Tool Guides

Explore guides for everyday calculations, document tasks and developer utilities. Choose a tool on the home page and read its short description for input examples.

Percentage: divide the part by the whole and multiply by 100. Discount: multiply the original price by the discount rate to find savings. JSON: paste valid JSON into the formatter to validate and pretty-print it. PDF: select files only when needed; PDF processing uses browser-side libraries loaded from a CDN and can use substantial memory for large files.