Free online tools, private by design — no sign-up, no uploads.
QuikTools Hub gives you 38 free calculators, converters, text, image, QR and security tools that run entirely in your browser, so your files and text never leave your device.
All tools
QR & Barcode Tools
QR Code Generator
Create QR codes for links, Wi-Fi, contact cards or text and download a print-ready PNG. Free, no sign-up, nothing uploaded.
Calculators
Percentage Calculator
Find what X% of a number is, work out percentage increase, decrease and change, and compare two values with percentage difference.
Productivity Tools
Random Number Generator
Pick random integers or decimals in any range, with a no-repeats option for lottery draws, raffles and giveaway winners.
Text Tools
Word Counter
Count words, characters, sentences and paragraphs as you type, with reading and speaking time estimates. Your text is never uploaded.
Calculators
BMI Calculator
Calculate Body Mass Index from height and weight in metric or imperial units, with your WHO category shown instantly as you type.
Date & Time Tools
Age Calculator
Calculate your exact chronological age in years, months and days from your date of birth, plus your total age counted in days.
Password & Security
Password Generator
Create strong random passwords on your own device with secure randomness - up to 128 characters, one at a time or in bulk.
Image Tools
Image Compressor
Compress JPG, PNG and WebP images in your browser with an adjustable quality slider, before/after sizes and no uploads.
Calculators
Standard Calculator
Add, subtract, multiply and divide full expressions with correct order of operations, parentheses and keyboard support. Free, in your browser.
Calculators
Scientific Calculator
Evaluate full expressions with trig, logarithms, roots, powers and parentheses - parsed safely in your browser, with a history of your last five calculations.
Developer Tools
JSON Formatter & Validator
Beautify, validate and minify JSON locally: 2-space formatting, parser errors with positions, and a type and key-count summary for valid JSON.
QR & Barcode Tools
QR Code Scanner
Scan QR codes from an image file or your live camera and read their contents instantly. Decoding runs on your device - images are never uploaded.
Date & Time Tools
Date Difference Calculator
Count the exact days between any two dates, with the same span shown in weeks, months and years - updated live as you pick the dates.
QR & Barcode Tools
Barcode Generator
Create CODE128, EAN-13, UPC and CODE39 barcodes in your browser and download them as SVG - with check digits calculated and validated for you.
Text Tools
Case Converter
Convert text to UPPER, lower, Title Case, sentence case, camelCase, snake_case or kebab-case - the result updates as you type, ready to copy.
Text Tools
Remove Duplicate Lines
Remove repeated lines from text or a list while keeping the first or last occurrence. Case and blank-line options included, nothing is uploaded.
Text Tools
Text Reverser
Reverse text three ways - every character, the word order, or the line order - with the result updating as you type and a one-click copy button.
Text Tools
Lorem Ipsum Generator
Generate classic lorem ipsum as paragraphs, sentences or single words, in exact counts from 1 to 100, ready to copy or download as a .txt file.
Text Tools
Text Diff Checker
Compare two texts line by line: added lines in green, removed lines struck through in red, unchanged lines plain, with a count of each.
Developer Tools
URL Encoder / Decoder
Percent-encode text for use in URL query strings, or decode encoded strings back to readable text, with a clear error when the input is malformed.
Developer Tools
Base64 Encoder / Decoder
Encode text to Base64 and decode Base64 back to text, UTF-8 safe so accents and emoji survive, with a clear error for invalid input.
Image Tools
Image Resizer
Resize an image by exact pixels or percentage with the aspect-ratio lock on. Download the result as a PNG; your image is never uploaded.
Image Tools
Image Format Converter
Convert one image at a time between PNG, JPG and WebP in your browser, with a background colour you choose wherever JPG replaces transparency.
Image Tools
Image Cropper
Crop images to exact pixel dimensions with numeric X, Y, width and height controls, and download the result as a PNG. Nothing is uploaded.
Password & Security
Password Strength Estimator
Estimate password strength locally from length, character variety and common patterns, with a rating from Weak to Excellent.
Password & Security
UUID Generator
Generate random UUID v4 values in bulk, 1 to 100 at a time, with an uppercase option and one-click copy-all. Made locally with crypto randomness.
Password & Security
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text with the Web Crypto API. Instant hex output, computed locally in your browser.
Unit Converters
Unit Converter
Convert length, mass, temperature, area, volume, speed and data units instantly, using exact defined conversion factors.
Date & Time Tools
Time Zone Converter
Convert a date and time between 12 world time zones using the Intl API and IANA zone names, with daylight-saving rules applied automatically.
Audio & Accessibility
Text to Speech
Read text aloud with the voices already on your device, with adjustable rate and pitch and pause, resume and stop controls.
Date & Time Tools
Countdown Timer
Set hours, minutes and seconds — or tap a preset — and count down with big clear digits, the time left in your tab title, and a beep at zero.
Date & Time Tools
Stopwatch
Time anything to the centisecond with lap splits you can copy in one click — timestamp-based, so it stays accurate even in a background tab.
Date & Time Tools
World Clock
See the current time in New York, London, Tokyo and nine more cities at a glance, next to your own local time — all from your device's clock.
