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Free Unix Timestamp Converter: Date, Timezone & Duration Tool
Convert Unix timestamps to human-readable dates, dates back to timestamps, and break down any duration - with timezone support, auto-unit detection, and 8 output formats.
100% Free
Privacy Focused
Instant Results
Works Everywhere
Timestamp Converter
Convert Unix timestamps to human-readable dates, dates back to timestamps, and break down any duration - with timezone support, auto-unit detection, and 8 output formats.
Unix Timestamp → Human Date
Human Date → Unix Timestamp
Duration Breakdown
About This Tool
What is Timestamp Converter?
Unix timestamps - the number of seconds (or milliseconds) elapsed since January 1, 1970 UTC - appear throughout web development in API responses, database records, log files, and JWT token fields. This Unix Timestamp Converter translates between epoch values and human-readable date-time strings, with full timezone support.
Enter a Unix timestamp in seconds or milliseconds and the converter outputs the corresponding date, time, and weekday in your selected timezone. Enter a human-readable date and time and it outputs the epoch value. Useful when reading API responses from Stripe, Twilio, GitHub, AWS, or any service that returns timestamp fields.
Timezone selection covers all IANA timezone identifiers - convert a UTC timestamp to Eastern, Pacific, IST, JST, or any other zone to understand exactly when an event occurred locally. The offset from UTC is displayed alongside the converted time for quick sanity-checking.
The ISO 8601 output format (2024-03-15T14:30:00Z) is included alongside the display format - useful when you need a formatted string for logs, file names, or API parameters that require ISO format.
Additional utilities: relative time display showing how many hours, days, or weeks ago or from now the timestamp falls; duration calculation between two timestamps in seconds, minutes, hours, and days; and current epoch value for reference. Debugging token expiration, session timeouts, scheduled job runs, and rate-limit reset times becomes straightforward when you can convert timestamps without writing code.
Features
Powerful Features
Everything you need in one amazing tool
Unix ↔ Date Conversion
Convert any Unix timestamp to a human date, or any date back to a Unix timestamp. Both directions with full precision.
Auto-Detect Unit
Paste any timestamp - seconds, milliseconds, microseconds, or nanoseconds. The tool detects the unit from digit count automatically.
Timezone Selector
Output dates in any of 25 major timezones worldwide. Uses the browser Intl API for accurate DST-aware conversion.
8 Output Formats
UTC, local, selected timezone, ISO 8601, RFC 2822, RFC 3339, relative time, and day info (weekday, ISO week, day-of-year).
Duration Breakdown
Enter any number of seconds and get a breakdown into years, days, hours, minutes, and seconds - plus totals in minutes, hours, days, and weeks.
Copy Every Value
Every result card has a dedicated copy button. Click the value or the icon - both copy to clipboard instantly.
Simple Process
How It Works
Get started in 4 easy steps
1
Paste Your Timestamp
Paste any Unix timestamp - seconds, milliseconds, microseconds, or nanoseconds. Use the Paste button or the Now button to fill instantly.
2
Choose Timezone
Select a target timezone from the dropdown. Auto-detect handles the unit, or pick manually for full control.
3
Get 8 Formats at Once
Hit Convert and see ISO 8601, RFC 2822, RFC 3339, UTC, local, relative time, and more - all at once.
4
Copy or Use Duration
Copy any individual result. Or use the Duration block to break down seconds into a human-readable time span.
Why Us
Why Choose Our Timestamp Converter?
Stand out from the competition
Instant, No Setup
Paste and convert in under a second. No account, no install, no rate limits.
Smart Unit Detection
Auto-detects seconds, ms, µs, or ns from the digit count. No manual switching needed.
8 Formats Simultaneously
See UTC, ISO 8601, RFC 2822, RFC 3339, relative time, and day info all at the same time.
Real Timezone Conversion
DST-aware output for 25 major timezones using the browser's built-in Intl API. No offsets to calculate manually.
Duration Calculator
Convert raw seconds into years, days, hours, and minutes. Understand TTLs and intervals at a glance.
100% Private
All conversions happen in your browser. No server. Safe for production timestamps, JWT payloads, and log data.
Use Cases
Perfect For
See how others are using this tool
API Debugging
Paste a timestamp from an API response and instantly see what date and time it represents, in your timezone.
JWT & Token Expiry
Decode the exp field from a JWT token. See exactly when it expires in local time and how long remains.
Log File Analysis
Convert server or application log timestamps to readable local times. Correlate events across systems.
Database Timestamps
Convert created_at or updated_at epoch values from database records to verify data or build queries.
TTL & Cache Lifetimes
Enter a TTL value in seconds and use the Duration block to understand how long it actually is - "14 days" is clearer than "1209600".
Scheduling & Cron
Convert a planned run date to a Unix timestamp for cron jobs, task queues, or scheduled cloud functions.
Frequently Asked Questions
Everything you need to know about Timestamp Converter
A Unix timestamp (also called epoch time or POSIX time) is the number of seconds elapsed since January 1, 1970 00:00:00 UTC. It is timezone-independent, compact (just a number), and trivial to compare - which is why virtually every programming language, database, and API uses it. JavaScript uses milliseconds by default (13 digits), while most other languages use seconds (10 digits).
The tool checks the number of digits: ≤ 10 digits = seconds, ≤ 13 digits = milliseconds, ≤ 16 digits = microseconds, more = nanoseconds. This matches the standard ranges for each unit through the year 2100+. You can always override by selecting a unit manually in the dropdown. When auto-detect is active, a small badge shows which unit was detected.
The tool uses the browser's Intl.DateTimeFormat API with IANA timezone identifiers (e.g. "America/New_York", "Asia/Kolkata"). This means DST (Daylight Saving Time) is handled correctly - the same timestamp on a winter date and a summer date will show the correct offset for each. The output always shows the resolved UTC offset alongside the formatted time.
ISO 8601 (e.g. 2026-01-15T09:00:00+05:30) is the modern standard used by JSON APIs, HTML date inputs, and most databases. RFC 2822 (e.g. Thu, 15 Jan 2026 09:00:00 +0530) is the older email header format used by SMTP, HTTP headers, and some legacy APIs. RFC 3339 is a stricter profile of ISO 8601 used in IETF protocols and feeds. Use ISO 8601 for new APIs; RFC 2822 for email or HTTP.
It takes any number of seconds and decomposes it into years, days, hours, minutes, and seconds - like a reverse stopwatch. It also shows the same duration expressed purely in minutes, hours, days, and weeks. This is useful for understanding TTL values ("1209600 seconds" → "14 days"), subscription lengths, session timeouts, or any interval stored as a raw second count.
Yes. Every conversion runs entirely in your browser using JavaScript. No data is sent to any server - not the timestamps, not the dates, not the results. The tool works offline once loaded. It is safe to use with JWT tokens, database records, server logs, or any other sensitive timestamp data.
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