Convert Unix Timestamps
Current Unix time (seconds)
…
Timestamp to date
Date to timestamp
Turn 1735689600 into a date you can read, in your own time zone and in UTC, or get the timestamp for a date. Seconds and milliseconds are told apart automatically.
- Free
- Runs in your browser
- Seconds or milliseconds
- No sign-up
How It Works
Convert in three steps.
Paste a timestamp
From a log, a database row, an API response or a JWT.
Read the date
See it in your local time, UTC, ISO 8601 and relative to now.
Or go the other way
Pick a date and time to get its timestamp in seconds and milliseconds.
What is a Unix timestamp?
Unix time counts the seconds since 00:00:00 UTC on 1 January 1970, ignoring leap seconds. It is a single number with no time zone, which is why databases, logs and APIs use it. JavaScript and Java often use milliseconds instead, giving a 13-digit number rather than 10 digits. Mixing the two up puts a date in 1970 or tens of thousands of years in the future.
Systems that store Unix time in a signed 32-bit integer overflow on 19 January 2038 at 03:14:07 UTC. Modern systems use 64-bit values, but old embedded devices and file formats can still be affected.
Auto-detects the unit
Values of 100 billion or more are read as milliseconds, smaller ones as seconds. You can force either.
Your time zone and UTC
The same moment shown in the time zone your device uses and in UTC.
ISO 8601
The 2025-01-01T00:00:00.000Z format used by JSON APIs and JavaScript's toISOString().
Local or UTC input
When converting a date, choose whether the time you enter is local or UTC.
Convert PDF Files and File Formats
Find the perfect online tool to combine PDF files, compress documents, and handle your daily workflow effortlessly.
PDF Tools
All your PDF needs in one place
- Merge PDF
- Organize PDF
- Split PDF
- Compress PDF
- Convert to Word
- Convert to Image
Image Tools
Edit and optimize your images
- Resize Image
- Compress Image
- Convert Format
- Crop Image
- Add Watermark
- Remove Background
Word Tools
Work with Word documents
- Convert to PDF
- Merge Documents
- Split Documents
- Compress File
- Edit Text
- Add Watermark
Excel Tools
Process Excel spreadsheets
- Convert to PDF
- Convert to CSV
- Merge Sheets
- Split Sheets
- Compress File
- Clean Data
Why Use This Converter
Both directions on one page.
Live clock
The current Unix time ticks at the top, ready to copy.
No unit guessing
Seconds and milliseconds are detected for you.
Time zone aware
Uses your device's time zone, so the local result matches your clock.
Private
Everything is calculated in your browser.
Frequently Asked Questions
Questions people ask about the Unix Timestamp Converter.
Count the digits. Current timestamps in seconds have 10 digits; in milliseconds they have 13. Auto mode does this for you.
No. A timestamp marks one moment for everyone. The time zone only matters when you display it, which is why the tool shows both local time and UTC.
Yes. Negative values are dates before 1970: -86400 is 31 December 1969 at 00:00 UTC.
Unix time ignores them; every day has exactly 86,400 seconds. That keeps the arithmetic simple and is how operating systems and programming languages treat it.
Related Text & Developer Tools
More small utilities that run in your browser.
Cron Expression Parser
Explain a cron schedule in plain English and list the next runs.
Time Zone Converter
Convert a date and time between time zones.
JWT Decoder
Read the header and payload of a JSON Web Token.
Number Base Converter
Convert between binary, octal, decimal and hex.
UUID Generator
Generate random version 4 UUIDs in bulk.