All Free Tools
8,445 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 |
|---|---|---|---|
|
Coin Flip Streak Probability Calculator
|
Math Calculators | Open | |
|
Coin Flipper
|
Gaming Tools | Open | |
|
Coinsurance Calculator
|
Insurance Tools | Open | |
|
Cold Brew Ratio Calculator
|
Food & Cooking | Open | |
|
Collage Maker
|
Image Tools | Open | |
|
Collatz Sequence Calculator
|
Math Calculators | Open | |
|
College Credit Hour Calculator
|
Education | Open | |
|
College GPA Converter
|
Education | Open | |
|
Colligative Properties Calculator
|
Chemistry Tools | Open | |
|
Collinear Points Checker
|
Math Calculators | Open | |
|
Color Bit Depth Calculator
|
Video Tools | Open | |
|
Color Blind Safe Checker
|
Accessibility Tools | Open | |
|
Color Blindness Simulator
|
Color Tools | Open | |
|
Color Blindness Simulator - Deuteranopia
|
Color Tools | Open | |
|
Color Blindness Simulator - Protanopia
|
Color Tools | Open | |
|
Color Blindness Simulator - Tritanopia
|
Color Tools | Open | |
|
Color Code Converter
|
Developer Tools | Open | |
|
Color Contrast Checker
|
Color Tools | Open | |
|
Color Contrast Checker WCAG
|
Color Tools | Open | |
|
Color Harmony Generator
|
Design Tools | Open | |
|
Color Mixer
|
Color Tools | Open | |
|
Color Name Finder
|
Color Tools | Open | |
|
Color Palette Generator from One Color
|
Color Tools | Open | |
|
Color Picker Online — HEX, RGB, HSL
|
Color Tools | Open | |
|
Color Separation Helper
|
Printing Tools | Open | |
|
Color Shade Generator (Darker Steps)
|
Color Tools | Open | |
|
Color Temperature Helper
|
Physics Tools | Open | |
|
Color Tint Generator (Lighter Steps)
|
Color Tools | Open | |
|
Color Tone Generator (Mix with Gray)
|
Color Tools | Open | |
|
Color Vision Deficiency Helper
|
Health & Fitness | Open | |
|
Colorectal Cancer Risk Score
|
Health & Fitness | Open | |
|
Column Aligner
|
Developer Tools | Open | |
|
Column Buckling Calculator
|
Construction Tools | Open | |
|
Column Extractor
|
Text Tools | Open | |
|
Column Load Capacity Calculator
|
Construction Tools | Open | |
|
Combination Calculator
|
Math Calculators | Open | |
|
Combinations With Repetition Calculator
|
Math Calculators | Open | |
|
Combinatorial Odds Calculator
|
Math Calculators | Open | |
|
Combine Decibels Calculator
|
Audio Tools | Open | |
|
Combined Gas Law Calculator
|
Chemistry Tools | Open | |
|
Commission Calculator
|
HR & Payroll | Open | |
|
Commission Tier Calculator
|
Finance Tools | Open | |
|
Common Ion Effect Calculator
|
Chemistry Tools | Open | |
|
Common Network Ports Reference
|
Networking Tools | Open | |
|
Common Ports Reference
|
Developer Tools | Open | |
|
Common Regex Library
|
Developer Tools | Open | |
|
Companion Planting Guide
|
Gardening Tools | Open | |
|
Complement Probability Calculator
|
Math Calculators | Open |
Showing 1,345–1,392 of 8,445 tools