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 |
|---|---|---|---|
|
RhoGAM Dose Calculator
|
Health & Fitness | Open | |
|
Rhyme Finder
|
Language Tools | Open | |
|
Rice Carbon Footprint Calculator
|
Agriculture Tools | Open | |
|
Rice Cups to Grams Converter
|
Food & Cooking | Open | |
|
Rice Grams to Cups Converter
|
Food & Cooking | Open | |
|
Rice Yield Estimator
|
Agriculture Tools | Open | |
|
Richter Magnitude Calculator
|
Science Tools | Open | |
|
Ricotta Cups to Grams Converter
|
Food & Cooking | Open | |
|
Ricotta Grams to Cups Converter
|
Food & Cooking | Open | |
|
Riemann Sum Calculator
|
Math Calculators | Open | |
|
RIFLE AKI Criteria
|
Health & Fitness | Open | |
|
Rifle Zero Calculator
|
Sports Tools | Open | |
|
Right Arrow Symbol
|
Symbols & Unicode | Open | |
|
Ring Resize Cost Estimator
|
Jewelry Tools | Open | |
|
Ring Size Converter
|
Reference Tools | Open | |
|
Ringtone Maker
|
Audio Tools | Open | |
|
RIPEMD-160 Hash Generator
|
Developer Tools | Open | |
|
RIPEMD-160 Hash Generator
|
Developer Tools | Open | |
|
Rise Time Calculator
|
Engineering Tools | Open | |
|
Risk Reward Ratio Calculator
|
Finance Tools | Open | |
|
River Rock Calculator
|
Construction Tools | Open | |
|
RL Circuit Calculator
|
Physics Tools | Open | |
|
RLC Circuit Calculator
|
Physics Tools | Open | |
|
RMS Voltage Calculator
|
Engineering Tools | Open | |
|
RMSE Calculator
|
Statistics Tools | Open | |
|
Road Grade Calculator
|
Engineering Tools | Open | |
|
Road Trip Cost Calculator
|
Travel Tools | Open | |
|
Road Trip Split Calculator
|
Finance Tools | Open | |
|
ROAS Calculator
|
E-Commerce Tools | Open | |
|
ROAS Marketing Calculator
|
Marketing Tools | Open | |
|
Roblox Font Generator
|
Text Tools | Open | |
|
Robot Battery Runtime Calculator
|
Engineering Tools | Open | |
|
Robot Jacobian Calculator
|
Engineering Tools | Open | |
|
Robot Name Generator
|
Generators | Open | |
|
Robot Speak Translator
|
Text Tools | Open | |
|
Robots.txt Builder
|
Developer Tools | Open | |
|
Robots.txt Generator
|
SEO Tools | Open | |
|
ROC AUC Explainer
|
Statistics Tools | Open | |
|
Roche Limit Calculator
|
Space & Astronomy | Open | |
|
Rock Density Calculator
|
Science Tools | Open | |
|
Rock Fragmentation Size Estimator
|
Engineering Tools | Open | |
|
Rockall GI Bleed Score
|
Health & Fitness | Open | |
|
Rockall Score (Detailed)
|
Health & Fitness | Open | |
|
Rocket Mass Ratio Calculator
|
Science Tools | Open | |
|
ROI Calculator
|
Finance Tools | Open | |
|
Rolled Throughput Yield Calculator
|
Engineering Tools | Open | |
|
Rolling Resistance Calculator
|
Engineering Tools | Open | |
|
Romaji Converter
|
Language Tools | Open |
Showing 6,289–6,336 of 8,451 tools