Karuvigal Blog
Free guides and tutorials for our online tools. Learn how to generate barcodes, QR codes, format JSON, and create UUIDs.
Tool Categories
Barcode
Generate professional 1D barcodes for retail, inventory, and shipping
QR Code
Create scannable QR codes for URLs, text, and contact information
JSON
Format, validate, and transform JSON data with ease
UUID
Generate RFC-compliant unique identifiers for your applications
Password
Generate strong, secure passwords, PINs, and hashes to protect your digital identity
Calculator
Converter
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Code 128 Generator - Free Online Tool
Generate Code 128 barcodes instantly with our free tool. High-quality, printable, customizable. Perfect for inventory and retail.
Code 39 Generator - Free Online Tool
Generate Code 39 barcodes instantly with our free tool. High-quality, printable, customizable. Perfect for inventory and retail.
EAN-13 Generator - Free Online Tool
Generate EAN-13 barcodes instantly with our free tool. High-quality, printable, customizable. Perfect for inventory and retail.
EAN-8 Generator - Free Online Tool
Generate EAN-8 barcodes instantly with our free tool. High-quality, printable, customizable. Perfect for inventory and retail.
UPC-A Generator - Free Online Tool
Generate UPC-A barcodes instantly with our free tool. High-quality, printable, customizable. Perfect for inventory and retail.
UPC-E Generator - Free Online Tool
Generate UPC-E barcodes instantly with our free tool. High-quality, printable, customizable. Perfect for inventory and retail.
Social Generator - Free Online Tool
Create Social QR codes free. Instant generation, custom styling, high-resolution output. Scan-ready codes.
Payments Generator - Free Online Tool
Create Payments QR codes free. Instant generation, custom styling, high-resolution output. Scan-ready codes.
Google Generator - Free Online Tool
Create Google QR codes free. Instant generation, custom styling, high-resolution output. Scan-ready codes.
Messaging Generator - Free Online Tool
Create Messaging QR codes free. Instant generation, custom styling, high-resolution output. Scan-ready codes.
Media Generator - Free Online Tool
Create Media QR codes free. Instant generation, custom styling, high-resolution output. Scan-ready codes.
Utility Generator - Free Online Tool
Create Utility QR codes free. Instant generation, custom styling, high-resolution output. Scan-ready codes.
JSON Formatter - Free Online Tool
Format, validate, and beautify JSON data online. Free JSON formatter with syntax highlighting and error detection.
Version 7 Generator - Free Online Tool
Generate Version 7 UUIDs instantly. Free, secure, RFC-compliant unique identifiers for databases and APIs.
Version 5 Generator - Free Online Tool
Generate Version 5 UUIDs instantly. Free, secure, RFC-compliant unique identifiers for databases and APIs.
Version 4 Generator - Free Online Tool
Generate Version 4 UUIDs instantly. Free, secure, RFC-compliant unique identifiers for databases and APIs.
Version 3 Generator - Free Online Tool
Generate Version 3 UUIDs instantly. Free, secure, RFC-compliant unique identifiers for databases and APIs.
Version 1 Generator - Free Online Tool
Generate Version 1 UUIDs instantly. Free, secure, RFC-compliant unique identifiers for databases and APIs.
Generator Generator - Free Online Tool
Generate strong, secure Generator instantly. Client-side, privacy-focused password tool for better security.
Strength Check Generator - Free Online Tool
Generate strong, secure Strength Check instantly. Client-side, privacy-focused password tool for better security.
Passphrase Generator - Free Online Tool
Generate strong, secure Passphrase instantly. Client-side, privacy-focused password tool for better security.
WiFi Generator - Free Online Tool
Generate strong, secure WiFi instantly. Client-side, privacy-focused password tool for better security.
Bulk Generator - Free Online Tool
Generate strong, secure Bulk instantly. Client-side, privacy-focused password tool for better security.
PIN Generator - Free Online Tool
Generate strong, secure PIN instantly. Client-side, privacy-focused password tool for better security.
Hash Generator - Free Online Tool
Generate strong, secure Hash instantly. Client-side, privacy-focused password tool for better security.
Pattern Generator - Free Online Tool
Generate strong, secure Pattern instantly. Client-side, privacy-focused password tool for better security.
Entropy Generator - Free Online Tool
Generate strong, secure Entropy instantly. Client-side, privacy-focused password tool for better security.