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8,451 free online tools across 85 categories
Every tool here runs in your browser — no sign-up, no upload, nothing to install. Convert files, format code, generate text, run calculations, and check SEO across PDF, image, developer, finance, and unit-conversion tools. Pick one and start.
| Tool | Category | Description | Action |
|---|---|---|---|
|
Silhouette Score Helper
|
Computer Science Tools | Open | |
|
Silicon Electron Configuration
|
Chemistry Tools | Open | |
|
Silicon Element Properties
|
Chemistry Tools | Open | |
|
Silicon Oxidation States Reference
|
Chemistry Tools | Open | |
|
Silver Electron Configuration
|
Chemistry Tools | Open | |
|
Silver Element Properties
|
Chemistry Tools | Open | |
|
Silver Oxidation States
|
Chemistry Tools | Open | |
|
Silver Price by Weight Calculator
|
Finance Tools | Open | |
|
Simple Harmonic Motion Calculator
|
Science Tools | Open | |
|
Simple Interest Calculator
|
Finance Tools | Open | |
|
Simple Pendulum Calculator
|
Physics Tools | Open | |
|
Simpson Diversity Index Calculator
|
Biology Tools | Open | |
|
Simpson's Rule Calculator
|
Math Calculators | Open | |
|
Sine Calculator
|
Math Calculators | Open | |
|
Singapore Capital Gains Tax Calculator
|
Finance Tools | Open | |
|
Singapore Corporate Tax Calculator
|
Finance Tools | Open | |
|
Singapore Country Facts
|
Geography Tools | Open | |
|
Singapore Income Tax Calculator
|
Finance Tools | Open | |
|
Singapore Mortgage Calculator
|
Finance Tools | Open | |
|
Singapore Time Zones Overview
|
Geography Tools | Open | |
|
Singapore VAT Calculator
|
Finance Tools | Open | |
|
Single Slit Diffraction Calculator
|
Physics Tools | Open | |
|
SIP Calculator
|
Finance Tools | Open | |
|
SIRS Criteria Calculator
|
Health & Fitness | Open | |
|
SIRS Criteria for Sepsis Calculator
|
Health & Fitness | Open | |
|
Sitemap XML Generator
|
Developer Tools | Open | |
|
Skewness Calculator
|
Math Calculators | Open | |
|
Skin Depth Calculator
|
Physics Tools | Open | |
|
Skincare Routine Order Guide
|
Beauty Tools | Open | |
|
SLA Uptime Calculator
|
Developer Tools | Open | |
|
SLEDAI Lupus Score Calculator
|
Health & Fitness | Open | |
|
Sleep Cycle Calculator
|
Health & Fitness | Open | |
|
Sleep Cycle Calculator
|
Date & Time | Open | |
|
Slenderness Ratio Calculator
|
Engineering Tools | Open | |
|
Slope Calculator
|
Math Calculators | Open | |
|
Slope Distance Calculator
|
Engineering Tools | Open | |
|
Slope Gradient Calculator
|
Science Tools | Open | |
|
Slope Intercept Calculator
|
Math Calculators | Open | |
|
Slope Stability Factor of Safety Calculator
|
Engineering Tools | Open | |
|
Sludge Volume Index Calculator
|
Engineering Tools | Open | |
|
Slugify Tool
|
Developer Tools | Open | |
|
Small Caps Generator
|
Symbols & Unicode | Open | |
|
Small Caps Text Generator
|
Text Tools | Open | |
|
Smart Quotes Converter
|
Text Tools | Open | |
|
SMART-COP Score Calculator
|
Health & Fitness | Open | |
|
SMD Capacitor Code
|
Electrical Tools | Open | |
|
SMD Resistor Code
|
Electrical Tools | Open | |
|
Smiley Emoji List
|
Symbols & Unicode | Open |
Showing 6,625–6,672 of 8,451 tools