Timestamp Converter
Convert Unix timestamps to dates and back.
Unix timestamps count seconds (or milliseconds) since January 1, 1970 UTC. Logs, databases, and APIs often store dates this way, but 1718745600 means nothing at a glance. Utilitoo's Timestamp Converter translates between epoch values and readable dates in both directions.
Developers decode JWT exp claims, parse database created_at fields, debug webhook timestamps, and convert log entries during incident response. Data engineers normalize timestamps across systems that use seconds versus milliseconds in mixed microservice stacks.
Paste a timestamp or pick a date and copy the result in your preferred format. Watch for the common seconds versus milliseconds mistake: a 10-digit value is usually seconds, while 13 digits usually means milliseconds. Combine with Date Difference Calculator or Age Calculator for related time math.
All conversion runs locally in your browser on Utilitoo. Your timestamps are never uploaded. Free, accurate, and privacy-first for developers, SREs, and analysts working with epoch time in logs and APIs. Support staff investigating account activity and finance teams reconciling transaction logs frequently translate epoch values while on calls without opening a terminal. Utilitoo makes it easy to sanity-check whether a timestamp is in the future, expired, or off by a timezone offset before you escalate an incident. As part of Utilitoo's free, privacy-first toolkit, this page requires no sign-up and keeps your work on your device.
Use Timestamp Converter when you need a private, fast pass on timestamp converter data. Convert Unix timestamps to dates and back. Validate surprising output on a staging sample before it influences production changes.
Common use cases
- Converting Unix epoch values from API logs, JWT exp claims, or database exports to human-readable dates.
- Debugging timezone offsets when a server stores UTC but your team works in local time.
- Verifying scheduled job timestamps in Kubernetes, cron, or queue systems during incidents.
- Preparing epoch values for test fixtures when writing integration tests against time-based APIs.
- Explaining timestamp formats to teammates who receive mixed seconds vs milliseconds values.
Tips & common mistakes
Always confirm whether the source uses seconds (10 digits) or milliseconds (13 digits) - mixing them up is the most common timestamp mistake. For JWT debugging, pair with JWT Decoder to inspect exp and iat claims in context. Utilitoo converts in your browser; no timestamp data is sent to our servers.
Common errors
- Unexpected output from Timestamp Converter - double-check input format, encoding, and whether the paste was truncated.
- Browser limits - very large inputs may slow the tab; split into smaller chunks if performance drops.
How to use
- Enter a Unix timestamp or pick a date.
- View conversions in multiple formats.
- Copy any result with one click.
Frequently Asked Questions
How do I convert a Unix timestamp to a readable date?▼
Paste the epoch value into Utilitoo and the tool displays the equivalent date and time in your local timezone instantly.
What is the difference between seconds and milliseconds timestamps?▼
Unix seconds timestamps are typically 10 digits. Millisecond timestamps are 13 digits. Using the wrong unit shifts the date by orders of magnitude.
How do I convert a date to a Unix timestamp?▼
Select or enter a date and time in Utilitoo and copy the generated epoch value in seconds or milliseconds as needed.
What timezone does the timestamp converter use?▼
Utilitoo displays converted dates in your browser's local timezone while preserving accurate UTC epoch values.
Is it safe to convert production log timestamps online?▼
Yes on Utilitoo. Conversion is 100% browser-local. No timestamps are sent to or stored on our servers.
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