Free alternative to epochconverter.com
Looking for a free alternative to epochconverter.com? The Tools Nimbus Unix Timestamp Converter is a free, no-signup tool that converts epoch seconds or milliseconds into UTC and local dates instantly, and back again. Tools Nimbus is a free, no-signup developer toolkit that runs entirely in your browser, so your data is never uploaded to a server. The honest differences are a cleaner single-screen layout, no clutter, and a set of related developer utilities beside it.
Last updated June 2026
The short version
epochconverter.com is the best-known Unix timestamp tool for a reason: it converts in both directions, handles seconds through nanoseconds, offers batch conversion and a time zone converter, and ships code snippets for more than twenty languages. We are not going to pretend it is anything but excellent. If your everyday need is simply reading one timestamp as a date, or turning a date into epoch seconds and milliseconds, the Tools Nimbus Unix Timestamp Converter does that on a single clean screen with no account and no surrounding clutter. If you need batch lists, arbitrary named time zones, or sub-millisecond precision, epochconverter.com is still the better pick, because Tools Nimbus deliberately keeps the converter small.
Feature comparison
The table below compares the two free web tools. A check means the capability is present, a dash means it is absent, and partial means it exists with a caveat. Pricing is marked as of 2026.
| Capability | Tools Nimbus Unix Timestamp Converter | epochconverter.com |
|---|---|---|
| Price (as of 2026) | Free, $0 | Free, $0 |
| Account or signup required | No | No |
| Epoch to date (seconds and milliseconds) | Yes | Yes |
| Date to epoch timestamp | Yes | Yes |
| Shows UTC and local time together | Yes | Yes |
| Microsecond and nanosecond units | No | Yes |
| Batch conversion of many timestamps | No | Yes |
| Convert to arbitrary named time zones | No (UTC and your local only) | Yes |
| Programming language code snippets | No | Yes (20+ languages) |
| Specialty formats (LDAP, GPS, Excel, Julian) | No | Yes |
| Processing happens in your browser | Yes | Yes (single conversions client-side) |
| Keeps working offline after first load | Yes | Partial (not advertised) |
| Single-screen, no-clutter layout | Yes | Partial (dense, many sub-tools) |
| Sits beside other browser-based dev tools | Yes | Partial (timestamp focused) |
Where Tools Nimbus is genuinely different
Both tools are free, both skip the signup, and both do single conversions in your browser, so the honest differences are narrower than marketing lines and worth stating plainly.
- One uncluttered screen. The Tools Nimbus converter is a single page with two boxes: timestamp to date, and date to timestamp. There are no surrounding reference tables, language tabs, or extra sub-tools competing for attention, which is faster when you only need one answer.
- Works offline once loaded. Because all conversion logic ships to the browser and there is no server round trip, you can keep converting after you lose your connection. epochconverter.com does not advertise offline use.
- Lives next to your other tools. The converter sits beside a JWT Decoder and a JSON Formatter, which is handy because the timestamps you are debugging usually arrive inside a JWT claim or a JSON field.
Where epochconverter.com is still the better pick
A fair comparison cuts both ways. epochconverter.com does several things the Tools Nimbus converter deliberately does not, and if you need any of them, it is the right tool:
- Batch conversion. epochconverter.com can convert a whole list of timestamps at once. Tools Nimbus converts one value at a time.
- Named time zones. epochconverter.com has a dedicated time zone converter for zones such as America/New_York or Europe/London. Tools Nimbus shows only UTC and your own local time.
- Sub-millisecond units and code snippets. epochconverter.com handles microseconds and nanoseconds and prints ready-to-copy conversion code for more than twenty languages. Tools Nimbus stops at seconds and milliseconds and writes no code for you.
How to convert a timestamp with Tools Nimbus
Open the Unix Timestamp Converter and paste your epoch value into the top box. Use the seconds and milliseconds toggle so a 10-digit value is read as seconds and a 13-digit value as milliseconds, then read the matching UTC and local date side by side. To go the other way, pick a date and time in the lower box and the tool shows both the epoch seconds and the epoch milliseconds at once. The Now button drops in the current timestamp so you can sanity-check a value against the present moment. Nothing you enter is uploaded anywhere.
Seconds versus milliseconds, the usual gotcha
The most common timestamp mistake is mixing units. A Unix timestamp in seconds is the number of seconds since 1 January 1970 UTC and is usually ten digits today, while a millisecond timestamp, the kind JavaScript returns from Date.now(), is thirteen digits. Feed a millisecond value into a tool expecting seconds and you land roughly fifty thousand years in the future. The seconds and milliseconds toggle exists precisely to avoid that, and reading the result as both UTC and local time helps you catch a value that looks wrong because of a time zone offset rather than a unit mistake. When a timestamp comes from a token, decode it first with the JWT Decoder, whose exp and iat claims are themselves Unix seconds.
Related browser-based tools
Timestamps rarely travel alone. The JSON Formatter pretty-prints the payloads those epoch fields live in, and the JWT Decoder turns a token's exp and iat seconds into something you can read. For more comparisons, see our guides index, including our free alternative to jwt.io write-up. Everything runs locally, so your data never leaves your device.