Free online tools, private by design
QuickTools Hub gives you 30 calculators, converters, text, image, QR and security tools that run entirely in your browser. No sign-up. No uploads. No waiting.
All tools
QR & Barcode Tools
QR Code Generator
Generate and download QR codes for text, URLs, Wi-Fi and contact data.
Calculators
Percentage Calculator
Find percentages, percentage change and percentage difference with the formula shown.
Productivity Tools
Random Number Generator
Generate random integers or decimals in a range, with or without repeats.
Text Tools
Word Counter
Count words, characters, sentences, paragraphs and reading time instantly.
Calculators
BMI Calculator
Calculate Body Mass Index from height and weight in metric or imperial units.
Date & Time Tools
Age Calculator
Calculate exact age in years, months and days from a date of birth.
Password & Security
Password Generator
Generate strong passwords locally with crypto.getRandomValues.
Image Tools
Image Compressor
Compress JPG, PNG and WebP images in your browser with adjustable quality.
Calculators
Standard Calculator
Perform addition, subtraction, multiplication and division with keyboard support.
Calculators
Scientific Calculator
Evaluate scientific expressions with sin, cos, log, sqrt, powers and parentheses - safely parsed, never eval().
Developer Tools
JSON Formatter & Validator
Format, validate, minify and inspect JSON with readable error messages.
QR & Barcode Tools
QR Code Scanner
Scan QR codes from an uploaded image or your camera, with permission controls.
Date & Time Tools
Date Difference Calculator
Calculate days, weeks, months and years between two dates.
QR & Barcode Tools
Barcode Generator
Generate CODE128, EAN-13, UPC and CODE39 barcodes and download them.
Text Tools
Case Converter
Convert text to upper, lower, title, sentence, camel, snake or kebab case.
Text Tools
Remove Duplicate Lines
Remove repeated lines while keeping first or last occurrence order.
Text Tools
Text Reverser
Reverse text by characters, words or lines.
Text Tools
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences or words with configurable counts.
Text Tools
Text Diff Checker
Compare two texts line by line and highlight added, removed and unchanged lines.
Developer Tools
URL Encoder / Decoder
Encode and decode URL components safely with encodeURIComponent.
Developer Tools
Base64 Encoder / Decoder
Encode text to Base64 and decode Base64 back to UTF-8 text with validation.
Image Tools
Image Resizer
Resize images by pixels or percentage, keeping aspect ratio when you want.
Image Tools
Image Format Converter
Convert images between PNG, JPG and WebP where your browser supports it.
Image Tools
Image Cropper
Crop images by dragging a selection rectangle and download the result.
Password & Security
Password Strength Estimator
Estimate password strength locally from length, variety and common patterns.
Password & Security
UUID Generator
Generate random UUID v4 values in bulk using crypto.randomUUID where available.
Password & Security
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes with Web Crypto.
Unit Converters
Unit Converter
Convert length, mass, temperature, area, volume, speed and data units.
Date & Time Tools
Time Zone Converter
Convert a date and time between world time zones using the Intl API.
Audio & Accessibility
Text to Speech
Read text aloud with browser voices, adjustable rate and pitch.
Most searched tools
Our highest-demand tools: free QR code generator, percentage calculator, random number generator and word counter - plus the BMI calculator, age calculator, image compressor and password generator people use every day.
QR & Barcode Tools
QR Code Generator
Generate and download QR codes for text, URLs, Wi-Fi and contact data.
Calculators
Percentage Calculator
Find percentages, percentage change and percentage difference with the formula shown.
Productivity Tools
Random Number Generator
Generate random integers or decimals in a range, with or without repeats.
Text Tools
Word Counter
Count words, characters, sentences, paragraphs and reading time instantly.
Calculators
BMI Calculator
Calculate Body Mass Index from height and weight in metric or imperial units.
Password & Security
Password Generator
Generate strong passwords locally with crypto.getRandomValues.
Featured tools
QR & Barcode Tools
QR Code Generator
Generate and download QR codes for text, URLs, Wi-Fi and contact data.
Text Tools
Word Counter
Count words, characters, sentences, paragraphs and reading time instantly.
Password & Security
Password Generator
Generate strong passwords locally with crypto.getRandomValues.
Image Tools
Image Compressor
Compress JPG, PNG and WebP images in your browser with adjustable quality.
Calculators
Standard Calculator
Perform addition, subtraction, multiplication and division with keyboard support.
Developer Tools
JSON Formatter & Validator
Format, validate, minify and inspect JSON with readable error messages.
Recently added
Password & Security
Password Strength Estimator
Estimate password strength locally from length, variety and common patterns.
Password & Security
UUID Generator
Generate random UUID v4 values in bulk using crypto.randomUUID where available.
Password & Security
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes with Web Crypto.
Unit Converters
Unit Converter
Convert length, mass, temperature, area, volume, speed and data units.
Date & Time Tools
Time Zone Converter
Convert a date and time between world time zones using the Intl API.
Audio & Accessibility
Text to Speech
Read text aloud with browser voices, adjustable rate and pitch.
Browse by category
Calculators
Everyday and scientific calculators with formulas shown.
4 tools →
Text Tools
Count, convert, clean and compare text.
6 tools →
Image Tools
Compress, resize, convert and crop images locally.
4 tools →
QR & Barcode Tools
Create and read QR codes and barcodes.
3 tools →
Password & Security
Generate passwords, UUIDs and hashes - all locally.
4 tools →
Date & Time Tools
Ages, date differences and time-zone conversion.
3 tools →
Unit Converters
Reliable conversions for common units.
1 tools →
Developer Tools
JSON, Base64, URL and diff utilities for builders.
3 tools →
Productivity Tools
Small helpers that save time every day.
1 tools →
Audio & Accessibility
Speech and accessibility-friendly utilities.
1 tools →
How privacy works here
Every tool on this site processes your input on your own device using standard browser APIs. Your text is not sent to our servers, your images are not uploaded, and generated passwords are never stored, logged or put in a URL. You can even disconnect from the internet after the page loads and most tools will keep working.