Free tools
Browser-based tools.
No sign-up. Nothing leaves your device.
Every tool runs entirely in your browser. No uploads, no accounts, no data sent anywhere. Free to use, forever.
AI & LLM
JSON → TOON Converter
Shrink JSON for LLM prompts
Convert verbose JSON to Token-Oriented Object Notation. Reduces token count by 30–60% for AI workflows.
File → Markdown
Any format, clean Markdown output
Convert CSV, JSON, HTML, YAML, TOML, SQL, and more to clean Markdown. Built for RAG pipelines and LLM prompt preparation.
AI Token Counter
GPT, Claude & Gemini side by side
Paste any text and see token counts for GPT-4o, Claude, and Gemini simultaneously. Includes context window usage and cost estimates.
Web & SEO
Image → WebP Converter
Optimize images for the web
Convert PNG, JPG, and GIF to WebP in your browser. Adjust quality, compare file sizes, download instantly. No uploads.
Robots.txt Builder
Block bots, AI crawlers & more
Build and test robots.txt rules visually. Block GPTBot, ClaudeBot, Google-Extended. Test any URL against your rules instantly.