About Timestamp Converter

Timestamp Converter is an independent developer tool that converts between Unix epoch seconds, Unix milliseconds, ISO 8601, RFC 2822, human-readable formats, and 40+ timezones - all in your browser, with no account, no tracking, and no server round-trips for the actual conversion.

Why this site exists

If you have ever debugged a backend bug, looked at a JSON payload from a third-party API, or stared at a row in a database, you have probably had this exact moment: you see 1706745600 in a log line, you need to know what date that is, and you tab over to whatever Unix-timestamp-converter happens to be your default. Then you realize that page wants to give you the date in three formats but not the one your service uses, the timezone is wrong, the design is from 2009, there are five ad units fighting for your attention, and you still need a separate tool for the cron expression in the next ticket.

Timestamp Converter was built to be the tool that does all of those things in one tab, fast, with no fluff, and with reference pages dense enough to be useful when you bookmark them. Auto-detection of input format means you do not click radio buttons. Output of every common format simultaneously means you copy whichever one fits. The reference section covers every timezone, every common cron schedule, every year from 1970 to 2050, every calendar date, every common "X days from today" question, and how to do these things in Python, JavaScript, PHP, Java, Go, Ruby, Rust, C#, and SQL.

Who runs the site

Timestamp Converter is built and maintained by Ravi, an independent developer who has been writing software professionally for over a decade across backend, infrastructure, and web work. The site is a single-maintainer project; there is no parent company, no ad-tech investor pressure, and no "growth team." That is intentional - the goal is to keep the tool fast, ad-light, and useful long after every venture-backed converter site has pivoted to chasing some other market.

The same maintainer also runs JSON Difference, a similarly minimal tool for diffing JSON files, in the same spirit: developer tools should respect your time and your bandwidth.

How it is built

The interactive parts of the site are vanilla HTML, CSS, and JavaScript with one external dependency: day.js, a 2 KB date library that handles timezones and DST correctly. There is no React framework, no build pipeline for the home page, no analytics SDK, and no server-side conversion endpoint. When you paste a timestamp, the work happens in your browser; the result never crosses the network.

The reference pages (over a thousand of them - per timezone, per year, per calendar day, per cron expression, per language, per "days between" pair) are static HTML, generated at build time by a small Node script and served as flat files from Cloudflare's edge network. That keeps the site fast everywhere in the world and means there is no database to misconfigure.

The full source approach is intentionally boring. Boring scales; clever doesn't.

What you can rely on

• The math is correct. Conversions use day.js with the IANA timezone database, the same data used by your operating system. DST transitions, leap years, and historical timezone changes are handled correctly.
• The pages are fast. Each page is a static file, served from Cloudflare's CDN, with no render-blocking analytics or ad scripts above the fold.
• The site stays. Hosting and the domain together cost less than a sandwich per month. Even if the maintainer disappeared tomorrow, the site would keep working until the domain renewal lapsed - which would not happen quietly.
• Your data is yours. No accounts, no server-side history, no analytics tracking individual visitors. See the Privacy Policy for the full breakdown.

Suggestions, corrections, and bug reports

If something is wrong, slow, or confusing - a bad conversion, a broken link, a timezone abbreviation that has been deprecated - please reach out via the Contact page. Real feedback from working developers is the single best signal for what to fix next, and corrections always get priority over new features.

Editorial standards

All explanatory prose on this site is written by the maintainer, not generated and pasted from an LLM. Code samples are tested against the documented input. When the site says "as of build time" or "computed when this page was built," that means the value was generated by the build script that produced the page; values that depend on the current date are clearly labeled as such.

If a page contains an error, the correction date will be reflected in a "Last updated" line at the top of the page when the issue affects the documented facts (rather than just typography).