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Page Utils

Timestamp to Date

A Unix timestamp is seconds or milliseconds since 1970-01-01 UTC. Timestamp to date means turning that number into a readable UTC or local datetime, or parsing an ISO string back to Unix. Paste a value here to convert in your browser (under 1×10¹² as seconds; larger as milliseconds). Nothing is uploaded. Not a remote epoch API or TZDB editor.

Updated

Paste a Unix timestamp or an ISO / common date string — or press Load example. The tab detects seconds vs milliseconds, then shows UTC, browser-local time, ISO-8601, and both Unix units. Copy exports the full bundle. Closing the tab clears the field; nothing is uploaded or written to localStorage.

Unit detection is a simple magnitude rule used by many epoch converters: values whose absolute size is below 1×10¹² are treated as seconds; larger values as milliseconds. Date strings use the browser's Date.parse rules. This is not a claim that every locale format parses the same everywhere, and it is not a TZDB editor for historical offsets.

Timestamp to Date workspace

Unix ↔ date

Paste a Unix timestamp (seconds or milliseconds) or an ISO / common date string. Detection is local — nothing is uploaded.

Converted result

Paste a Unix timestamp or date string above, or press Load example. Absolute values under 1×10¹² are treated as seconds; larger values as milliseconds.

Pure Date math in this tab — not a remote epoch API, not a timezone database editor, and not a claim that every locale string parses the same in every browser. Closing the tab clears the field; nothing is written to localStorage.

How does the Timestamp to Date work?

  1. 1. Paste a timestamp or date

    Enter Unix seconds, Unix milliseconds, or an ISO / common date string. Load example fills 1704067200 (2024-01-01 UTC).

  2. 2. Detect unit locally

    The tab treats absolute values under 1×10¹² as seconds and larger values as milliseconds. Date strings use Date.parse. Nothing is uploaded.

  3. 3. Read UTC, local, and ISO

    See Unix seconds, Unix milliseconds, UTC, browser-local time, and ISO-8601. Values stay in React state for this tab only.

  4. 4. Copy the result

    Copy exports the full conversion bundle. Closing the tab drops the field. Need a line compare instead? Use Code Diff on this hub.

Questions about Timestamp to Date

What does this Timestamp to Date converter do?
It converts Unix epoch seconds or milliseconds into human-readable UTC and local datetimes, and can parse common ISO / date strings back into Unix values. You get both units, ISO-8601, UTC, and browser-local time. Everything runs in your browser — no signup and no upload.
Does it upload my timestamp?
No. Conversion is pure in-page Date math. There is no account, no server-side epoch API, and no file upload. Values stay in this tab until you clear them or close the page. We do not write timestamps to localStorage or send them to a remote converter.
How does it decide seconds vs milliseconds?
Honest magnitude detection: if the absolute value is below 1×10¹², the input is treated as Unix seconds; otherwise as Unix milliseconds. That matches common epoch-converter practice around today's ~1.7×10⁹ second and ~1.7×10¹² millisecond ranges. You can always compare both output rows.
Why is there no /unix-timestamp-converter/ or /epoch-converter/ second URL?
One canonical address with a trailing slash: /developer/timestamp-to-date/. Queries like "timestamp to date", "unix timestamp to date", or "epoch converter" can land here. We do not publish stub alias slugs that would split the address people and search engines should share, and we do not leave empty converter URLs that 404.
Does it handle timezones?
UTC and ISO-8601 are timezone-agnostic displays. Local time uses your browser's current timezone offset. The page does not let you pick an arbitrary IANA zone or edit the TZDB. For zone-specific historical offsets, use a dedicated timezone library or CLI.
How is this different from Code Diff on this hub?
Code Diff compares two text pastes with a line-oriented LCS. Timestamp to Date converts epoch numbers and date strings. They share the same privacy rule (local only) but solve different jobs — this page does not diff text, and Code Diff does not convert timestamps.
Can it convert a date string back to Unix?
Yes. Paste an ISO-8601 string (for example 2024-01-01T00:00:00.000Z) or another string Date.parse accepts, and the result shows Unix seconds and milliseconds alongside UTC and local. Ambiguous locale formats may differ by browser — prefer ISO when you need a shared answer.
How do I convert a Unix timestamp to a date in JavaScript?
Use Date with milliseconds: new Date(ts) when ts is ms, or new Date(ts * 1000) when ts is seconds, then call toISOString() for UTC or toString() for local. There is no Date.fromUnix in the language. Paste a value here to check both units and formats; keep production parsing in your own code.
Is anything stored in localStorage?
No. The input field lives in React state for this tab only. Closing the tab clears it, and we do not mirror timestamps into localStorage or cookies. Hosting logs may show that you requested the page URL, not the values you typed.

What else can I open?

These tools run in your browser. Page Utils does not store, upload, or write to localStorage the keys, tokens, or text you paste. Results are a convenience aid, not legal, tax, or security advice.