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 |
|---|---|---|---|
|
Hess's Law Calculator
|
Chemistry Tools | Open | |
|
Hessian Calculator
|
Math Calculators | Open | |
|
Hex Decoder
|
Developer Tools | Open | |
|
Hex Decoder
|
Developer Tools | Open | |
|
Hex Encoder
|
Developer Tools | Open | |
|
Hex Encoder
|
Developer Tools | Open | |
|
Hex Key Generator
|
Security & Privacy | Open | |
|
Hex to ASCII Converter
|
Developer Tools | Open | |
|
Hex to Base64 Converter
|
Developer Tools | Open | |
|
Hex to Binary Converter
|
Developer Tools | Open | |
|
HEX to CMYK Converter for Printing
|
Color Tools | Open | |
|
HEX to HSL Converter for CSS Theming
|
Color Tools | Open | |
|
HEX to HSV Color Converter
|
Color Tools | Open | |
|
HEX to HWB Converter for CSS Color 4
|
Color Tools | Open | |
|
HEX to LAB Color Converter (CIE L*a*b*)
|
Color Tools | Open | |
|
HEX to Pantone Approximator
|
Color Tools | Open | |
|
HEX to RAL Color Approximator
|
Color Tools | Open | |
|
HEX to RGB Converter
|
Color Tools | Open | |
|
HEX to RGBA Converter
|
Color Tools | Open | |
|
Hex to Text Converter (Advanced)
|
Text Tools | Open | |
|
HEX to XYZ Color Converter (CIE D65)
|
Color Tools | Open | |
|
Hexadecimal Text Decoder
|
Text Tools | Open | |
|
Hexadecimal to Base32 Converter
|
Math Calculators | Open | |
|
Hexadecimal to Base36 Converter
|
Math Calculators | Open | |
|
Hexadecimal to Base64 Converter
|
Math Calculators | Open | |
|
Hexadecimal to Binary Converter
|
Math Calculators | Open | |
|
Hexadecimal to Decimal Converter
|
Math Calculators | Open | |
|
Hexadecimal to Octal Converter
|
Math Calculators | Open | |
|
High Pass Filter Calculator
|
Electrical Tools | Open | |
|
High School GPA Calculator
|
Education | Open | |
|
HINT Vertigo Helper
|
Health & Fitness | Open | |
|
Hitbox Overlap Helper
|
Gaming Tools | Open | |
|
HIV Risk Assessment
|
Health & Fitness | Open | |
|
HJSON to JSON Converter
|
Developer Tools | Open | |
|
HKD to EUR Converter
|
Currency Converters | Open | |
|
HKD to GBP Converter
|
Currency Converters | Open | |
|
HKD to USD Converter
|
Currency Converters | Open | |
|
HMAC Calculator
|
Security & Privacy | Open | |
|
HMAC Generator
|
Developer Tools | Open | |
|
Hobbit Name Generator
|
Generators | Open | |
|
Hockey Corsi Calculator
|
Sports Tools | Open | |
|
Hockey Points Percentage
|
Sports Tools | Open | |
|
Hockey Save Percentage Calculator
|
Sports Tools | Open | |
|
Hohmann Transfer Calculator
|
Aerospace Tools | Open | |
|
Holmium Electron Configuration
|
Chemistry Tools | Open | |
|
Holmium Oxidation States
|
Chemistry Tools | Open | |
|
HOMA-IR Calculator
|
Health & Fitness | Open | |
|
HOMA-IR Insulin Resistance Calculator
|
Health & Fitness | Open |
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