All Free Tools
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 |
|---|---|---|---|
|
Darts Average Calculator
|
Sports Tools | Open | |
|
Darts Double Out Chart
|
Sports Tools | Open | |
|
DAS28 Rheumatoid Arthritis Score
|
Health & Fitness | Open | |
|
DASH Score Calculator
|
Health & Fitness | Open | |
|
DAST-10 Drug Abuse Screening Test
|
Health & Fitness | Open | |
|
Data Compression Ratio Calculator
|
Computer Science Tools | Open | |
|
Data Matrix Generator
|
Generators | Open | |
|
Data Storage Converter
|
Unit Converters | Open | |
|
Data Transfer Calculator
|
Networking Tools | Open | |
|
Database Index Size Estimator
|
Developer Tools | Open | |
|
Database Partition Size Calculator
|
Databases | Open | |
|
Database Replication Lag Helper
|
Developer Tools | Open | |
|
Date Difference Calculator
|
Date & Time | Open | |
|
Date Format Converter
|
Developer Tools | Open | |
|
Date To Epoch
|
Dev Utilities | Open | |
|
Date to Roman Numeral Converter
|
Date & Time | Open | |
|
DAU/MAU Ratio Calculator
|
Marketing Tools | Open | |
|
Dawes Limit Calculator
|
Space & Astronomy | Open | |
|
Day of the Week Finder
|
Date & Time | Open | |
|
Day of Week Calculator
|
Date & Time | Open | |
|
Day of Week in History
|
Date & Time | Open | |
|
Day of Year Calculator
|
Date & Time | Open | |
|
Daylight Hours Calculator
|
Travel Tools | Open | |
|
Daylight Length Calculator
|
Weather Tools | Open | |
|
Days Between Dates Calculator
|
Date & Time | Open | |
|
Days to Decades Converter
|
Unit Converters | Open | |
|
Days to Hours Converter
|
Unit Converters | Open | |
|
Days to Microseconds Converter
|
Unit Converters | Open | |
|
Days to Milliseconds Converter
|
Unit Converters | Open | |
|
Days to Minutes Converter
|
Unit Converters | Open | |
|
Days to Months Converter
|
Unit Converters | Open | |
|
Days to Seconds Converter
|
Unit Converters | Open | |
|
Days to Weeks Converter
|
Unit Converters | Open | |
|
Days to Years Converter
|
Unit Converters | Open | |
|
Days Until April Fools Day
|
Date & Time | Open | |
|
Days Until Black Friday
|
Date & Time | Open | |
|
Days Until Boxing Day
|
Date & Time | Open | |
|
Days Until Canada Day
|
Date & Time | Open | |
|
Days Until Chinese New Year
|
Date & Time | Open | |
|
Days Until Christmas
|
Date & Time | Open | |
|
Days Until Cinco De Mayo
|
Date & Time | Open | |
|
Days Until Cyber Monday
|
Date & Time | Open | |
|
Days Until Diwali
|
Date & Time | Open | |
|
Days Until Earth Day
|
Date & Time | Open | |
|
Days Until Easter
|
Date & Time | Open | |
|
Days Until Eid al-Adha
|
Date & Time | Open | |
|
Days Until Eid al-Fitr
|
Date & Time | Open | |
|
Days Until Father's Day
|
Date & Time | Open |
Showing 1,873–1,920 of 8,445 tools