ISO8601 Date Converter Online – DenCode
Posted by jpluimers on 2026/03/19
A while ago, I needed to check if 20251120T0700Z was a valid ISO 8601 timestamp. [Archive] ISO8601 Date Converter Online – DenCode showed it was.
It can even be called directly: [Archive] ISO8601 Date Converter Online – DenCode: 20251120T0700Z Europe/Amsterdam .
Not sure what language it was developed in (it runs server side), but it is a great tool to do some occasional testing of timestamp values.
Query: [Archive] datetime parse iso 8601 online at DuckDuckGo
I didn’t have time to check all the links from the Query in depth, but one seems to be JavaScript and another one is server side:
- [Archive] Date Time Format Converter Online – DTFormat.com | ISO 8601, RFC 3339, UNIX Timestamp also runs server side and also as a direct link feature: [Archive] 20251120T0700Z – DTFormat.com | Convert Thu, 20 Nov 2025 07:00:00 to ISO 8601, RFC 3339, UNIX Timestamp
- Client side JavaScript implementation that is very convoluted (it looks like it uses frameworks inside frameworks with a functional programming based approach which is hard to debug, especially since the code is obfuscated): ISO 8601 & RFC Date Format Converter – Free Online Tool
--jeroen
The Wiert Corner - irregular stream of stuff 
Leave a comment