All-in-One Tools Collection
A broad collection of online tools for development, AI, design, and productivity tasks.
Showing page 1 of 183 (12 tools on this page)
NSFW Image Content Detector
AI-powered image content safety detector using NSFWJS to classify potentially inappropriate content with fallback analysis, supporting GIF/Animated WebP/APNG and JPEG/PNG/WEBP.
RSS / Atom Feed Markdown Summarizer
Fetch an RSS or Atom feed by URL (or paste raw XML), parse it, sort items by publish date, deduplicate, apply a time window, and output a clean Markdown summary
Sun Position & Shadow Length Simulator
Compute the sun’s elevation and azimuth (NOAA algorithm) for any latitude, longitude, date and time, plus the length and direction of the shadow cast by an object of a given height, with sunrise/sunset and a full-day shadow curve
TOTP / HOTP Offline Code Generator
Generate RFC 6238 TOTP (time-based, 6/8 digits, 30/60s step) and RFC 4226 HOTP (counter-based) one-time passwords from a base32 shared secret, fully offline with HMAC-SHA1/256/512, plus an otpauth:// URI for importing into Google Authenticator / Authy
CSS Easing and Animation Visualizer
Visualize a CSS cubic-bezier easing curve, preview it live on position/opacity/scale, pick presets, and export copy-ready CSS
Markdown Link Checker
Statically check Markdown links for format errors, broken anchors, and undefined references (no network requests)
Markdown Lint and Style Checker
Lint Markdown against ~15 markdownlint rules plus 2 Chinese-typography rules, with line-located reports and one-click auto-fix of safe issues
Markdown Linter
Check Markdown for style issues: heading levels, code fences, list consistency, and more (zero-dependency rule engine)
Markdown TOC Generator
Generate a table of contents from Markdown headings with GitHub-style anchor links
Ohm's Law and Power Triangle Calculator
Solve for two unknowns among Voltage, Current, Resistance and Power from any two given values, with visual triangles and AC power-factor support
TOML Formatter
Format and beautify TOML. Note: comments are lost and key order may change (@iarna/toml limitation)
XML Formatter
Format, beautify and minify XML with configurable indent. Preserves comments and CDATA