A collection of utilities I've built to solve common problems. Free to use, built with care.
Extract website content in LLM-ready markdown format. Preview site structure and export clean markdown for AI training.
Convert Excel files to Markdown, JSON, or CSV. Select specific sheets and export in LLM-friendly formats.
Ask anything about Paul Graham's essays and Y Combinator wisdom. Get startup advice powered by AI.
Summarize long articles, documents, or any text into concise key points using AI.
Analyze the emotional tone and sentiment of any text. Detect emotions and confidence levels.
Rewrite text in different words while keeping the original meaning. Get multiple variations.
Format, validate, and minify JSON data. Beautify messy JSON with customizable indentation.
Encode text to Base64 or decode Base64 strings back to plain text.
Generate random UUIDs in various formats. Create multiple IDs at once.
Test and debug regular expressions in real-time with match highlighting.
Convert colors between HEX, RGB, and HSL formats with live preview.
Convert between Unix timestamps and human-readable dates.
Count tokens for GPT-4, Claude, Llama and more. Uses official tokenizers with cost estimation.
Count words, characters, sentences, and more. Get reading time estimates.