All Categories
Browse 24 categories of free online tools.
Tax Calculators
Income tax, self-employment tax, sales tax, and more for individuals and businesses.
33 toolsPayroll Calculators
Paycheck estimators, employer cost calculators, and overtime tools.
24 toolsPricing Calculators
Markup, margin, hourly rate, and project pricing tools.
13 toolsBusiness Planning
Break-even analysis, startup cost estimators, and ROI calculators.
23 toolsFreelancer Tools
Rate calculators, invoice generators, and time tracking tools for freelancers.
9 toolsE-Commerce Calculators
FBA fees, shipping cost, profit margin, and dropshipping calculators.
10 toolsReal Estate Calculators
Mortgage, rental yield, property tax, and closing cost calculators.
10 toolsAI Economy Tools
AI cost calculators, ROI tools, and job impact analyzers.
22 toolsAI Agency Tools
Pricing, profitability, and client ROI tools for AI agencies.
20 toolsFile Converters
Convert documents, images, audio, video, and data files in your browser.
235 toolsFile Viewers
View PDF, Word, Excel, code, and 20+ file types directly in your browser — no software needed.
20 toolsEveryday Tools
Unit converters, currency tools, and quick-reference everyday utilities.
22 toolsDeveloper Tools
Color converters, encoders, generators, and utilities for developers.
28 toolsInvestment Calculators
Compound interest, ROI, retirement savings, and investment growth tools.
13 toolsContent & Social Media
Hashtag generators, hook writers, slang translators, and creator economy tools.
9 toolsDesign Tools
Color pickers, gradient generators, contrast checkers, and visual design utilities.
8 toolsStudent & Study Tools
GPA calculators, flashcard makers, typing tests, citation generators, and study planners.
30 toolsHealth & Fitness
TDEE, macro, pace, body fat, and water intake calculators for health and fitness goals.
10 toolsGaming Tools
Mouse sensitivity converters, FPS calculators, DPI tools, and PC bottleneck analyzers.
15 toolsWriting & Language
Writing prompts, rhyme finders, name generators, and syllable counters for writers.
7 toolsPersonal Finance
Budget calculators, debt payoff planners, net worth trackers, and paycheck budgeters.
5 toolsCooking & Kitchen
Recipe scalers, cooking unit converters, ingredient substitutions, and baking ratio calculators.
4 toolsChemistry Calculators
Chemical equation balancers, molar mass calculators, and stoichiometry tools for students and professionals.
3 toolsBiology Calculators
Genetics calculators, DNA/RNA tools, population genetics, and molecular biology helpers for students and researchers.
3 toolsStart from Topic Hubs
Topic hubs chain related tools together so you can complete full workflows with fewer dead ends.
Tax and Payroll Optimization Hub
Paycheck, withholding, tax planning, and reimbursement workflows for recurring money operations.
Business and AI Economics Hub
Cost, ROI, and automation decision workflows for AI adoption and growth planning.
Conversion and Data Pipelines Hub
High-demand document, media, and data conversion flows for repeat utility usage.
Freelancer Unit Economics Hub
Pricing, margin, tax, and workload tools for independent operators.