Unix Timestamp Converter
Convert Unix epoch seconds or milliseconds to ISO 8601, RFC3339, UTC, and local time with copy-ready timestamp fields.
Current Unix timestamp
1779169719
Epoch seconds
Milliseconds
1779169719539
JavaScript Date.now() format
UTC time
2026-05-19T05:48:39.539Z
ISO 8601 output
Display mode
Toggle RFC3339 output and previews between local timezone and UTC.
Unix epoch (seconds)
e.g. 1735689600
Unix epoch (milliseconds)
e.g. 1735689600000
ISO 8601
Always UTC
RFC3339
Local offset
Tue, May 19, 2026, 5:48:39 AM UTC
Tue, May 19, 2026, 5:48:39 AM UTC
Unix timestamp converter for logs and APIs
Logs, APIs, cron jobs, and AI agents all swap between Unix epoch, ISO 8601, and RFC3339. This tool keeps everything in sync with a single canonical timestamp you can share or deep link.
Supported timestamp formats
- Unix epoch seconds, the compact timestamp format common in API payloads and database exports.
- Unix epoch milliseconds, the format returned by JavaScript
Date.now(). - ISO 8601 and RFC3339 strings for UTC, logs, webhooks, and system-to-system handoffs.
Shareable tips
- Link QA tickets with exact timestamps via URLs like
/time/timestamp?iso=2024-11-01T12:34:56Z. - Switch to UTC before copying RFC3339 for APIs that reject local offsets.
- Use the millisecond field to match JavaScript
Date.now()outputs instantly, then drop the value into the timezone converter if you need to share it in a teammate's local time. - Plot intervals faster by combining this tool with the duration calculator whenever you're auditing SLAs or retention windows.