Free online calculators

Percentage Calculator Calculate percentages, percentage change, and what percent one number is of another. Age Calculator Calculate age in years, months, and days from a date of birth. Time Calculator Add minutes and hours to a start time, or calculate the duration between two times. Tip Calculator Calculate tip, total bill, and split amount per person. Unit Converter Convert common length and weight units including miles, kilometers, pounds, and kilograms.

PDF Tools Merge, split, extract, and rotate PDF files in your browser without uploading documents. Developer Tools Format JSON, encode Base64, test regex, decode JWTs, generate hashes, convert timestamps, and create UUIDs. Image Tools Resize, compress, and convert images to WebP directly in your browser. Business Tools Generate QR codes, invoices, and small business assets without creating an account. Text Tools Count words, convert case, repeat text, compare text, and prepare content quickly. Productivity Tools Use quick tools for focus sessions, habits, random choices, and daily decisions. Work Style Tools Plan interview outfits, decode workplace dress codes, match colors, and prepare profile photo looks.