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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 |
|---|---|---|---|
|
Permeability Calculator
|
Science Tools | Open | |
|
Permeability Darcy Calculator
|
Engineering Tools | Open | |
|
Permutation Calculator
|
Math Calculators | Open | |
|
Permutations With Repetition Calculator
|
Math Calculators | Open | |
|
Perpendicular Line Calculator
|
Math Calculators | Open | |
|
Perpendicular Symbol
|
Symbols & Unicode | Open | |
|
Perplexity Calculator
|
Computer Science Tools | Open | |
|
Persian Calendar Converter
|
Date & Time | Open | |
|
Personal Loan Calculator
|
Finance Tools | Open | |
|
PERT Estimate Calculator
|
Productivity | Open | |
|
Peso Symbol
|
Symbols & Unicode | Open | |
|
Pesticide Mix Calculator
|
Agriculture Tools | Open | |
|
Pet Age in Human Years
|
Pet Tools | Open | |
|
Pet Calorie Calculator
|
Pet Tools | Open | |
|
Pet IV Drip Rate Calculator
|
Veterinary Tools | Open | |
|
Pet Medication Dose Calculator
|
Pet Tools | Open | |
|
Petabytes to Bits Converter
|
Unit Converters | Open | |
|
Petabytes to Bytes Converter
|
Unit Converters | Open | |
|
Petabytes to Gibibytes Converter
|
Unit Converters | Open | |
|
Petabytes to Gigabytes Converter
|
Unit Converters | Open | |
|
Petabytes to Kibibytes Converter
|
Unit Converters | Open | |
|
Petabytes to Kilobytes Converter
|
Unit Converters | Open | |
|
Petabytes to Mebibytes Converter
|
Unit Converters | Open | |
|
Petabytes to Megabytes Converter
|
Unit Converters | Open | |
|
Petabytes to Terabytes Converter
|
Unit Converters | Open | |
|
PEX vs Copper Flow Rate Comparison
|
Plumbing Tools | Open | |
|
pH Calculator
|
Chemistry Tools | Open | |
|
pH Control Calculator
|
Chemistry Tools | Open | |
|
pH of Buffer Solution (Henderson-Hasselbalch)
|
Chemistry Tools | Open | |
|
pH of Weak Acid Calculator
|
Chemistry Tools | Open | |
|
pH of Weak Base Calculator
|
Chemistry Tools | Open | |
|
pH to H+ Concentration Calculator
|
Chemistry Tools | Open | |
|
Phantom Load Calculator
|
Energy Tools | Open | |
|
Phase Margin Calculator
|
Engineering Tools | Open | |
|
Phi Symbol
|
Symbols & Unicode | Open | |
|
Philippines Capital Gains Tax Calculator
|
Finance Tools | Open | |
|
Philippines Corporate Tax Calculator
|
Finance Tools | Open | |
|
Philippines Country Facts
|
Geography Tools | Open | |
|
Philippines Income Tax Calculator
|
Finance Tools | Open | |
|
Philippines Mortgage Calculator
|
Finance Tools | Open | |
|
Philippines Time Zones Overview
|
Geography Tools | Open | |
|
Philippines VAT Calculator
|
Finance Tools | Open | |
|
Phone Number Regex Tester
|
Developer Tools | Open | |
|
Phone QR Code Generator
|
Generators | Open | |
|
Phonetic Symbols
|
Symbols & Unicode | Open | |
|
Phosphorus Electron Configuration
|
Chemistry Tools | Open | |
|
Phosphorus Element Properties
|
Chemistry Tools | Open | |
|
Phosphorus Oxidation States Explorer
|
Chemistry Tools | Open |
Showing 5,521–5,568 of 8,445 tools