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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 |
|---|---|---|---|
|
Chinese Age Calculator
|
Date & Time | Open | |
|
Chinese Lunar Calendar Converter
|
Date & Time | Open | |
|
Chinese Remainder Theorem Calculator
|
Math Calculators | Open | |
|
Chinese Zodiac by Year
|
Culture & Trivia | Open | |
|
Chlorine Dose Calculator
|
Engineering Tools | Open | |
|
Chlorine Electron Configuration
|
Chemistry Tools | Open | |
|
Chlorine Element Properties
|
Chemistry Tools | Open | |
|
Chlorine Oxidation States
|
Chemistry Tools | Open | |
|
Chmod Calculator
|
Developer Tools | Open | |
|
Chmod Symbolic Converter
|
Developer Tools | Open | |
|
Chocolate Chips Cups to Grams
|
Food & Cooking | Open | |
|
Chocolate Chips Grams to Cups
|
Food & Cooking | Open | |
|
Chocolate Tempering Guide
|
Food & Cooking | Open | |
|
Cholesterol Unit Converter
|
Health & Fitness | Open | |
|
Chord Finder
|
Music Tools | Open | |
|
Chord Inversion Finder
|
Music Tools | Open | |
|
Chore Chart Generator
|
PDF Tools | Open | |
|
Chroma Subsampling Helper
|
Video Tools | Open | |
|
Chromium Electron Configuration
|
Chemistry Tools | Open | |
|
Chromium Element Properties
|
Chemistry Tools | Open | |
|
Chromium Oxidation States
|
Chemistry Tools | Open | |
|
Churn Rate Calculator
|
Marketing Tools | Open | |
|
CIDR Calculator
|
Developer Tools | Open | |
|
CIDR to IP Range
|
Developer Tools | Open | |
|
CIDR to IP Range Converter
|
Developer Tools | Open | |
|
Circle Area Calculator
|
Number Tools | Open | |
|
Circle Crop Tool
|
Image Tools | Open | |
|
Circle Equation Calculator
|
Math Calculators | Open | |
|
Circle of Fifths Tool
|
Music Tools | Open | |
|
Circle Text Generator
|
Symbols & Unicode | Open | |
|
Circled Text Converter
|
Text Tools | Open | |
|
Circuit Breaker Size Calculator
|
Electrical Tools | Open | |
|
Citation Counter
|
Writing Tools | Open | |
|
Citation Generator APA
|
Education | Open | |
|
Citation Generator Chicago
|
Education | Open | |
|
Citation Generator MLA
|
Education | Open | |
|
CIWA-Ar Alcohol Withdrawal Scale
|
Health & Fitness | Open | |
|
CJK Character Counter
|
Language Tools | Open | |
|
CKD-EPI 2021 eGFR Calculator
|
Health & Fitness | Open | |
|
Clan Name Generator
|
Generators | Open | |
|
Class Rank Percentile Calculator
|
Education | Open | |
|
Class Weight Calculator
|
Developer Tools | Open | |
|
Clausius-Clapeyron Calculator
|
Chemistry Tools | Open | |
|
Clay Shrinkage Calculator
|
Number Tools | Open | |
|
Climbing Grade Converter
|
Sports Tools | Open | |
|
Climbing Route Density Calculator
|
Sports Tools | Open | |
|
Clinical Frailty Scale
|
Health & Fitness | Open | |
|
Closing Cost Calculator
|
Real Estate Tools | Open |
Showing 1,249–1,296 of 8,451 tools