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 |
|---|---|---|---|
|
Roman Name Generator
|
Generators | Open | |
|
Roman Numeral Converter
|
Number Tools | Open | |
|
Roman Numeral Date Converter
|
Language Tools | Open | |
|
Roman Numeral Symbols
|
Symbols & Unicode | Open | |
|
Romex Wire Size Calculator
|
Electrical Tools | Open | |
|
RON to EUR Converter
|
Currency Converters | Open | |
|
RON to USD Converter
|
Currency Converters | Open | |
|
Roof Area Calculator
|
Construction Tools | Open | |
|
Roof Pitch Calculator
|
Construction Tools | Open | |
|
Roof Truss Calculator
|
Construction Tools | Open | |
|
Room Air Changes Calculator
|
HVAC Tools | Open | |
|
Room Mode Calculator
|
Audio Tools | Open | |
|
Room Size Calculator
|
Construction Tools | Open | |
|
Root Locus Helper
|
Engineering Tools | Open | |
|
Rope Length Calculator
|
Marine Tools | Open | |
|
Rose Fertilizer Calculator
|
Gardening Tools | Open | |
|
ROT13 Cipher
|
Developer Tools | Open | |
|
ROT13 Cipher Tool
|
Text Tools | Open | |
|
ROT13 Decoder
|
Developer Tools | Open | |
|
ROT13 Text Tool
|
Text Tools | Open | |
|
ROT47 Cipher
|
Developer Tools | Open | |
|
ROT47 Cipher Tool
|
Text Tools | Open | |
|
Rotating Imbalance Force Calculator
|
Engineering Tools | Open | |
|
Rotation Matrix 2D
|
Math Calculators | Open | |
|
Rotational Kinetic Energy Calculator
|
Physics Tools | Open | |
|
Roth IRA Calculator
|
Finance Tools | Open | |
|
Roulette Odds Calculator
|
Math Calculators | Open | |
|
Rounding Calculator
|
Number Tools | Open | |
|
Rounding Rules Helper
|
Education | Open | |
|
Row Spacing Calculator
|
Gardening Tools | Open | |
|
Rowing Split Calculator
|
Sports Tools | Open | |
|
Rowing Watts Calculator
|
Sports Tools | Open | |
|
Rows Per Page Calc
|
Databases | Open | |
|
RPE to Percentage of 1RM Calculator
|
Fitness Tools | Open | |
|
RPM to Gigahertz Converter
|
Unit Converters | Open | |
|
RPM to Hertz Converter
|
Unit Converters | Open | |
|
RPM to Kilohertz Converter
|
Unit Converters | Open | |
|
RPM to Megahertz Converter
|
Unit Converters | Open | |
|
RPM to Vehicle Speed Calculator
|
Automotive Tools | Open | |
|
RSA Key Size Explainer
|
Security & Privacy | Open | |
|
RSI Drug Dose Calculator
|
Health & Fitness | Open | |
|
RSS Feed Generator
|
SEO Tools | Open | |
|
RSVP Count Tracker
|
Home & DIY | Open | |
|
RUB to EUR Converter
|
Currency Converters | Open | |
|
RUB to GBP Converter
|
Currency Converters | Open | |
|
RUB to USD Converter
|
Currency Converters | Open | |
|
Rubidium Electron Configuration
|
Chemistry Tools | Open | |
|
Rubidium Element Properties
|
Chemistry Tools | Open |
Showing 6,337–6,384 of 8,451 tools