System Tools

Chmod Calculator

Visual permission calculator with checkboxes for owner/group/other. Bidirectional conversion between octal (755) and symbolic (-rwxr-xr-x) notation. Includes umask calculator and special permission bits.

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Cron Builder

Build cron expressions visually or parse existing ones. Human-readable explanations, next 10 execution times, and common preset library. Essential for scheduling tasks on Linux systems.

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DISK Tools

Comprehensive storage and RAID calculator. Calculate RAID capacity and rebuild times, convert disk space units, analyze disk usage percentages, and estimate IOPS performance for various disk types and RAID configurations.

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Password Generator

Generate secure random passwords with configurable length and complexity. Supports multiple policies (Active Directory, Linux PAM, custom), XKCD-style passphrases, and batch generation. Uses Web Crypto API for secure randomness.

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Regex Tester

Test regular expressions against multi-line text with real-time matching. Includes common network patterns for MAC addresses, IPs, VLANs, and interface names. View matches with highlighting or in list format.

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Log Timestamp Converter

Parse and convert log timestamps in batch mode. Auto-detects ISO8601, RFC3339, syslog, Windows Event Log, Apache/Nginx, and Unix formats. Convert to multiple timezones with CSV export.

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Certificate Parser

Parse and decode PEM certificates to view expiry dates, subject, issuer, and Subject Alternative Names (SANs). Parse existing CSRs or generate new Certificate Signing Requests with custom SANs.

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IOPS Calculator

Calculate storage IOPS for on-premises RAID arrays, AWS EBS, Azure Managed Disks, and Google Cloud Persistent Disks. Estimate read/write performance with RAID penalties and cloud provider limits.

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