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 |
|---|---|---|---|
|
Board Foot Calculator
|
Agriculture Tools | Open | |
|
Board Game Score Tracker
|
Gaming Tools | Open | |
|
Boat Fuel Range Calculator
|
Marine Tools | Open | |
|
Boat Speed Calculator
|
Engineering Tools | Open | |
|
BOD Load Calculator
|
Engineering Tools | Open | |
|
BODE Index COPD Calculator
|
Health & Fitness | Open | |
|
Bode Plot Helper
|
Engineering Tools | Open | |
|
Body Fat Calculator
|
Health & Fitness | Open | |
|
Body Measurement Tracker
|
Beauty Tools | Open | |
|
Body Recomposition Calculator
|
Fitness Tools | Open | |
|
Body Surface Area (DuBois Formula) Calculator
|
Health & Fitness | Open | |
|
Body Surface Area Calculator
|
Health & Fitness | Open | |
|
Body Surface Area Calculator (Mosteller)
|
Health & Fitness | Open | |
|
Body Surface Area for Chemotherapy
|
Health & Fitness | Open | |
|
Bohr Model Energy Levels Calculator
|
Physics Tools | Open | |
|
Boiler Efficiency Calculator
|
HVAC Tools | Open | |
|
Boiling Point Elevation Calculator
|
Chemistry Tools | Open | |
|
Bokeh Calculator
|
Photography Tools | Open | |
|
Bold Text Generator
|
Symbols & Unicode | Open | |
|
Bold Unicode Text
|
Text Tools | Open | |
|
Bolt Shear Strength Calculator
|
Engineering Tools | Open | |
|
Bolt Torque Calculator
|
Construction Tools | Open | |
|
Bomb Calorimetry Calculator
|
Chemistry Tools | Open | |
|
Bond Convexity Calculator
|
Finance Tools | Open | |
|
Bond Dissociation Energy
|
Chemistry Tools | Open | |
|
Bond Duration Calculator
|
Economics Tools | Open | |
|
Bond Energy Calculator
|
Chemistry Tools | Open | |
|
Bond Equivalent Yield Calculator
|
Finance Tools | Open | |
|
Bond Order Calculator
|
Chemistry Tools | Open | |
|
Bond Price Calculator
|
Finance Tools | Open | |
|
Bond Price Calculator
|
Finance Tools | Open | |
|
Bond Yield Calculator
|
Finance Tools | Open | |
|
Bone Density T-Score Calculator
|
Health & Fitness | Open | |
|
Bonferroni Correction Calculator
|
Statistics Tools | Open | |
|
Bonus Tax Calculator
|
HR & Payroll | Open | |
|
Book Page Estimator
|
Writing Tools | Open | |
|
Book Spine Width Calculator
|
Number Tools | Open | |
|
Book Value Calculator
|
Finance Tools | Open | |
|
Book-to-Market Ratio Calculator
|
Accounting Tools | Open | |
|
Booklet Page Calculator
|
Printing Tools | Open | |
|
Boolean Algebra Simplifier
|
Math Calculators | Open | |
|
Boost Converter Calculator
|
Electrical Tools | Open | |
|
Border Radius Generator
|
Developer Tools | Open | |
|
Boron Electron Configuration
|
Chemistry Tools | Open | |
|
Boron Element Properties
|
Chemistry Tools | Open | |
|
Boron Oxidation States
|
Chemistry Tools | Open | |
|
Bose-Einstein Distribution Calculator
|
Physics Tools | Open | |
|
Bounce Rate Impact Calculator
|
Marketing Tools | Open |
Showing 817–864 of 8,451 tools