All Free Tools
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 |
|---|---|---|---|
|
Stock Profit Calculator
|
Finance Tools | Open | |
|
Stocking Rate Calculator
|
Agriculture Tools | Open | |
|
Stoichiometry Calculator
|
Science Tools | Open | |
|
Stones to Carats Converter
|
Unit Converters | Open | |
|
Stones to Grains Converter
|
Unit Converters | Open | |
|
Stones to Grams Converter
|
Unit Converters | Open | |
|
Stones to Kilograms Converter
|
Unit Converters | Open | |
|
Stones to Micrograms Converter
|
Unit Converters | Open | |
|
Stones to Milligrams Converter
|
Unit Converters | Open | |
|
Stones to Ounces Converter
|
Unit Converters | Open | |
|
Stones to Pounds Converter
|
Unit Converters | Open | |
|
Stones to Tonnes Converter
|
Unit Converters | Open | |
|
Stool Osmotic Gap Calculator
|
Health & Fitness | Open | |
|
Stop Loss Calculator
|
Finance Tools | Open | |
|
Stopping Sight Distance Calculator
|
Engineering Tools | Open | |
|
Stopwatch Tool
|
Productivity | Open | |
|
Stopwatch with Laps
|
Date & Time | Open | |
|
Storage Unit Size Calculator
|
Home & DIY | Open | |
|
Storage Unit Size Finder
|
Home & DIY | Open | |
|
Story Dimension Reference
|
Social Media Tools | Open | |
|
Story Point Estimator
|
Productivity | Open | |
|
Story Point to Hours Converter
|
Productivity | Open | |
|
Straddle Calculator
|
Finance Tools | Open | |
|
Straight Line Depreciation Calculator
|
Finance Tools | Open | |
|
Straight-Line Depreciation Detail Calculator
|
Finance Tools | Open | |
|
Strangle Options Calculator
|
Finance Tools | Open | |
|
Streamer Name Generator
|
Generators | Open | |
|
Streaming Bandwidth Calculator
|
Video Tools | Open | |
|
Strength Standards Checker
|
Fitness Tools | Open | |
|
Stress-Strain Calculator
|
Engineering Tools | Open | |
|
Strike and Dip Calculator
|
Science Tools | Open | |
|
Strike Water Temperature Calculator
|
Food & Cooking | Open | |
|
Strikethrough Text Generator
|
Text Tools | Open | |
|
Strikethrough Text Generator
|
Symbols & Unicode | Open | |
|
String Diff Tool
|
Developer Tools | Open | |
|
String Hash Comparison
|
Developer Tools | Open | |
|
String Length Counter
|
Developer Tools | Open | |
|
String Occurrences Counter
|
Developer Tools | Open | |
|
String Padding Tool
|
Developer Tools | Open | |
|
String Replace Tool
|
Developer Tools | Open | |
|
String Reverse (Dev)
|
Developer Tools | Open | |
|
String Shuffle Tool
|
Developer Tools | Open | |
|
String Similarity Checker
|
Developer Tools | Open | |
|
String Splitter
|
Developer Tools | Open | |
|
String Truncator with Ellipsis
|
Developer Tools | Open | |
|
Stripe Fee Calculator
|
E-Commerce Tools | Open | |
|
Stripping Ratio Calculator
|
Engineering Tools | Open | |
|
Strontium Electron Configuration
|
Chemistry Tools | Open |
Showing 6,961–7,008 of 8,451 tools