Developer Utilities Tools
Regex, cron, diff, Unix permissions, JSONPath, and text utility tools for daily development. Runs in your browser. No data is sent to any server.
Regex Tester
Test regular expressions in real time with match highlighting and capture groups
Try it →Cron Expression Parser
Parse cron expressions into human-readable descriptions with next execution times
Try it →Text Diff Checker
Compare two texts and highlight differences
Try it →Unix Permissions Converter
Convert between chmod numeric (755) and symbolic (rwxr-xr-x) notation
Try it →JSONPath Tester
Evaluate JSONPath expressions against JSON data and extract matching values
Try it →What You Can Do with Developer Utilities
- Test regular expressions in real time and inspect matches and capture groups
- Convert cron expressions into human-readable schedules
- Diff two texts and highlight changes side by side
- Generate dummy data such as Lorem Ipsum or random strings for testing
About This Category
Regex, cron, diff, Unix permissions, JSONPath, and text utility tools for daily development.
All tools run in your browser and your input is not sent to any server.
FAQ
Can I set regex flags like g, i, and m?
Yes. Global (g), case-insensitive (i), multiline (m), and other common flags are toggleable in the UI.
What is the difference between 5-field and 6-field cron expressions?
5-field is standard Unix cron (minute hour day month weekday). 6-field adds a seconds field at the start (used by Spring, Quartz, etc.).
Is my data sent to a server?
No. Everything runs locally in your browser and nothing is uploaded.