What types of tools are available on this website?

We offer 182+ free online tools including converters (Base64, JSON, YAML, temperature, case), generators (password, hash, QR code, UUID), calculators (math, percentage, fraction), text tools (formatters, analyzers), image tools (resizer, compressor), and productivity tools (timers, planners). All tools work directly in your browser without registration.

Are all tools completely free to use?

Yes, all our tools are completely free to use. There are no hidden fees, premium features, or usage limits. You can use any tool as many times as you need without creating an account or providing personal information.

Do I need to create an account to use the tools?

No account creation is required. All tools work directly in your browser without any setup, registration, or login. Simply visit the tool page and start using it immediately.

Is my data safe and private when using these tools?

Yes. Most tools run directly in your browser, and we avoid storing your inputs. We may collect limited, privacy-focused analytics (such as page views) to improve the site.

Do these tools work on mobile devices?

Yes, all our tools are fully responsive and optimized for mobile devices. They work seamlessly on desktop, tablet, and mobile browsers, providing the same functionality across all platforms.

How often are new tools added?

We regularly add new tools based on user feedback and emerging needs. Our collection has grown from a few basic tools to over 70 professional utilities, and we continue to expand our offerings.

Online Tools & Utilities

Free, fast, and easy-to-use web tools for everyone. Streamline your workflow with our comprehensive suite of 182+ utilities.

Try these first — permeability, salinity, molarity, JWT, text-to-speech and more

Molarity Converter JSON Formatter & Validator JWT Decoder / Encoder Notepad ASCII / Unicode Lookup Hardness Scale Converter

🎉 Major Milestone Achieved!

We've reached an incredible milestone with our growing collection of developer tools

182+

Total Tools

Unit Converters

Building a Production CLI Tool with Node.js

Ship a production-ready CLI in days, not weeks.

Master the art of building professional command-line tools. From scaffolding to publishing—learn best practices, testing, and deployment strategies used in production.

Production-ready patterns
Testing, CI, and npm publish
Real-world examples

PDF · Instant download · Opens Gumroad — secure checkout

Find the Perfect Tool

182+ Tools

Search through our collection of tools or browse by category to find exactly what you need

Browse by category

Top categories:Utilities46Engineering Converters15Electricity Converters15Fluids Converters14Productivity13Common Converters11

From the makers

Our products

SaaS tools and books we build alongside Rapid Tools Online — same quality bar, built for real workflows.

SaaS

SuperApps

Build custom internal apps with tables, calendar, gallery, and more—no code required. Streamline ops and data in one place.

Explore SuperApps

Pakistan · B2B

Wateronix

Water delivery management for large RO plants in Pakistan: routes, billing, drivers, and reporting—built for serious operations, not chat threads.

See Wateronix

Book

Production CLI with Node.js (PDF)

Also in our catalog: ship a production-ready command-line tool—from scaffolding to tests and publish. Same guide promoted site-wide; grab it here too.

View on Gumroad

Popular Tools

Most used converters and utilities — free, instant, no sign-up

PopularFeb 2, 2026

Molarity Converter

Convert between molarity units including mol/L, g/L, ppm, and % solution. Essential for chemistry labs, biology research, and pharmaceutical industry.

JSON Formatter & Validator

Format, validate, and minify JSON data with syntax highlighting and error detection

JWT Decoder / Encoder

Decode, encode, and verify JWT with HS256 or RS256. Explain standard claims in plain language.

Notepad

Create, edit, save and manage notes directly in your browser.

ASCII / Unicode Lookup

Look up characters by code point or by character. Browse the ASCII table (0–127) with names and copy codes instantly

Hardness Scale Converter

Convert between different hardness scales including Mohs, Rockwell, Vickers, and Brinell. Essential for materials science, metallurgy, and quality control.

Heat Transfer Converter

Convert between heat transfer coefficient units including W/m²·K, BTU/hr·ft²·°F, cal/s·cm²·°C, and more. Perfect for engineering, HVAC, construction, and thermal analysis

Countdown Timer

Set custom countdown timers with pause, resume, and audio alerts. Perfect for productivity and time management

Color Converter

Convert between HEX, RGB, HSL color formats

Browse by industry

Agriculture Construction Design & Creative Education Energy & Utilities Engineering Finance & Banking Government & Public Sector All industries →

Format and validate YAML with consistent indentation. No conversion to JSON.

Utilities

🆕 Just AddedMar 22

View all tools (182)

Latest Articles

Read our latest insights on web development, programming tips, and industry best practices.

Latest

11 min read

Salinity and TDS: From Basics to Advanced Concepts

Understand salinity and TDS from basics to advanced: PSU, ppm, mg/L, conductivity. Convert units with our free Salinity/TDS converter—no sign-up required.

How to Format JSON Online (Free and Easy)

Format, validate, and minify JSON in your browser with a free online tool. No sign-up required—paste your JSON and get readable, validated output in seconds.

Free Base64 Encoder and Decoder Online: How to Use

Encode text to Base64 and decode Base64 strings in your browser. Free online tool for developers, no installation or account required.

Zain Shaikh

February 18, 2025

base64