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 |
|---|---|---|---|
|
Overtime Calculator
|
Date & Time | Open | |
|
Overtime Pay Calculator
|
Finance Tools | Open | |
|
Overtime Pay Calculator
|
Finance Tools | Open | |
|
Ovulation Calculator
|
Health & Fitness | Open | |
|
OWASP Top 10 Checklist
|
Security & Privacy | Open | |
|
Oxidation Number Calculator
|
Chemistry Tools | Open | |
|
Oxygen Electron Configuration
|
Chemistry Tools | Open | |
|
Oxygen Element Properties
|
Chemistry Tools | Open | |
|
Oxygen Oxidation States
|
Chemistry Tools | Open | |
|
Oxygen Tank Duration Calculator
|
Engineering Tools | Open | |
|
Oxygenation Index Calculator
|
Health & Fitness | Open | |
|
P Value Calculator
|
Math Calculators | Open | |
|
Pack Year Calculator
|
Health & Fitness | Open | |
|
package.json Scripts Reference
|
Developer Tools | Open | |
|
Packed Tower Calculator
|
Engineering Tools | Open | |
|
Packing List Generator
|
Travel Tools | Open | |
|
Packing Slip Generator
|
PDF Tools | Open | |
|
Packing Time Estimator
|
Travel Tools | Open | |
|
Padua Score
|
Health & Fitness | Open | |
|
Padua VTE Prophylaxis Score
|
Health & Fitness | Open | |
|
Page Weight Budget Calculator
|
Developer Tools | Open | |
|
Pages To Words Calculator
|
Text Tools | Open | |
|
Paint by Volume Mixer
|
Home & DIY | Open | |
|
Paint Calculator
|
Construction Tools | Open | |
|
Paint Coverage Calculator
|
Construction Tools | Open | |
|
Paired T Test Calculator
|
Statistics Tools | Open | |
|
Pakistan Country Facts
|
Geography Tools | Open | |
|
Pakistan Time Zones Overview
|
Geography Tools | Open | |
|
Paladin Name Generator
|
Generators | Open | |
|
Palindrome Checker
|
Text Tools | Open | |
|
Palindrome Number Checker
|
Math Calculators | Open | |
|
Palladium Electron Configuration
|
Chemistry Tools | Open | |
|
Palladium Element Properties
|
Chemistry Tools | Open | |
|
Palladium Oxidation States
|
Chemistry Tools | Open | |
|
PAN Card Photo Resizer
|
Image Tools | Open | |
|
Pan Law Calculator
|
Audio Tools | Open | |
|
Panko Cups to Grams
|
Food & Cooking | Open | |
|
Panko Grams to Cups
|
Food & Cooking | Open | |
|
PANSS Helper
|
Health & Fitness | Open | |
|
Pantone to HEX Approximator
|
Color Tools | Open | |
|
PaO2/FiO2 Ratio Calculator
|
Health & Fitness | Open | |
|
Paper Size Reference Chart
|
Productivity | Open | |
|
Paper Weight Calculator
|
Engineering Tools | Open | |
|
Parabola Vertex Calculator
|
Math Calculators | Open | |
|
Paragraph Splitter
|
Text Tools | Open | |
|
Paragraph Structure Analyzer
|
Text Tools | Open | |
|
Parallel Line Calculator
|
Math Calculators | Open | |
|
Parallel Plate Capacitance Calculator
|
Physics Tools | Open |
Showing 5,281–5,328 of 8,451 tools