⏱️ Unix Timestamp Epoch Converter
Convert unix timestamp epoch to date, or date to epoch instantly. Auto-detects seconds vs milliseconds. Free, private, no signup.
About This Unix Timestamp Epoch Converter
This unix timestamp epoch converter translates any Unix epoch value into a human-readable date and time — or converts a date back into its epoch equivalent. It runs entirely in your browser using the native JavaScript Date object, with no libraries, no servers, and no data leaving your device.
Unlike most epoch tools that require you to specify the unit manually, this unix timestamp epoch converter auto-detects whether your input is in seconds (10-digit) or milliseconds (13-digit) and handles both without extra steps. It supports all major timezones and outputs results in four formats simultaneously — Local, UTC, ISO 8601, and relative time.
How to Use This Unix Timestamp Converter
Converting Epoch Time Step by Step
The unix timestamp epoch converter has two tabs for the two most common conversion directions. Select the tab that matches what you have.
Tab 1 — Timestamp to Date: Paste any epoch value into the input field. The
tool auto-detects seconds or milliseconds and shows the date in four formats: Local, UTC,
ISO 8601 (e.g. 2024-11-14T22:13:20.000Z), and a relative label like "3 hours
ago". Select any timezone to see the local equivalent in that region. Click the copy icon
next to any result row to grab just that value.
Tab 2 — Date to Timestamp: Pick a date and time using the pickers, choose the timezone the date should be interpreted in, and click Convert. The unix timestamp epoch converter returns epoch in seconds, epoch in milliseconds, ISO 8601, and UTC string — all copyable individually.
Live Ticker: The current Unix timestamp updates every second at the top of the page. Use the Copy button to grab it instantly, or click "Use in Tab 1" to send it straight into the converter for inspection.
Output Formats at a Glance
- Local Date/Time — date and time in your selected timezone
- UTC Date/Time — the same moment in Coordinated Universal Time
- ISO 8601 — machine-readable format used in APIs and databases
- Relative Time — "3 days ago" or "2 hours from now"
Who Is This Unix Timestamp Epoch Converter For
This unix timestamp epoch converter is designed for anyone who works with time data in technical environments. Four groups reach for it most often.
Developers Debugging APIs and Auth Tokens
When an API response returns a raw epoch value, a unix timestamp epoch converter turns it
into a readable date instantly. JWT tokens store expiry times as epoch values in the
exp and iat fields — paste them here to validate session lifetimes
and token freshness without writing a single line of code.
DevOps Engineers Reading Server Logs
Server access logs, cron job outputs, and monitoring alerts often record events as epoch timestamps. Run each value through the unix timestamp epoch converter to reveal whether an incident occurred before or after a deployment, a config change, or a scheduled task — narrowing the window for root cause analysis.
Data Analysts Working with Timestamps in Datasets
Databases and data warehouse exports frequently store time in Unix epoch columns for fields
like created_at and updated_at. Sanity-check epoch ranges here
before writing SQL queries or pipeline transforms to avoid off-by-one timezone bugs.
Students Learning Unix Time Concepts
Understanding epoch time is a foundational skill in computer science and backend development. Enter a date, see its epoch, and explore how seconds and milliseconds relate — building intuition for timestamp arithmetic that will serve you in any language.
Frequently Asked Questions
What is a unix timestamp epoch converter?
A unix timestamp epoch converter is a tool that translates Unix epoch time — the count of seconds (or milliseconds) since January 1, 1970 UTC — into a readable date and time, or converts a date back into its epoch value. Developers use it daily when working with APIs, databases, logs, and authentication tokens.
How do I convert a unix timestamp epoch to a date?
Paste your unix timestamp epoch value into the "Timestamp → Date" tab, choose your timezone, and click Convert. The tool automatically detects seconds (10 digits) or milliseconds (13 digits) and outputs the date in Local, UTC, ISO 8601, and relative formats instantly.
What is the difference between seconds and milliseconds in Unix time?
A seconds-based Unix timestamp is a 10-digit number (e.g. 1700000000). A milliseconds timestamp is 13 digits (e.g. 1700000000000). JavaScript's Date.now() returns milliseconds; Unix shell commands like date +%s return seconds. This converter auto-detects the format so you don't have to convert manually.
What is Unix epoch time and why does it start at 1970?
Unix epoch time counts the seconds elapsed since 00:00:00 UTC on January 1, 1970. Early Unix developers chose this date as a convenient starting point for time tracking. It simplifies date arithmetic — to find the difference between two timestamps, you just subtract. The standard has been adopted by virtually every modern OS and programming language.
Is this unix timestamp epoch converter free to use?
Yes, completely free with no account or signup required. Every conversion runs locally in your browser — no data is sent to any server. You can bookmark it and use it as many times as you like at no cost.