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 & more. All tools work offline in your browser with complete privacy protection.
17
Tools Available
✓
Offline
🔒
100% Private
Most Popular Tools
Trusted by users monthly - these are our top-rated 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, beautify, and validate XML data
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
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
Converters
Image to PDF Converter
Convert images (PNG, JPEG, GIF, BMP, WebP) to PDF documents
Why Users Choose NanoUtil?
Professional-grade tools that prioritize your privacy and productivity
100% Private
All data processing happens locally in your browser. Zero tracking, zero data collection.
Instant Results
Sub-second processing with no server delays. Built for professionals who value speed.
Works Offline
Full functionality on any device, any browser, even without internet connection.