Developer Tools
Timestamp Converter
Convert Unix timestamps to UTC, local time, ISO 8601, and back.
Input / output
Detected: Unix seconds
Output formats
- UTC time
- 2027-01-01 00:00:00 UTC
- Local time
- 2027-01-01 00:00:00
- ISO 8601
- 2027-01-01T00:00:00.000Z
- Unix seconds
- 1798761600
Detected input
seconds
Unix seconds
1798761600
Unix milliseconds
1798761600000
UTC ISO
2027-01-01T00:00:00.000Z
Epoch scrubber
0dTimezone rail
Output formats
| Format | Value | Usage |
|---|---|---|
| ISO 8601 UTC | 2027-01-01T00:00:00.000Z | REST API, JSON payload, database timestamp |
| UTC string | Fri, 01 Jan 2027 00:00:00 GMT | HTTP header, log inspection |
| Unix seconds | 1798761600 | POSIX time, JWT exp, Redis TTL |
| Unix milliseconds | 1798761600000 | JavaScript Date, Date.now, browser logs |
| Unix microseconds | 1798761600000000 | API logs, tracing systems, database precision |
| Unix nanoseconds | 1798761600000000000 | High-resolution events, telemetry, distributed traces |
| KST | 2027-01-01 09:00:00 KST | 한국 운영 로그, 한국어 공유 문서 |
| Local (UTC) | 2027-01-01 00:00:00 | 현재 브라우저 환경 표시 |
Before using
- 숫자 길이로 seconds(10), milliseconds(13), microseconds(16), nanoseconds(19)를 자동 감지합니다.
- 저장은 UTC timestamp로 하고 화면 표시에서만 시간대를 변환하세요.
- DST와 과거 시간대 규칙은 실행 환경의 Intl/IANA 데이터에 따라 달라질 수 있습니다.
- 32-bit Unix time은 2038년 경계가 있으므로 장기 데이터는 64-bit timestamp를 사용하세요.
Batch conversion
| Line | Status | Detected input | Input | ISO 8601 UTC | Seconds |
|---|---|---|---|---|---|
| 1 | success | seconds | 1798761600 | 2027-01-01T00:00:00.000Z | 1798761600 |
Timezone compare
| Time zone | IANA | Offset | Local time |
|---|---|---|---|
| UTC | UTC | UTC+00:00 | 2027-01-01 00:00:00 |
| KST | Asia/Seoul | UTC+09:00 | 2027-01-01 09:00:00 |
| New York | America/New_York | UTC-05:00 | 2026-12-31 19:00:00 |
| London | Europe/London | UTC+00:00 | 2027-01-01 00:00:00 |
| Tokyo | Asia/Tokyo | UTC+09:00 | 2027-01-01 09:00:00 |
Tool usage summary
Use it to convert timestamp values from logs, JWT exp claims, API response times, and database fields into readable dates.
- Processing
- Timestamp and date inputs are converted with browser date APIs without server upload.
- Example
- Enter 1798761600 or 1798761600000 to run timestamp to date or milliseconds to date conversion in one browser view.
Quick answer summary
Timestamp Converter is a Unix timestamp converter and epoch time converter for seconds, milliseconds, ISO 8601, UTC time, and local time.
- When to use it
- Use it to convert timestamp values from logs, JWT exp claims, API response times, and database fields into readable dates.
- Processing
- Timestamp and date inputs are converted with browser date APIs without server upload.
- Example
- Enter 1798761600 or 1798761600000 to run timestamp to date or milliseconds to date conversion in one browser view.
HelpOpen usage notes, examples, practical tips, and FAQ only when you need them.
What is this tool?
Timestamp Converter is a Unix timestamp converter and epoch time converter for turning seconds, milliseconds, and ISO dates into readable UTC time and local time. It keeps timestamp to date checks in the browser so API logs, JWT claims, and database values can be reviewed without uploading values.
How to use it
- Paste a timestamp
Enter Unix seconds, milliseconds, or an ISO 8601 date value from a log, token, API response, or database field.
- Confirm the detected unit
Check whether the value is treated as seconds or milliseconds before copying the converted date.
- Compare UTC and local time
Read UTC time beside local time so backend events and user-facing dates stay aligned.
- Copy the needed format
Use the ISO, seconds, or milliseconds output that matches your next tool or documentation target.
Examples
Unix timestamp converter for API logs
- Input
- 1798761600
- Output
- Shows the matching UTC time, local time, ISO 8601 value, and seconds timestamp.
Milliseconds to date check
- Input
- 1798761600000
- Output
- Detects the millisecond timestamp and converts it to the same readable date.
Date to timestamp before a scheduled job
- Input
- 2027-01-01T00:00:00Z
- Output
- Returns seconds and milliseconds values so the job configuration uses the expected epoch time.
Practical tips
- A 10-digit value is usually Unix seconds; a 13-digit value is usually milliseconds.
- Epoch time converter results can differ by local time zone, so keep the UTC value in incident notes.
- JWT exp and iat values are commonly seconds, not milliseconds.
- When debugging a browser event, compare the local time with the server log time before changing code.
- Timestamp values are converted in the browser and are not sent to a server, analytics payload, or URL.
FAQ
How do I convert Unix timestamp to date?
Paste the Unix timestamp and check the UTC time, local time, ISO 8601 output, and seconds or milliseconds interpretation.
Can I convert date to timestamp too?
Yes. Enter an ISO date or readable date value to get seconds and milliseconds timestamp values for code, logs, or fixtures.
What if my milliseconds timestamp looks wrong?
Check whether the value has 13 digits. A milliseconds timestamp read as seconds can produce a date far in the future.
Can Timestamp Converter handle seconds and milliseconds?
Yes. Convert Unix seconds, milliseconds, and ISO 8601 dates while comparing UTC time, local time, and timestamp output.
Are timestamp values sent to a server?
No. Timestamp values are converted with browser date APIs and are not stored on a server.
Why compare UTC and local time together?
Logs, APIs, and databases often use UTC, so comparing local time helps line up incidents, scheduled jobs, and user-facing dates.
Can I use it as an epoch time converter?
Yes. Epoch seconds and milliseconds can be converted to readable dates, and date values can be converted back to timestamp formats.
