Unix Timestamp Converter

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Unix Timestamp Converter

Convert Unix seconds or milliseconds to UTC and local date/time.

Developer Generators workspaceGeneration and hashing stay in your browser. HTTPS is required for secure cryptography.

Privacy-focused processingBrowser processing is used wherever practical.
25-minute cleanup policyServer files, when required, are removed after completion—not during active work.
Text, pasted data or supported local filesMaximum size and exact support are shown inside the tool.

About This Tool

Convert Unix seconds or milliseconds to UTC and your browser-local date/time, and back.

How to Use

  1. Enter a timestamp and choose seconds or milliseconds, or pick a local date/time.
  2. Review UTC, local and Unix output.
  3. Copy or download the report.

Tool Features

  • Seconds and milliseconds
  • UTC and local time
  • Local date input
  • Copy/download report

Common Use Cases

Everyday work

Complete repetitive formatting or calculation tasks.

Publishing

Prepare clean output for websites and documents.

Local review

Inspect and verify your result before downloading.

Supported Input and Output

Text, pasted data or supported local files

  • Check the tool workspace for its exact file-size limit.
  • Browser format support can vary by device and browser version.
  • Always review the generated result before important use.

Frequently Asked Questions

Which timezone is used for local input?

Your browser timezone. UTC output always uses the UTC timezone.

Security and Privacy Information

Local first

Supported processing runs inside your browser whenever practical.

Temporary files

When server processing is required, cleanup starts only after the work completes.

Your responsibility

Avoid uploading confidential data unless you understand the displayed processing notice.