Free Online Utilities

Browser-based developer tools and utilities. Fast, private, and works offline. No data is sent to any server.

47 tools available 8 categories 100% client-side
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Data Format & Encoding

JSON, Base64, URL encoding, and data converters

JSON Formatter
Format, validate, and beautify JSON
Base64 Encoder/Decoder
Encode and decode Base64 strings
URL Encoder/Decoder
Encode and decode URL components
HTML Entity Encoder
Convert special characters to HTML entities
JSON to CSV
Convert JSON arrays to CSV format
CSV to JSON
Convert CSV data to JSON format
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Text Manipulation

Case converters, counters, and text transformations

Character Counter
Count words, characters, and sentences
Lorem Ipsum Generator
Generate placeholder text
Diff Checker
Compare text and find differences
Case Converter
Convert text to different cases
Slug Generator
Convert text to URL-friendly slugs
Text to ASCII Art
Convert text to ASCII art
Word Frequency Counter
Analyze word frequency in text
Reading Time Estimator
Calculate reading time for content
Line Number Adder
Add line numbers to text
Text Reverser
Reverse text by characters, words, or lines
List Sorter
Sort lists alphabetically or numerically
Duplicate Line Remover
Remove duplicate lines from text
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Generators

UUID, passwords, QR codes, and more

UUID Generator
Generate UUID v1, v4, v5, v7
Password Generator
Create secure random passwords
QR Code Generator
Generate QR codes from text or URLs
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512
Password Strength Checker
Analyze password security and entropy
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Math & Conversion

Number converters, calculators, and unit tools

Number Base Converter
Convert binary, octal, decimal, hex
Unit Converter
Convert length, weight, temperature
Aspect Ratio Calculator
Calculate aspect ratios for images/video
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Developer Tools

Code formatting, regex testing, and dev utilities

Regex Tester
Test and debug regular expressions
Timestamp Converter
Convert Unix timestamps to dates
JWT Decoder
Decode and inspect JSON Web Tokens
Markdown Preview
Live preview Markdown content
Cron Expression Parser
Parse cron to human-readable format
Markdown Table Generator
Create Markdown tables visually
Meta Tag Generator
Generate SEO and social media meta tags
HTML Minifier
Minify HTML code to reduce file size
CSS Minifier
Minify CSS code to reduce file size
JavaScript Minifier
Minify JavaScript code to reduce file size
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Color Tools

Color pickers, converters, and palette generators

Color Converter
Convert HEX, RGB, HSL
Color Picker
Pick colors and convert formats
Contrast Checker
Check WCAG color contrast
Gradient Generator
Create CSS gradients visually
Box Shadow Generator
Create CSS box shadows visually
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Image Tools

Image conversion, compression, and SVG utilities

Image to Base64
Convert images to Base64 strings
SVG Viewer
Preview and inspect SVG files
Image Compressor
Compress images to reduce size
Favicon Generator
Generate favicons from images
Placeholder Image Generator
Generate placeholder images with custom dimensions
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Miscellaneous

Other useful utilities and tools

Emoji Picker
Search and copy emojis

Your Privacy Matters

All utilities run entirely in your browser. Your data never leaves your device, making these tools safe for sensitive information.

✓ No server uploads ✓ Works offline ✓ No tracking ✓ No signup required