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 |
|---|---|---|---|
|
Smith Chart Helper
|
Networking Tools | Open | |
|
Smoke Control Airflow Calculator
|
Engineering Tools | Open | |
|
Smoking Pack Years Calculator
|
Health & Fitness | Open | |
|
Smoking Wood Guide
|
Food & Cooking | Open | |
|
SMS QR Code Generator
|
Generators | Open | |
|
snake_case Converter
|
Text Tools | Open | |
|
Snell's Law Calculator
|
Science Tools | Open | |
|
Snell's Law Refraction Calculator
|
Physics Tools | Open | |
|
Snellen Acuity Converter
|
Health & Fitness | Open | |
|
Snow Load Calculator
|
Construction Tools | Open | |
|
Snow To Water Ratio Calculator
|
Weather Tools | Open | |
|
Snow Water Equivalent Calculator
|
Science Tools | Open | |
|
Snowflake ID Decoder
|
Developer Tools | Open | |
|
Snowflake ID Generator
|
Developer Tools | Open | |
|
Snowflake Symbol
|
Symbols & Unicode | Open | |
|
SNR from Bit Depth Calculator
|
DSP Tools | Open | |
|
Snubber Circuit Calculator
|
Electrical Tools | Open | |
|
Soap Lye Calculator
|
Home & DIY | Open | |
|
Soccer Points Calculator
|
Sports Tools | Open | |
|
Soccer xG Helper (Expected Goals)
|
Sports Tools | Open | |
|
Social Share Link Generator
|
SEO Tools | Open | |
|
Sod Calculator
|
Agriculture Tools | Open | |
|
Sodium Correction for Glucose Calculator
|
Health & Fitness | Open | |
|
Sodium Correction Rate Calculator
|
Health & Fitness | Open | |
|
Sodium Deficit Calculator
|
Health & Fitness | Open | |
|
Sodium Electron Configuration
|
Chemistry Tools | Open | |
|
Sodium Element Properties
|
Chemistry Tools | Open | |
|
Sodium Intake Checker
|
Health & Fitness | Open | |
|
Sodium Oxidation States
|
Chemistry Tools | Open | |
|
Sodium Potassium Ratio
|
Health & Fitness | Open | |
|
SOFA Organ Failure Assessment
|
Health & Fitness | Open | |
|
SOFA Score Calculator
|
Health & Fitness | Open | |
|
Soil Bearing Capacity Calculator
|
Engineering Tools | Open | |
|
Soil Classification Tool
|
Science Tools | Open | |
|
Soil Liquefaction Potential Calculator
|
Engineering Tools | Open | |
|
Soil Moisture Calculator
|
Agriculture Tools | Open | |
|
Soil Texture Calculator
|
Agriculture Tools | Open | |
|
Soil Unit Weight Calculator
|
Engineering Tools | Open | |
|
Sokal CML Prognostic Score
|
Health & Fitness | Open | |
|
Solana to EUR Converter
|
Currency Converters | Open | |
|
Solana to GBP Converter
|
Currency Converters | Open | |
|
Solana to USD Converter
|
Currency Converters | Open | |
|
Solana to VND Converter
|
Currency Converters | Open | |
|
Solar Battery Bank Size Calculator
|
Electrical Tools | Open | |
|
Solar Charge Controller Sizing Calculator
|
Electrical Tools | Open | |
|
Solar Constant Calculator
|
Astrophysics Tools | Open | |
|
Solar Eclipse Calculator
|
Space & Astronomy | Open | |
|
Solar Irradiance Calculator
|
Engineering Tools | Open |
Showing 6,673–6,720 of 8,451 tools