Unix Timestamp Converter Online — Epoch to Date, UTC & Local Time
Free unix timestamp converter online: paste epoch seconds or milliseconds to get UTC, local time, and ISO dates—or convert a date back to a timestamp. Instant, client-side.
Epoch → human time in one paste.
Spoold's Unix Timestamp Converter Online turns Unix epoch seconds or milliseconds into UTC, local time, and ISO—or the other way around. No install; runs in your browser.
Open the timestamp converter →
Seconds vs milliseconds
Values around 1.7e9 are usually seconds. Values around 1.7e12 are usually milliseconds (JS Date.now()). Spoold detects both so you can convert a unix timestamp to UTC without guessing the scale.
| Input | Likely unit | Example |
|---|---|---|
| 1710000000 | Seconds | ~2024-03-09 UTC |
| 1710000000000 | Milliseconds | Same instant as above, JS style |
When you need an epoch converter
API & logs
Decode created_at fields and log lines that only print epoch ints.
JWT expiry
Cross-check exp / iat with the JWT decoder.
Cron next-run sanity
Pair with the cron parser when schedules look “off by hours.”
Support tickets
Paste the customer's timestamp and answer in their timezone.
How to convert
- Open /tools/time/convert.
- Paste an epoch (sample loads by default) or a date.
- Read UTC, local, and ISO outputs; pick a zone when comparing regions.
- Copy the format you need for docs, SQL, or API payloads.
Tip: DST and IANA zones
“Local” follows the browser. For support across offices, pick an IANA zone (e.g. America/New_York) instead of assuming everyone is on UTC.
Related search terms
Frequently asked questions
How do I convert a Unix timestamp to UTC?
Is it free?
Seconds or milliseconds?
Why is local time wrong for my teammate?
Can I convert a date back to epoch?
Convert a timestamp
Paste epoch seconds or ms into the converter.
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