📂 Free Online Tools by Category
Browse all 137 tools organized by category. Find exactly what you need — calculators, converters, generators, developer tools, and more.
Calculators
BMI, compound interest, retirement, savings, loan, and 18 more financial calculators
Converters
JSON, CSV, XML, timestamp, unit, color, currency — 29 format converters
CSS Generators
Border-radius, box-shadow, clamp, gradient, and filter CSS generators
Developer Tools
Regex, SQL, JSON, HTML, CSS, Markdown — 16 tools for developers
Finance Tools
DCA calculator, dividend tracker, trade risk, and investment tools
Generators
QR code, UUID, password, barcode, schema markup, and 24 more generators
Health Tools
BMI, calorie, water intake, keto macro, and wellness calculators
PDF Tools
PDF split, merge, to-image, and image-to-PDF conversion tools
Productivity Tools
Pomodoro, stopwatch, pomodoro-task, and focus timers
SEO Tools
SERP preview, OG preview, Twitter card preview, and meta tag tools