Unix Timestamp Converter

If you’ve ever stared at 1712000000 in a log file and wondered what time that actually was, you’re in the right place. Our Unix timestamp converter handles both directions — epoch numbers to human dates, and dates back to timestamps — with a live clock, millisecond support, and one-click copy.

Used daily by developers debugging APIs, sysadmins parsing logs, and anyone who needs to translate between machine time and human time. All in your browser, zero data sent anywhere.

Why Unix Timestamps Matter

Most programming languages, databases, and APIs measure time as seconds (or milliseconds) since January 1, 1970. It’s clean, unambiguous, and timezone-free — perfect for computers. But when you need to know what actually happened at timestamp=1709654400, you need a converter. That’s this page.

What You Can Do Here

Live Clock & Current Timestamp. A big digital clock runs as soon as the page loads, with the current Unix timestamp updating in real time — both seconds and milliseconds. Hit the stop button to freeze a moment.

Timestamp → Date. Paste a 10-digit (second) or 13-digit (millisecond) number — we auto-detect which format you’re using — and get the equivalent date in both ISO 8601 and your local timezone.

Date → Timestamp. Use the datetime picker to choose any past or future date, and the corresponding Unix timestamp appears instantly. Handy for setting expiration times in code.

Seconds ↔ Milliseconds toggle. Different frameworks expect different precision. JavaScript uses milliseconds, most APIs use seconds. Switch with one click.

One-click copy on everything. Every result, every timestamp — click to copy, paste into your code or config.

When Developers Reach for This

• Debugging API responses: That created_at: 1712000000 field — was that 10 minutes ago or last week?
• Log file forensics: Your server crashed at epoch 1709654400. When was that in your local time? Was it during a deploy window?
• Writing SQL queries: Need to compare WHERE created > UNIX_TIMESTAMP('2024-03-15') — convert the date first to make sure you got the right number.
• Setting JWT expirations: “Expire in 24 hours” → what’s the exact epoch for now + 86400 seconds?
• Teaching & learning: Showing a team how timestamps work, why Y2038 was a thing, and why 64-bit handling matters.

Technical Notes

• All timestamps are UTC-based. Displayed dates adjust to your browser’s local timezone automatically.
• 10 digits = seconds, 13 digits = milliseconds. The tool figures it out.
• China observed daylight saving time from 1986 to 1991 — historical timestamps from that period may be off by an hour.
• No 32-bit overflow here. We use 64-bit handling, so Y2038 isn’t a problem.
• Everything happens locally. Your timestamps never touch a server.

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Last verified: 2026-07-16 · Sources: miguelmota/unix-timestamp-converter, tool.browser.qq.com