen date, so winter and summer give different local strings.
Can I convert future or historical dates?
Yes. The Unix epoch is 1 January 1970, but timestamps can be negative for earlier dates. So -86,400 is 31 December 1969 UTC. You can also project far into the future, like 4,000,000,000 (the year 2096). The converter handles a wide range, though some systems fail outside 1970-2038 unless they use 64-bit timestamps.
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