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 |
|---|---|---|---|
|
Protein Intake Calculator
|
Health & Fitness | Open | |
|
Protein Molecular Weight Calculator
|
Biology Tools | Open | |
|
Protein Per Kg Calculator
|
Health & Fitness | Open | |
|
Protein Timing Helper
|
Fitness Tools | Open | |
|
Proxy Video Size Estimator
|
Video Tools | Open | |
|
PSA Density Calculator
|
Health & Fitness | Open | |
|
PSA Density Calculator (Urology)
|
Health & Fitness | Open | |
|
PSA Doubling Time Calculator
|
Health & Fitness | Open | |
|
PSA Velocity Calculator
|
Health & Fitness | Open | |
|
PSI / PORT Score Calculator (Pneumonia Severity)
|
Health & Fitness | Open | |
|
PSI to Atmospheres Converter
|
Unit Converters | Open | |
|
PSI to Bar Converter
|
Unit Converters | Open | |
|
PSI to inHg Converter
|
Unit Converters | Open | |
|
PSI to Kilopascals Converter
|
Unit Converters | Open | |
|
PSI to mmHg Converter
|
Unit Converters | Open | |
|
PSI to Pascals Converter
|
Unit Converters | Open | |
|
PSI to Torr Converter
|
Unit Converters | Open | |
|
PSQI Sleep Quality Calculator
|
Health & Fitness | Open | |
|
Psychrometric Calculator
|
HVAC Tools | Open | |
|
PTO Accrual Calculator
|
Finance Tools | Open | |
|
PTR Record Generator
|
Networking Tools | Open | |
|
Pull-Up Resistor Calculator
|
Electrical Tools | Open | |
|
Pulley Mechanical Advantage Calculator
|
Physics Tools | Open | |
|
Pulsed RF Calculator
|
Electrical Tools | Open | |
|
Pump Flow Calculator
|
Engineering Tools | Open | |
|
Pump Head Calculator
|
Plumbing Tools | Open | |
|
Pump NPSH Calculator
|
Engineering Tools | Open | |
|
Pump Power Calculator
|
Physics Tools | Open | |
|
Pumpkin Seeds Cups to Grams
|
Food & Cooking | Open | |
|
Pumpkin Seeds Grams to Cups
|
Food & Cooking | Open | |
|
Punctuation Normalizer
|
Text Tools | Open | |
|
Punctuation Symbols
|
Symbols & Unicode | Open | |
|
Punnett Square Dihybrid
|
Biology Tools | Open | |
|
Punnett Square Monohybrid
|
Biology Tools | Open | |
|
Punnett Square Trihybrid
|
Chemistry Tools | Open | |
|
Punycode Decoder
|
Developer Tools | Open | |
|
Punycode Encoder
|
Developer Tools | Open | |
|
Puppy Weight Predictor
|
Pet Tools | Open | |
|
Put-Call Parity Calculator
|
Finance Tools | Open | |
|
PV Array Sizing Calculator
|
Engineering Tools | Open | |
|
PVWatts Solar Calculator
|
Engineering Tools | Open | |
|
PWA Checklist
|
Developer Tools | Open | |
|
PWM Duty Cycle Calculator
|
Electrical Tools | Open | |
|
PWM to Servo Angle Calculator
|
Engineering Tools | Open | |
|
PX to EM Converter
|
Design Tools | Open | |
|
PX to REM Converter
|
Developer Tools | Open | |
|
Q Factor Calculator
|
DSP Tools | Open | |
|
Q Value Nuclear Reaction Calculator
|
Physics Tools | Open |
Showing 5,905–5,952 of 8,451 tools