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 |
|---|---|---|---|
|
Days Until Halloween
|
Date & Time | Open | |
|
Days Until Hanukkah
|
Date & Time | Open | |
|
Days Until Independence Day
|
Date & Time | Open | |
|
Days Until Juneteenth
|
Date & Time | Open | |
|
Days Until Labor Day
|
Date & Time | Open | |
|
Days Until Memorial Day
|
Date & Time | Open | |
|
Days Until Mother's Day
|
Date & Time | Open | |
|
Days Until New Year
|
Date & Time | Open | |
|
Days Until Passover
|
Date & Time | Open | |
|
Days Until Ramadan
|
Date & Time | Open | |
|
Days Until Rosh Hashanah
|
Date & Time | Open | |
|
Days Until St Patricks Day
|
Date & Time | Open | |
|
Days Until Summer Solstice
|
Date & Time | Open | |
|
Days Until Tet (Lunar New Year)
|
Date & Time | Open | |
|
Days Until Thanksgiving
|
Date & Time | Open | |
|
Days Until Valentine's Day
|
Date & Time | Open | |
|
Days Until Winter Solstice
|
Date & Time | Open | |
|
dB to Ratio Converter
|
Networking Tools | Open | |
|
dBFS to dB SPL Converter
|
Audio Tools | Open | |
|
dBm to Watts Calculator
|
Electrical Tools | Open | |
|
DCA Calculator (Dollar-Cost Averaging)
|
Finance Tools | Open | |
|
De Broglie Frequency Calculator
|
Science Tools | Open | |
|
De Broglie Wavelength Calculator
|
Science Tools | Open | |
|
De Broglie Wavelength Calculator
|
Physics Tools | Open | |
|
Debt Snowball Calculator
|
Finance Tools | Open | |
|
Debt to Equity Ratio Calculator
|
Economics Tools | Open | |
|
Debt-to-Income Calculator
|
Finance Tools | Open | |
|
Debye Length Calculator
|
Physics Tools | Open | |
|
Decades to Days Converter
|
Unit Converters | Open | |
|
Decades to Hours Converter
|
Unit Converters | Open | |
|
Decades to Microseconds Converter
|
Unit Converters | Open | |
|
Decades to Milliseconds Converter
|
Unit Converters | Open | |
|
Decades to Minutes Converter
|
Unit Converters | Open | |
|
Decades to Months Converter
|
Unit Converters | Open | |
|
Decades to Seconds Converter
|
Unit Converters | Open | |
|
Decades to Weeks Converter
|
Unit Converters | Open | |
|
Decades to Years Converter
|
Unit Converters | Open | |
|
Decathlon Score Calculator
|
Sports Tools | Open | |
|
December Birth Flower
|
Reference Tools | Open | |
|
December Birthstone
|
Reference Tools | Open | |
|
Decibel Calculator
|
Science Tools | Open | |
|
Decibel Distance Calculator
|
Science Tools | Open | |
|
Decibel FS Calculator
|
Audio Tools | Open | |
|
Decimal ASCII Code Decoder
|
Text Tools | Open | |
|
Decimal Odds Converter
|
Math Calculators | Open | |
|
Decimal Time Converter
|
Date & Time | Open | |
|
Decimal to Any Base Converter
|
Developer Tools | Open | |
|
Decimal to Base32 Converter
|
Math Calculators | Open |
Showing 1,921–1,968 of 8,445 tools