Tools
Free, browser-based utilities, no signup required. Pick a tool and get started.
Test keyboard events with live key details, layout progress, shortcut capture, and copyable key history.
Beautify, validate, and minify JSON with syntax highlighting.
Compare text online, find line differences, ignore case or whitespace, and copy or download the diff.
Decode cron schedules into plain English with a field-by-field breakdown.
Generate random UUID v4 and v1 identifiers instantly.
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.
Write Markdown and preview rendered output or HTML source live in your browser.
Build campaign tracking URLs with utm_source, utm_medium, utm_campaign, and more.
Check whether GPTBot, ClaudeBot, PerplexityBot, Google-Extended, and other AI crawlers can access a page, and which robots.txt rule decides it.
Score a page out of 100 for AI search readiness (crawler access, indexability, readable HTML, structure, citations, and schema) with prioritized fixes.
Convert IPv4 addresses, calculate CIDR subnets, and expand or compress IPv6 with live results.
Generate TypeScript types from JSON with nested objects, arrays, and unions. Copy or download a .ts file.
Decode and inspect a JSON Web Token’s header and payload, with expiry times in human-readable form.
Check a URL’s Open Graph and Twitter Card tags, see what’s missing, and preview how it looks when shared on Facebook, X, and Google.
Build and debug regular expressions with live match highlighting, capture groups, and flag toggles.
Inspect URL components and decoded query parameters, including repeated keys, without opening the address.