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Timestamp Converter

Click Run to generate (uses default if input is empty). Use Sample then Run to see an example.

Output

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Timestamp Converter — Unix to Date Online Free

Convert between Unix timestamps and human-readable dates. Enter a timestamp (ms or sec), a date string, or leave empty for "now".

Convert Unix timestamps (seconds or milliseconds) to ISO and local dates, or paste a date to get the timestamp.

Paste or type your input into the editor on the left panel.
Results update automatically while you type. You can also press Ctrl+Enter to force a refresh.
View the result in the output panel on the right with full syntax highlighting.
Use Copy or Download to export the result.
Drag and drop .json or .txt files directly into the editor.

1640000000000

ISO: 2021-12-20T...

100% client-side — your data never leaves your browser. No server processing, no data collection.
No sign-up required — start using the tool instantly with no registration or installation.
Keyboard shortcuts — press Ctrl+Enter to run, ? for shortcuts list, Ctrl+B to toggle sidebar.
Persistent state — your input is automatically saved across sessions using local storage.
IDE-style interface — Monaco Editor (the engine behind VS Code) with syntax highlighting and error detection.
Multi-format conversion — convert between JSON, XML, CSV, and YAML without switching tools.

Numbers are treated as milliseconds if > 10^12, otherwise seconds. Leave empty for current time.

Paste your data into the editor above for instant processing. Use Ctrl+Enter anytime to re-run quickly.