All Tools
40+ free tools across 8 categories — no sign-up, no limits.
JSON to JSONL Converter
Convert standard JSON arrays to newline-delimited JSON Lines for AI fine-tuning
Markdown ↔ HTML Converter
Convert HTML to Markdown and Markdown to HTML formats bidirectionally
Markdown to PDF Converter
Render Markdown files into elegant print-ready document layouts and export as vector PDFs
JSON to Zod Schema Generator
Generate type-safe Zod and JSON Schema definitions from JSON objects for LLM structured outputs
LLM Token & Cost Calculator
Estimate token count and model processing costs for OpenAI, Claude, and Gemini
CSV to JSONL Dataset Mapper
Convert and map CSV spreadsheet columns into structured JSONL chat logs for LLM fine-tuning
Document to Markdown Converter
Convert PDF, Word (DOCX), HTML, and Text documents to clean Markdown for AI context ingestion
Image Converter & Optimizer
Convert and optimize PNG, JPG, and WebP images with custom resolution resizing and AVIF/WebP formats
Figma to React/Tailwind Converter
Parse Figma JSON Node layers and generate responsive React components styled with Tailwind CSS
OpenAPI to TypeScript SDK Generator
Convert OpenAPI / Swagger JSON schemas into fully typed fetch API clients and TypeScript interfaces
JSON Formatter
Format, validate and beautify JSON data instantly
JSON Validator
Validate JSON and get detailed error messages
JSON to CSV
Convert JSON arrays to CSV format and download
CSV to JSON
Convert CSV data to JSON format instantly
Base64 Encoder/Decoder
Encode or decode Base64 strings and files
JWT Decoder
Decode and inspect JWT tokens without a secret
Regex Tester
Test regular expressions with live match highlighting
UUID Generator
Generate UUID v4 and v7 identifiers in bulk
Password Generator
Generate strong, customizable passwords
Hash Generator
Generate MD5, SHA-256 and SHA-512 hashes
Color Picker
Pick colors in HEX, RGB, HSL and generate palettes
Gradient Generator
Create beautiful CSS gradients with a live preview
Resume Optimizer
AI-powered resume optimization for any job description
Cover Letter Generator
Generate tailored cover letters with AI
AI Email Writer
Compose professional emails with AI assistance
Grammar Checker
Check grammar, spelling and improve writing style
BMI Calculator
Calculate your Body Mass Index with health insights
Calorie Calculator
Calculate daily calorie needs and TDEE
Water Intake Calculator
Calculate your ideal daily water intake
Body Fat Calculator
Estimate body fat percentage using Navy and BMI methods
Age Calculator
Calculate exact age in years, months, and days
EMI Calculator
Calculate loan EMI with amortization schedule
SIP Calculator
Calculate SIP investment returns with charts
Currency Converter
Convert between 150+ currencies with live rates
QR Code Generator
Generate QR codes for URLs, text, and more
Word & Character Counter
Count words, characters, sentences and paragraphs
Text Case Converter
Convert text between 8 different case formats
Tip Calculator
Calculate tips and split bills among friends
Compound Interest Calculator
Calculate compound interest with visual charts
Random Picker
Pick a random number or item from a list
Unit Converter
Convert length, weight, temperature, area and volume
Percentage Calculator
Calculate percentages, percentage change and more