Disclosure: I contribute to OpenNomos, the ecosystem behind this project.

There are hundreds of online dev tools out there. JSON formatters. Timestamp converters. URL encoders. Regex testers. Most of them are single-purpose, ad-riddled, and forgettable.

json.opennomos.com is different. It's a clean, two-in-one toolkit that handles the two things I do most often:

Timestamp Converter

Auto-detects seconds vs milliseconds. Two-way conversion between timestamp and human-readable time. Respects your local timezone. No dropdowns, no "select your format" nonsense — paste a number and it just works.