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Showing 14 tools in Priority 3.
Generate QR codes and common barcode formats in-browser with live preview, presets, and downloads.
Check sitemap.xml availability, detect sitemap index files, and list discovered URLs.
Fetch robots.txt, view raw directives, and extract sitemap references for diagnostics.
Create linear and radial CSS gradients with live preview and copy-ready output.
Generate CSS box-shadow values with interactive controls and live preview.
Build border-radius CSS for uniform or per-corner rounded shapes with live preview.
Parse raw HTTP header text into structured key-value JSON output.
Generate cron expressions from common schedule options like daily, weekly, and monthly.
Render Handlebars templates with JSON data and preparation scripts for custom helpers in-browser.
Render Mermaid syntax into visual diagrams directly in your browser with clear error feedback.
Connect to WebSocket endpoints, send messages, and inspect realtime responses with chronological logs.
Generate starter regex patterns for common validation use cases.
Test simple JSON path expressions against JSON input and inspect matched values.
Generate demo JWT structures from header and payload JSON with transparent signing limitations.
Examples, Regex examples, Converter hub, Learn guides.