Developer utilities

Everyday browser tools

Small, private utilities for timestamps, encodings, schedules, and test data.

QuickTools

Epoch timestamp → date

Seconds or milliseconds

Unix timestamp

Enter a timestamp to see the local and UTC date.

URL encoder / decoder

URIComponent

Text or URL

Result

Base64 encoder / decoder

UTF-8 safe

Text

Result

CRON expression generator

Minute · hour · day · month · weekday

Minute

Hour

Day

Month

Weekday

* * * * *

Runs every minute.

CRON expression explainer

Standard 5-field syntax · local time

Expression

Next five runs

Enter an expression to calculate upcoming runs.

Supports numbers, *, lists, ranges, steps, and JAN–DEC / SUN–SAT names. The calculator uses your browser’s local timezone.