Data Tools
Browser-based data tools for converting, formatting, and comparing files in CSV, JSON, XML, Excel, and more. Perform format conversions, sort and filter data, and check differences — all without leaving your browser. Designed to boost productivity for data analysts and developers. Includes 5 tools.
A free online tool to paste OpenAPI (Swagger) JSON or YAML specs and instantly visualize API endpoints with color-coded HTTP methods, parameters, request bodies, and responses in a clean, readable format. All processing happens in your browser, keeping your API specifications private and secure.
Online tool to decode Protocol Buffers binary data without a .proto file. Input as hex string or Base64, and it automatically parses and displays field numbers, wire types, and decoded values.
A free online percentage calculator. Quickly compute percentage of a value, percentage change, and what percent one number is of another. Three common calculation patterns with real-time results. Useful for discount calculations, year-over-year growth rates, test scores, tax calculations, sales analysis, and more. All running entirely in your browser with no data transmission for complete privacy.
Extract, filter, and reorder columns from large CSV/TSV files directly in your browser. Fast local processing, zero data transmission, supports files Excel cannot open.
Instantly calculate the true cost of any meeting by entering the number of participants, average hourly rate, and meeting duration. Factor in preparation time and travel time for a comprehensive cost breakdown. View costs from multiple perspectives: cost per minute, per second, per attendee, and annual projections for recurring meetings. Use the real-time timer mode to see exactly how much money is being spent at every moment, helping you appreciate the real value of time. All data is processed entirely in your browser — nothing is sent to any server.