Timestamp Converter

• 100% Free

  Core tools stay free with no paywall to unlock basics.

• No Registration Required

  Open a tool and start immediately - no account needed.

• Privacy First

  We avoid unnecessary collection and keep processing local when possible.

• Browser Processing

  Most tools run in your browser so your input never needs a server round-trip.

• Fast & Secure

  HTTPS everywhere with instant, client-side results for everyday tasks.

• Mobile Friendly

  Layouts and controls are built for phones, tablets, and desktops.

• Updated Regularly

  Tools and content are improved continuously as the platform grows.

Key Features

• Auto-detect common formats

  Paste Unix seconds, milliseconds, ISO 8601 strings, or Date.parse-compatible dates and get instant conversions.

• Seconds or milliseconds control

  Use auto-detect for typical lengths, or force seconds or milliseconds when a numeric value is ambiguous.

• Rich output summary

  See Unix time, ISO UTC, local locale string, relative time, day of week, week number, and timezone offset in one view.

How to Use

1. 1

   Paste a timestamp or date

   Enter a Unix epoch value, ISO string, or readable date from logs, APIs, databases, or JWT claims.

2. 2

   Choose unit handling

   Keep auto-detect for most cases, or force seconds or milliseconds when you know how the source encodes time.

3. 3

   Copy or export results

   Review UTC and local outputs, then copy or download a full conversion report for tickets and documentation.

Use Cases

• Debugging backend log timestamps

  Paste a raw epoch value from a server log to instantly see the corresponding UTC and local date and time.

• Verifying JWT expiration claims

  Convert a token’s iat or exp claim to a readable date to confirm exactly when it was issued or will expire.

• Reconciling timestamps across timezones

  Compare the UTC and local representations of an event to resolve confusion during an incident review or support ticket.

• Documenting timestamps for a report

  Convert several ambiguous numeric timestamps into a shared, readable format before including them in documentation.

Examples

1705314600

2024-01-15T10:30:00.000Z · Monday · relative time from now

2024-01-15T10:30:00Z

Unix seconds: 1705314600 · Unix milliseconds: 1705314600000

1705312200 with force milliseconds

1970-01-20T17:41:52.200Z with forced millisecond interpretation

Benefits

• ✓Debug API and database timestamps without leaving the browser
• ✓Compare UTC and local representations side by side
• ✓Quickly sanity-check JWT iat and exp claim values
• ✓Share a readable conversion report with teammates
• ✓Keep sensitive log timestamps on your device

Best Practices

• Confirm whether your source uses seconds or milliseconds before forcing a unit - many JavaScript APIs use milliseconds while Unix logs often use seconds.
• Prefer ISO 8601 with an explicit Z or offset when storing or exchanging timestamps across timezones.
• Use UTC fields for server-side comparisons and local fields when validating what end users should see.
• Pair this tool with the JWT Decoder when inspecting token timing claims in full context.

Common Mistakes

• Treating a 13-digit millisecond value as seconds, which produces a date far in the future.
• Assuming a locale date string will parse the same way in every environment.
• Forgetting that Unix time is UTC-based even when the local string shows a different calendar day.
• Using relative time for audit trails instead of a fixed ISO or epoch value.

Privacy Notice

All conversion logic runs in your browser using built-in Date APIs. ToolMint does not upload, store, or transmit the timestamps or date strings you paste. After the page has loaded, you can continue converting offline.

About This Tool

Frequently Asked Questions

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