If you've ever worked with logs, APIs, or databases, you know the drill: you're staring at a number like 1735689600 and you need to know what date that actually is — right now, not after signing up for something.
I got tired of the usual options: sketchy ad-heavy sites, tools that quietly send your data to a server, or switching to a Python shell just to run datetime.fromtimestamp(). So I added a Timestamp Converter to samtoolkit.com — one of ~30 browser-based developer utilities on the site, all running entirely client-side.
What it does
- Converts Unix timestamps (seconds or milliseconds) to human-readable dates and back
- Supports UTC and local timezone views side by side
- Handles common formats developers actually deal with — ISO 8601, RFC 2822, epoch
- Live "current timestamp" ticker so you can grab "now" instantly
- No sign-up, no API calls, no data leaving your browser
Why client-side matters here
Timestamps often show up next to sensitive context — user IDs, order numbers, log lines you shouldn't be pasting into a random third-party server. Since samtoolkit.com tools are built with Blazor WebAssembly, the conversion logic runs entirely in your browser. Nothing you type is ever sent anywhere. You could unplug your ethernet cable mid-conversion and it would keep working.
This is the same philosophy behind the rest of the toolkit — JSON formatters, base64 encoders, regex testers, and now this — all "nothing leaves your browser" by design.
Try it
👉 Timestamp Converter on samtoolkit.com
It's free, has no ads blocking the actual tool, and works offline once loaded. If you run into an edge case it doesn't handle well, I'd genuinely like to hear about it in the comments — most tools on the site started as exactly that kind of feedback.
samtoolkit.com is a growing collection of privacy-first developer tools — no tracking, no accounts, everything runs in your browser.
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