Professional tools that work in your browser

Free Developer Tools for Everyone Laboratory

Format JSON, encode Base64, generate UUIDs, and more. All tools are free, secure, and require no installation.

Most used tools by developers:

Browse all tools

No data leaves your device·Runs in-browser·No signup needed

Most searched

Popular Tools

Most used tools by developers

All Tools

JPG to PDF

Convert JPG and JPEG images to PDF format with custom...

tool4500K/mo

Try Now

QR Code Generator

Create professional QR codes for URLs, WiFi, contact cards, and...

tool1800K/mo

Try Now

Temporary Email Generator

Protect your primary inbox from spam and marketing by using...

tool1200K/mo

Try Now

PDF to Word

Convert PDF files to editable Word (DOCX) format...

tool

Try Now

BMI Calculator

Calculate your Body Mass Index (BMI) precisely using metric or...

tool

Try Now

JSON Formatter

Beautify, validate, and minify JSON data with professional syntax highlighting...

tool

Try Now

All Tools

Browse by Category

View all

Data & Conversion

JSON, CSV, XML formatting and data transformation tools

12 tools

JSON FormatterCSV to JSON GeneratorJSON to CSV Converter+9 more

Calculators

Financial, GST, and mathematical calculators

10 tools

BMI CalculatorAge CalculatorGST Calculator+7 more

Encoding & Security

Base64, JWT, Hash, and encryption/decryption utilities

7 tools

Base64 Encoder/DecoderURL Encoder/DecoderHTML Encoder/Decoder+4 more

Text & Format

Case converters, text diff, character counters

8 tools

String Case ConverterLorem Ipsum GeneratorHTML to Markdown+5 more

Generators

UUID, passwords, and random data generators

3 tools

Password GeneratorUUID GeneratorFavicon Generator

Barcode Tools

High-quality barcode generation for inventory and retail

1 tool

Barcode Generator

QR Code Tools

Customizable QR codes for URLs, WiFi, and digital cards

1 tool

QR Code Generator

Web & Design

Color pickers, CSS utilities, meta tag generators

5 tools

Image OptimizerColor PickerMeta Tag Generator+2 more

Dev Utilities

Regex tester, SQL formatter, timestamp converters

6 tools

Timestamp ConverterJS MinifierCSS Minifier+3 more

Formatters

Code, SQL, and Markup beautifiers

2 tools

SQL FormatterXML Formatter

Social Media

Instagram, LinkedIn, and social platform utilities

3 tools

Instagram Font GeneratorLinkedIn Post FormatterYouTube Timestamp Generator

PDF Tools

Convert, merge, and optimize PDF documents

5 tools

PDF to Word ConverterImage to PDF ConverterJPG to PDF Converter+2 more

Base64 Tools

Convert Base64 to PDF, Images, and other formats

5 tools

Base64 to PDFBase64 to GIFBase64 to PNG+2 more

AI Tools

Token counters, prompt optimizers, and AI utilities

1 tool

AI Prompt Token Counter

Marketing & SEO

UTM builders, link generators, and campaign tracking

2 tools

UTM BuilderWhatsApp Link Generator

Office & Admin

Email viewers, document utilities, and admin tools

2 tools

EML to HTML ConverterTemporary Email Generator

Transparent by design

Built for Privacy

No hidden costs. No data collection. No vendor lock-in.

0 Bytes

Your data never leaves your device

$0 / month

Free forever · No premium tier

8 Languages

Global reach, local experience

118 Free Developer Tools. 100% Private.

Real numbers — no invented stats

Free tools available

Client-side processing

Languages supported

Bytes of data collected

SSL Encrypted·GDPR Compliant·No cookies sold

Why Choose Karuvigal?

Six reasons developers love our platform

Instant Processing

Everything runs in your browser. No server delays, no waiting.

Private

Zero Data Storage

Your data never leaves your device. Complete privacy guaranteed.

Chain Tools Together

Smart workflow automation. Connect tools for complex operations.

Works Everywhere

Desktop, tablet, mobile ready. Code from anywhere.

No Signup Required

Start using tools immediately. No barriers, just productivity.

Dark Mode

Easy on your eyes during late coding sessions.

Built with ❤️ by developers who understand your needs

Interactive Demo

Try Our JSON Formatter

Interactive demo - format JSON in real-time

json-formatter.demo

{"user":{"id":1,"name":"John Doe","email":"john@example.com","roles":["admin","user"],"settings":{"theme":"dark","notifications":true}}}

Like what you see? Try the full-featured JSON formatter

View Full Tool

Discover Tools by Use Case

Find the right tool for your specific workflow

API Development

Tools for API testing and development

JSON Formatter

Format, validate and beautify JSON data with syntax highlighting

Try now

JWT Decoder

Decode and validate JSON Web Tokens (JWT)

Try now

Base64 Encoder/Decoder

Encode and decode Base64 strings with file support

Try now

URL Encoder/Decoder

Encode and decode URL components and query parameters

Try now

UUID Generator

Batch generate universally unique identifiers (v1, v4, v7) for secure systems and sortable databases.

Try now

💡 Pro tip: You can chain these tools together for complex workflows. Try formatting JSON, then encoding it to Base64 for API transmission.

The Complete Developer Toolbox You've Been Looking For

Karuvigal brings together 118 essential developer tools in one fast, privacy-focused platform. Whether you need to format JSON, decode Base64, generate UUIDs, or validate JWTs, we've got you covered. Our tools are designed to save you time and streamline your development workflow.

Built for Developers, by Developers

Every tool is optimized for speed and accuracy. No ads cluttering your workspace, no tracking cookies following you around, no mandatory signups blocking your access. Just pure functionality that respects your privacy and time. We understand the frustration of bloated tool sites, so we built something better.

🚀 Lightning Fast

All tools run directly in your browser. No server round-trips, no waiting for responses. Process megabytes of data in milliseconds.

🔒 100% Private

Your data never leaves your browser. No cloud storage, no analytics tracking, no data mining. Complete privacy guaranteed.

🔗 Tool Chaining

Connect tools together for complex workflows. Format JSON, then encode to Base64, then generate a hash - all in one seamless flow.

📱 Works Everywhere

Responsive design that works perfectly on desktop, tablet, and mobile. Use Karuvigal wherever you code.

Frequently Asked Questions

Ready to supercharge your development workflow?

Join hundreds of developers who use Karuvigal daily. No signup required, just pick a tool and start coding smarter.

Join thousands of developers who trust Karuvigal

Start Building, Right Now

Free, fast, and secure developer tools. No signup required.

Most-searched tools:

JPG to PDF Converter QR Code Generator Temporary Email Generator PDF to Word Converter BMI Calculator JSON Formatter Age Calculator Image Optimizer

Explore All Tools

No signup · Free forever · 100% Private

The Complete Developer Toolbox You've Been Looking For

Built for Developers, by Developers

🚀 Lightning Fast

All tools run directly in your browser. No server round-trips, no waiting for responses. Process megabytes of data in milliseconds.

🔒 100% Private

Your data never leaves your browser. No cloud storage, no analytics tracking, no data mining. Complete privacy guaranteed.

🔗 Tool Chaining

Connect tools together for complex workflows. Format JSON, then encode to Base64, then generate a hash - all in one seamless flow.

📱 Works Everywhere

Responsive design that works perfectly on desktop, tablet, and mobile. Use Karuvigal wherever you code.

Frequently Asked Questions

Ready to supercharge your development workflow?

Join hundreds of developers who use Karuvigal daily. No signup required, just pick a tool and start coding smarter.