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 |
|---|---|---|---|
|
Discount Impact on Margin Calculator
|
Finance Tools | Open | |
|
Discount Pricing Calculator
|
E-Commerce Tools | Open | |
|
Discriminant Calculator
|
Math Calculators | Open | |
|
Disinfection CT Value Calculator
|
Health & Fitness | Open | |
|
Displacement Calculator
|
Science Tools | Open | |
|
Displacement From Bore & Stroke
|
Engine & Combustion Tools | Open | |
|
Displacement Hull Speed Calculator
|
Marine Tools | Open | |
|
Dissolved Oxygen Saturation Calculator
|
Engineering Tools | Open | |
|
Distance Between Cities
|
Travel Tools | Open | |
|
Distance Between Points Calculator
|
Math Calculators | Open | |
|
Distance Calculator (Coordinates)
|
Travel Tools | Open | |
|
Distance Modulus Calculator
|
Astrophysics Tools | Open | |
|
Distance Point To Line Calculator
|
Math Calculators | Open | |
|
Distance To Horizon Calculator
|
Space & Astronomy | Open | |
|
Divergence Calculator
|
Math Calculators | Open | |
|
Dividend Payout Ratio Calculator
|
Accounting Tools | Open | |
|
Dividend Reinvestment Calculator (DRIP)
|
Finance Tools | Open | |
|
Dividend Yield Calculator
|
Finance Tools | Open | |
|
Division Symbol
|
Symbols & Unicode | Open | |
|
DJ Name Generator
|
Generators | Open | |
|
DKIM Record Generator
|
Networking Tools | Open | |
|
DKK to EUR Converter
|
Currency Converters | Open | |
|
DKK to GBP Converter
|
Currency Converters | Open | |
|
DKK to USD Converter
|
Currency Converters | Open | |
|
DLQI Dermatology Life Quality Index
|
Health & Fitness | Open | |
|
DMARC Record Generator
|
Networking Tools | Open | |
|
DMS to Decimal Degrees Converter
|
Space & Astronomy | Open | |
|
DNA Concentration Calculator
|
Chemistry Tools | Open | |
|
DNA Copy Number Calculator
|
Chemistry Tools | Open | |
|
DNA Reverse Complement Tool
|
Biology Tools | Open | |
|
DNA to mRNA Converter
|
Chemistry Tools | Open | |
|
DNA/RNA GC Content Calculator
|
Biology Tools | Open | |
|
DNA/RNA Ratio Calculator
|
Biology Tools | Open | |
|
DNS Propagation Checker
|
Developer Tools | Open | |
|
DNS Propagation Checker
|
Networking Tools | Open | |
|
DNS Record Lookup
|
Networking Tools | Open | |
|
Docker Compose Template Generator
|
Developer Tools | Open | |
|
Docker Compose Validator
|
Developer Tools | Open | |
|
Dockerfile Generator
|
Developer Tools | Open | |
|
Dockerfile Template Generator
|
Developer Tools | Open | |
|
Dockerignore Generator
|
Developer Tools | Open | |
|
Dog Age Calculator
|
Pet Tools | Open | |
|
Dog BSA Calculator
|
Veterinary Tools | Open | |
|
Dog Calorie & RER Calculator
|
Veterinary Tools | Open | |
|
Dog Crate Size Finder
|
Pet Tools | Open | |
|
Dog Food Portion Calculator
|
Pet Tools | Open | |
|
Dog Medication Dosage Calculator
|
Health & Fitness | Open | |
|
Dog Name Generator
|
Generators | Open |
Showing 2,065–2,112 of 8,445 tools