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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 |
|---|---|---|---|
|
Internal Energy Calculator
|
Physics Tools | Open | |
|
Interpolation Rate Calculator
|
DSP Tools | Open | |
|
Interquartile Range Calculator
|
Math Calculators | Open | |
|
Interrobang Symbol
|
Symbols & Unicode | Open | |
|
Intersection Symbol
|
Symbols & Unicode | Open | |
|
Interval Ratio Calculator
|
Music Tools | Open | |
|
Interval Timer
|
Date & Time | Open | |
|
Intraclass Correlation Calculator
|
Statistics Tools | Open | |
|
Intraocular Pressure Correction Calculator
|
Health & Fitness | Open | |
|
Inventory Days Calculator
|
Economics Tools | Open | |
|
Inventory Turnover Calculator
|
E-Commerce Tools | Open | |
|
Inverse Kinematics 2DOF
|
Engineering Tools | Open | |
|
Inverse Laplace Calculator
|
Math Calculators | Open | |
|
Inverse Square Flash Calculator
|
Photography Tools | Open | |
|
Inverse Square Law Calculator
|
Physics Tools | Open | |
|
Inverted Exclamation Mark
|
Symbols & Unicode | Open | |
|
Inverted Question Mark
|
Symbols & Unicode | Open | |
|
Inverter Clipping Loss Calculator
|
Energy Tools | Open | |
|
Inverter Size Calculator
|
Electrical Tools | Open | |
|
Inverting Amplifier Calculator
|
Electrical Tools | Open | |
|
Investment Calculator
|
Finance Tools | Open | |
|
Invisible Text Generator
|
Text Tools | Open | |
|
Invoice Generator
|
Productivity | Open | |
|
Iodine Electron Configuration
|
Chemistry Tools | Open | |
|
Iodine Element Properties
|
Chemistry Tools | Open | |
|
Iodine Oxidation States
|
Chemistry Tools | Open | |
|
IOL Power Helper
|
Health & Fitness | Open | |
|
IOPS Calculator for Storage
|
Databases | Open | |
|
IP Address Checker
|
Security & Privacy | Open | |
|
IP Address to Binary Converter
|
Developer Tools | Open | |
|
IP Address to Binary Converter
|
Networking Tools | Open | |
|
IP Range to CIDR
|
Networking Tools | Open | |
|
IP Subnet Calculator
|
Developer Tools | Open | |
|
IP to Decimal Converter
|
Networking Tools | Open | |
|
IP To Hex Converter
|
Networking Tools | Open | |
|
IPA Transcription Helper
|
Language Tools | Open | |
|
IPF GL Points Calculator
|
Fitness Tools | Open | |
|
IPI Lymphoma Score
|
Health & Fitness | Open | |
|
IPL Net Run Rate Calculator
|
Sports Tools | Open | |
|
IPSS Prostate Symptom Score
|
Health & Fitness | Open | |
|
IPSS-R MDS Score
|
Health & Fitness | Open | |
|
IPv4 Address Regex Tester
|
Developer Tools | Open | |
|
IPv4 to IPv6 Converter
|
Networking Tools | Open | |
|
IPv6 Address Regex Tester
|
Developer Tools | Open | |
|
IPv6 Expander
|
Networking Tools | Open | |
|
IPv6 Subnet Calculator
|
Networking Tools | Open | |
|
IR Spectroscopy Helper
|
Chemistry Tools | Open | |
|
Ireland Capital Gains Tax Calculator
|
Finance Tools | Open |
Showing 3,649–3,696 of 8,445 tools