Formatters
JSON Formatter
Format, beautify, and validate JSON data
Free Online Utility Tools That Work Offline
Generate secure UUIDs, format JSON/XML, calculate compound interest, and more. All tools work offline in your browser with complete privacy.
27
Tools Available
✓
Offline
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100% Private
Most Popular Tools
Our most-used tools
All Free Tools
Essential tools for developers, designers, finance professionals & everyday users
Formatters
JSON Formatter
Format, beautify, and validate JSON data
Formatters
XML Formatter
Format, validate, and beautify XML data
Converters
JSON ↔ YAML Converter
Convert between JSON and YAML formats instantly
Generators
UUID4 Generator
Generate random UUIDs
Generators
UUID3 Generator
Generate name-based UUIDs using MD5 hashing
Generators
UUID1 Generator
Generate time-based UUIDs with MAC address
Generators
UUID5 Generator
Generate name-based UUIDs using SHA-1 hashing
Generators
UUID6 Generator
Generate time-ordered UUIDs (reordered v1)
Generators
UUID7 Generator
Generate time-ordered UUIDs with random data
Generators
SSN Generator
Generate US Social Security Numbers for testing
Generators
CPF Generator
Generate Brazilian CPF numbers for testing
Generators
CNPJ Generator
Generate Brazilian CNPJ numbers for testing
Generators
Passport Generator
Generate US passport numbers for testing
Generators
EIN Generator
Generate US Employer Identification Numbers
Generators
ITIN Generator
Generate US Individual Taxpayer ID Numbers
Generators
Credit Card Generator
Generate valid credit card numbers for testing
Generators
Password Generator
Generate secure, random passwords
Generators
QR Code Generator
Generate QR codes for text, URLs, and data
Generators
Barcode Generator
Generate various barcode formats for products and inventory
Generators
Fancy Text Generator
Transform text into fancy Unicode styles for social media
Calculators
Compound Interest Calculator
Calculate compound interest and investment projections
Calculators
Retirement Calculator
Calculate how much you need to retire based on your income and savings goals
Calculators
Hours Calculator
Add and subtract hours and minutes to calculate time differences
Calculators
Age Calculator
Calculate your age in days, hours, minutes, and fun statistics
Converters
Image to PDF Converter
Convert images (PNG, JPEG, GIF, BMP, WebP) to PDF documents
Validators
CPF Validator
Validate Brazilian CPF numbers and identify issuing state
Validators
CNPJ Validator
Validate Brazilian CNPJ numbers (numeric & alphanumeric)
Why Use NanoUtil?
Tools that prioritize your privacy and productivity
100% Private
All data processing happens locally in your browser. No tracking, no data collection.
Instant Results
Fast processing with no server delays.
Works Offline
Full functionality on any device, any browser, even without internet.