Developer Tools
Meta Tag Generator
Build SEO, Open Graph and Twitter Card meta tags by filling in a form, then copy the ready HTML for your page head. Free, instant and private.
Developer Tools
Robots.txt Generator
Create a robots.txt file with allow and disallow rules, crawl-delay and a sitemap line, then copy or download it ready to upload. Free and instant.
Calculators
Loan EMI Calculator
Work out the monthly EMI on any loan from the amount, interest rate and term, with total interest and total repayment shown. Free and instant.
PDF Tools
Merge PDF
Combine multiple PDF files into one document, in the order you choose — free, in your browser, with nothing uploaded.
PDF Tools
Image to PDF Converter
Turn JPG, PNG and other images into one PDF — one image per page, on A4, Letter or fit-to-image pages. Free, private, in your browser.
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
Create QR codes for links, Wi-Fi, contact cards or text and download a print-ready PNG. Free, no sign-up, nothing uploaded.
Calculators
Percentage Calculator
Find what X% of a number is, work out percentage increase, decrease and change, and compare two values with percentage difference.
Productivity Tools
Random Number Generator
Pick random integers or decimals in any range, with a no-repeats option for lottery draws, raffles and giveaway winners.
Text Tools
Word Counter
Count words, characters, sentences and paragraphs as you type, with reading and speaking time estimates. Your text is never uploaded.
Calculators
BMI Calculator
Calculate Body Mass Index from height and weight in metric or imperial units, with your WHO category shown instantly as you type.
Password & Security
Password Generator
Create strong random passwords on your own device with secure randomness - up to 128 characters, one at a time or in bulk.
Featured tools
QR & Barcode Tools
QR Code Generator
Create QR codes for links, Wi-Fi, contact cards or text and download a print-ready PNG. Free, no sign-up, nothing uploaded.
Text Tools
Word Counter
Count words, characters, sentences and paragraphs as you type, with reading and speaking time estimates. Your text is never uploaded.
Password & Security
Password Generator
Create strong random passwords on your own device with secure randomness - up to 128 characters, one at a time or in bulk.
Image Tools
Image Compressor
Compress JPG, PNG and WebP images in your browser with an adjustable quality slider, before/after sizes and no uploads.
Calculators
Standard Calculator
Add, subtract, multiply and divide full expressions with correct order of operations, parentheses and keyboard support. Free, in your browser.
Developer Tools
JSON Formatter & Validator
Beautify, validate and minify JSON locally: 2-space formatting, parser errors with positions, and a type and key-count summary for valid JSON.
Recently added
Date & Time Tools
World Clock
See the current time in New York, London, Tokyo and nine more cities at a glance, next to your own local time — all from your device's clock.
Developer Tools
Meta Tag Generator
Build SEO, Open Graph and Twitter Card meta tags by filling in a form, then copy the ready HTML for your page head. Free, instant and private.
Developer Tools
Robots.txt Generator
Create a robots.txt file with allow and disallow rules, crawl-delay and a sitemap line, then copy or download it ready to upload. Free and instant.
Calculators
Loan EMI Calculator
Work out the monthly EMI on any loan from the amount, interest rate and term, with total interest and total repayment shown. Free and instant.
PDF Tools
Merge PDF
Combine multiple PDF files into one document, in the order you choose — free, in your browser, with nothing uploaded.
PDF Tools
Image to PDF Converter
Turn JPG, PNG and other images into one PDF — one image per page, on A4, Letter or fit-to-image pages. Free, private, in your browser.
Browse by category
Calculators
Percentage, standard and scientific calculators, a BMI calculator and a loan EMI calculator — everyday maths with the formulas shown, in your browser.
5 tools →
Text Tools
Word counter, case converter, duplicate line remover, text reverser, diff checker and lorem ipsum generator — clean and compare text without uploads.
6 tools →
Image Tools
Compress, resize, convert and crop images locally: shrink JPG and PNG files, hit exact pixel sizes and switch formats without uploading a single file.
4 tools →
QR & Barcode Tools
Create QR codes for links, Wi-Fi and contact cards, scan codes from images or your camera, and generate CODE128, EAN-13 and UPC barcodes — all locally.
3 tools →
Password & Security
Generate strong passwords, estimate password strength, create UUIDs and hash text with SHA — security tools that run locally and store nothing at all.
4 tools →
Date & Time Tools
Age and date-difference calculators, a time zone converter, countdown timer, stopwatch and world clock — exact date maths and live time, in your browser.
6 tools →
Unit Converters
One converter for length, mass, temperature, area, volume, speed and data units, using exact defined conversion factors — instant results as you type.
1 tool →
Developer Tools
JSON formatter and validator, Base64 and URL encoder/decoders, a meta tag generator and a robots.txt generator — developer utilities that stay on-device.
5 tools →
Productivity Tools
A random number generator with a no-repeats mode for fair lottery draws, raffles and giveaway picks — cryptographic randomness, generated on your device.
1 tool →
Audio & Accessibility
Text to speech that reads your words aloud with your own device voices, at your pace and pitch — your text is never sent to a speech service, ever.
1 tool →
PDF Tools
Merge several PDFs into one file, or turn JPG and PNG images into a PDF document — your files are read and rebuilt in your browser, never uploaded.
2 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.