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Free developer tools
Six tools every developer and network engineer needs, running right in your browser.
Everything runs on your device: your text and passwords are never sent to a server.
JSON formatter and validator
Paste JSON to format, minify or validate it. Errors are explained.
Regex tester
Type a pattern and some text: matches and capture groups appear instantly, highlighted.
Password generator
Random passwords generated in your browser with the secure crypto random generator.
Base64 encoder and decoder
Supports Arabic text (UTF-8) and the URL-safe variant.
Cron expression explainer
Enter a five-field cron expression to see what each field means and the next run times in your device's time zone.
IPv4 subnet calculator
Enter an address with its prefix, like 192.168.1.10/24, to get the network, broadcast and host range.