What is a Unix timestamp?

A single integer counting seconds since 1 January 1970 00:00:00 UTC — the most portable, zone-independent way to store an instant.

Does the converter run on a server?

No. Every conversion happens locally in your browser — nothing is uploaded.

How do I tell seconds from milliseconds?

Seconds are ~10 digits, milliseconds ~13, microseconds ~16, nanoseconds ~19. The converter auto-detects the unit, and you can override it.

Epoch Converter

The Epoch Converter turns Unix timestamps into human-readable dates and back. Unix time counts the seconds since 1 January 1970 UTC, which makes it compact, sortable and free of timezone ambiguity — the reason almost every database, API and log stores time this way.

Why use Epoch Converter

Auto-detects seconds, milliseconds, microseconds and nanoseconds.
Shows UTC, your local time, ISO 8601, RFC 2822 and relative time at once.
Decodes JWTs, JSON payloads and log lines, and parses natural language like “next friday 5pm”.
Runs entirely in your browser — nothing is uploaded.

How to use Epoch Converter

1Paste a value. Paste a Unix timestamp, ISO date, JWT or log line into the input — or pick a date with the picker.
2Read every format. Instantly see UTC, local, ISO 8601, RFC and relative time, plus seconds and milliseconds.
3Copy what you need. Click any value to copy it, or grab a code snippet in your language.

Frequently asked questions

What is a Unix timestamp?: A single integer counting seconds since 1 January 1970 00:00:00 UTC — the most portable, zone-independent way to store an instant.
Does the converter run on a server?: No. Every conversion happens locally in your browser — nothing is uploaded.
How do I tell seconds from milliseconds?: Seconds are ~10 digits, milliseconds ~13, microseconds ~16, nanoseconds ~19. The converter auto-detects the unit, and you can override it.

Developer notes

Timestamps are absolute instants; only their calendar representation depends on a timezone. Store and compare in UTC seconds, and format to a zone only at display time.

JSON Formatter

Pretty-print, minify, validate & explore JSON.

Regex Tester

Test patterns live with match highlighting & groups.

Base64 Encoder

Encode and decode Base64 text and files, UTF-8 safe.

Diff Checker

Compare two texts line by line, side-by-side or unified.

Cron Parser

Explain cron expressions & preview next runs.