Every tool you need, in one place
Counters, calculators, converters, generators and everyday utilities — fast, free and privacy-first. Every tool runs entirely in your browser, so your data never leaves your device.
Popular tools
The utilities people reach for most often.
Word Counter
Count words, characters, sentences and reading time as you type.
JSON Formatter
Beautify, validate and minify JSON with precise error locations.
Age Calculator
Work out exact age in years, months and days — plus birthday countdown.
Percentage Calculator
Three percentage problems solved: of, is-what-percent, and change.
Loan EMI Calculator
Monthly EMI, total interest and payment breakdown for any loan.
BMI Calculator
Body mass index with WHO category and healthy weight range.
Image Compressor
Shrink JPG, PNG and WebP files with a quality slider — locally.
QR Code Generator
Create QR codes for URLs, text, Wi-Fi and contacts — download PNG.
Browse by category
All 99 tools organised into 10 categories.
Text & Writing
Count, clean, transform and analyse any piece of text.
Developer Tools
Everyday utilities for developers: format and validate JSON, encode and decode Base64 or URLs, generate hashes and UUIDs, test regular expressions, decode JWTs and explain cron expressions.
Time & Date
Calculate ages, differences between dates, working days and time zones, or convert Unix timestamps in a click.
Math Calculators
From percentages and averages to primes, factorials and quadratic equations, these calculators solve everyday maths with clear step-by-step results.
Finance & Money
Plan loans and EMIs, project compound interest, split GST, discounts and tips, or convert currencies.
Health & Fitness
Estimate BMI, daily calorie needs, body fat percentage, ideal weight and hydration targets.
Image & Design
Compress, resize and convert images, build favicons, generate QR codes and barcodes, and explore colour palettes.
Unit Converters
Convert length, weight, temperature, area, volume, speed, data storage, energy, pressure and more between metric and imperial units.
Random & Security
Generate strong passwords, random numbers, lottery picks, dice rolls and coin flips — plus check password strength and validate card numbers with the Luhn algorithm.
Everyday Utilities
The little helpers you reach for daily: test your typing speed, translate Morse code and binary, convert Roman numerals, cipher text with ROT13, and build meta tags and UTM links for your website.
Why people choose 99TopTool
Built for speed, privacy and zero friction.
Privacy-first by design
Every tool runs locally in your browser. Your text, files and numbers are never uploaded to any server.
Instant, always
Static pages, no queues, no rate limits. Results update as you type — even on slow connections.
Free, forever
No accounts, no subscriptions, no watermarks and no “pro” upsells. Every feature, for everyone.
Any device, anywhere
Phone, tablet or desktop — the tools adapt to your screen and keep working offline once loaded.
The complete A–Z of all 99 tools
Every tool, grouped by category — jump straight to what you need.