Every time I needed to validate a cron expression I ended up on some ancient, ad-covered website.
So I built a clean alternative.
What it does:
→ Explains any cron in plain English
→ Shows next 8 run times in your timezone
→ Validates syntax with clear error messages
→ Field-by-field breakdown
Also added JSON formatter, JWT decoder, Base64 encoder, timestamp converter and URL encoder.
Everything runs in your browser. Zero signup. Zero tracking. Zero server calls.
Built with pure HTML and vanilla JavaScript. No frameworks. No build pipeline.
Happy to answer any questions about how I built it.