IT & Security Tools
Free, browser-based tools for IT professionals and security enthusiasts. No data leaves your browser - everything runs locally.
All tools
Subnet Calculator
Calculate IP subnets, CIDR ranges, and network masks. Supports IPv4 with visual bit breakdown.
Instant CIDR breakdowns with visual bit maps
Password Generator
Generate secure, random passwords with customizable complexity settings.
Cryptographically secure with entropy scoring
Base64 Encoder/Decoder
Encode and decode Base64 strings. Supports text and file encoding.
Hash Generator
Generate MD5, SHA-1, SHA-256, and other cryptographic hashes.
JWT Debugger
Decode, verify, and debug JSON Web Tokens without sending data to servers.
Client-side only - your tokens never leave the browser
DNS Lookup
Perform DNS lookups for A, AAAA, MX, TXT, NS, and other record types.
Powered by Cloudflare DNS-over-HTTPS
Invoice Generator
Create professional invoices with live preview. Add line items, tax, discounts, and print or save as PDF.
Professional invoices entirely in the browser
Text Diff
Compare two texts side-by-side with line-level and word-level diff highlighting.
LCS-based diff algorithm with instant results
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We're always looking to build useful tools for the community. Let us know what tools would help your workflow.
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