Free Online Tools for Developers & Daily Work.
An executive suite of powerful developer utilities, finance calculators, and productivity tools. 100% free, total privacy, no login required.
Developer Tools
JWT Decoder
Decode and visualize the content of JWT (JSON Web Token) tokens. Essential tool for developers working with authentication and APIs.
"typ": "JWT"
{
"sub": "1234567890",
"name": "John Doe",
"iat": 1516239022
Hash Calculator
Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) for any text. Essential tool for integrity verification and security.
...204e5603ec2
Diff Checker
Compare two texts side-by-side to find differences, additions, and deletions.
DNS Lookup
Check worldwide DNS propagation for any domain name.
UUID Generator v4
Generate version 4 Universally Unique Identifiers (UUIDs) in bulk quickly and securely. Ideal for databases, API keys, and object identification.
JSON Formatter & Validator
Format, validate, and minify your JSON code. Free tool for developers to organize messy JSON data.
{"id":101,"status":"success","data":{"user":"admin"}}
{
"id": 101,
"status": "success",
"data": {
"user": "admin"
}
}
Finance
ROI & Interest Calculator
Simulate your wealth growth with monthly contributions and compound interest.
Loan Calculator
Calculate monthly payments and total interest for loans and mortgages.
Compound Interest Calculator
Visualize how your investments grow over time with the power of compound interest.
Salary Converter
Convert your salary between hourly, daily, weekly, monthly, and yearly rates.
Fuel Calculator
Alcohol or Gasoline? Find out which one pays off.
Percentage Calculator
Calculate percentages, increases, and decreases easily.
Productivity
Pomodoro Timer
Boost your productivity with the Pomodoro technique. Focus for 25 minutes, take a break.
PDF Merger Secure
Merge multiple PDF files into one document securely in your browser.
Word Counter
Count words, characters, sentences, and paragraphs in real-time.
Password Generator
Create strong, secure passwords instantly.
Date Difference Calculator
Calculate the number of days, weeks, and months between two dates.
Unit Converter
Convert between different units of measurement: Length, Weight, Volume, and Temperature.
Design Tools
Color Palette Generator
Generate beautiful color palettes for your designs. Explore monochromatic, analogous, complementary, and triadic color schemes.
Color Converter
Convert colors between HEX, RGB, HSL, HSV, and CMYK formats. Essential tool for designers and front-end developers.
Why use our Free Online Developer Tools?
Your data, your control
We prioritize Client-Side processing. Your files and sensitive data like JSON formatting or JWT decoding never leave your browser.
Enterprise-grade security for daily online utilities. No tracking, no uploads, and absolutely no software to install.
Instant speed & Zero limits
No forced logins, no paywalls, and no usage limits for our essential web tools. A fluid, friction-free experience every time.
Modern architecture optimized for maximum performance. Instant loading calculators and code formatters so you never break your workflow.