Time & numbers
Timestamp to date
Turn Unix timestamps into ISO, local, and UTC human-readable times.
Logs, JWTs, and APIs often use Unix time (seconds or milliseconds since 1970-01-01 UTC). Paste a number and compare seconds vs milliseconds—values large enough to be ms are detected automatically—then read the same instant in ISO and local time for debugging.
Similar tools
Quick links to related utilities—same workflow, different input or output.
- Time & numbersNumber base changerConvert whole numbers between binary, octal, decimal, and hexadecimal.Open
- Data formatsJSON formatterPretty-print or minify JSON for debugging, reviews, and smaller payloads.Open
- Text & devRegex testerRun JavaScript `RegExp` patterns against sample text and inspect matches.Open
FAQs
Seconds or milliseconds?›
Values at or above 1e12 are treated as milliseconds; smaller values as seconds—matching common API conventions.
What about time zones?›
UTC and ISO strings are shown explicitly; your browser’s local timezone appears in the local line.
Why does my date look wrong?›
Double-check whether the source used seconds, milliseconds, or microseconds. Microseconds need dividing before paste.
General
Do these tools send my data to Exemplar’s servers?›
By default, conversion and formatting run entirely in your browser. Nothing is uploaded to Exemplar for normal paste-and-transform workflows. Tools that deliberately open an external service (for example, a third-party speed test) are called out on the page.
Do I need an account or install anything?›
No account is required. Everything runs in the browser—there is nothing to install for these utilities. They complement the Exemplar platform but work standalone.
Are these utilities open-source or the same as other sites?›
These pages are built for Exemplar’s audience (developers working with APIs, config, and ops data). Behavior may differ slightly from other online tools; always verify critical output in your own environment.
Are there size or performance limits?›
Very large inputs can slow down or crash the tab—especially for images, huge JSON, or multi‑MB HAR files. For production-scale data, prefer local CLI tools, streaming parsers, or your own pipelines.
Can I use output in production?›
Yes, when you have validated it. Parsers and formatters here aim to be helpful for everyday tasks but are not a substitute for tests, schema validation, or security review where it matters.
Where can I read more about privacy?›
See our Privacy policy at /privacy for how exemplar.dev handles site analytics and general data practices.