What types of tools are available on this website?

We offer 150+ 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 154+ utilities.

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

Permeability Converter Salinity/TDS Converter Molarity Converter Heat Transfer Converter JSON Formatter & Validator JWT Decoder / Encoder

🎉 Major Milestone Achieved!

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

154+

Total Tools

Unit Converters

Building a Production CLI Tool with Node.js

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 & deployment
Real-world examples

PDF · Instant download

Find the Perfect Tool

154+ Tools

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

Browse by category

Top categories:Utilities32Electricity Converters15Engineering Converters13Fluids Converters13Common Converters11Heat Converters10

Popular Tools

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

PopularDec 14

Permeability Converter

Convert between permeability units including m², darcy, millidarcy, and more. Essential for petroleum engineering and porous media flow

Salinity/TDS Converter

Convert between salinity and total dissolved solids units including PSU, g/kg, mg/L, and more

Molarity Converter

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

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

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.

Text to Speech

Convert text to speech with natural-sounding voices, adjustable speed, pitch, and volume controls

HTML ⇄ Entities Converter

Encode and decode HTML entities

Notepad

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

Password Generator

Generate secure, random passwords with customizable length, character types, and strength indicators

Browse by industry

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

🎉Celebrating 154+ tools milestone! New tools added regularly.

✨ New Tools

12 new tools

OpenAPI / Swagger Spec Validator

Validate OpenAPI 3.x and Swagger 2.0 specs (YAML or JSON). Check required fields and structure.

Utilities

🆕 Just AddedMar 7

MIME Type Lookup

Look up MIME type from file extension or extension from MIME type. Browse common types.

Utilities

🆕 Just AddedMar 6

Meeting Agenda Generator

Create copyable agendas for standups, sprint planning, retros, 1:1s, and kickoffs. Set duration and project name.

Productivity

🆕 Just AddedMar 4

Markdown Table Generator

Convert CSV or tab-separated data into a Markdown table. Paste data, choose alignment, copy the result.

Productivity

🆕 Just AddedMar 3

JSON Schema Validator

Validate JSON data against a JSON Schema. See errors with path and message.

Utilities

🆕 Just AddedMar 1

IP Subnet Calculator

Calculate subnet mask, network address, usable range, and broadcast from CIDR notation (e.g. 192.168.1.0/24).

Utilities

🆕 Just AddedFeb 28

INI Formatter and Validator

Format and validate INI config files. [section] and key=value, optional sort, no duplicate keys.

Utilities

🆕 Just AddedFeb 27

Image Compressor

Compress and optimize images in your browser. Reduce file size with quality control, format conversion (JPEG, PNG, WebP), and optional resize. All processing client-side.

Utilities

🆕 Just AddedFeb 25