Browse Free Online Tools by Category
SmartTools Hub groups everyday utilities into simple categories so you can reach the right tool in one or two clicks. Start with a calculator for finance or health, use an image tool before uploading files, or build better AI prompts for writing, coding, and research.
?? Calculators
Accurate calculations for health, finance, time, and more.
Age Calculator
Calculate exact age in years, months, days from date of birth.
Use tool ?BMI Calculator
Calculate Body Mass Index and check your ideal weight range.
Use tool ?Discount Calculator
Find the final price after applying any percentage discount.
Use tool ?Loan Calculator
Calculate monthly payments, total interest, and loan cost.
Use tool ?EMI Calculator
Compute Equated Monthly Installments for any loan amount.
Use tool ?Profit Margin
Calculate gross, net, and operating profit margins instantly.
Use tool ?Sales Tax Calculator
Add or remove sales tax from any price in seconds.
Use tool ?Time Duration
Calculate time difference between two moments in hours & minutes.
Use tool ?Date Difference
Find the exact number of days, weeks, or months between two dates.
Use tool ?Snow Day Calculator
Predict the chances of school or work cancellation based on snowfall, temperature, wind, and road conditions.
Use tool ??? Converters
Convert units, currencies, and measurements effortlessly.
Unit Converter
Convert between length, weight, volume, temperature, and more.
Use tool ?Length Converter
Convert meters, feet, miles, km, inches, and other length units.
Use tool ?Weight Converter
Convert between kg, pounds, grams, ounces, and tons.
Use tool ?Temperature Converter
Instantly convert Celsius, Fahrenheit, and Kelvin values.
Use tool ?Currency Converter
Convert between major world currencies with live rate references.
Use tool ?? Generators
Generate useful content and codes instantly.
Random Number Generator
Generate random numbers within any range with one click.
Use tool ?Username Generator
Create unique, creative usernames for any platform instantly.
Use tool ?QR Code Generator
Generate QR codes for URLs, text, emails, and more.
Use tool ??? Text Tools
Analyze, format, and transform your text content.
Case Converter
Convert text to UPPER, lower, Title, camelCase, and more.
Use tool ?Character Counter
Count characters, words, and check against platform limits.
Use tool ?Sentence Counter
Count sentences, words, and paragraphs in any text.
Use tool ?Paragraph Counter
Count paragraphs and analyze text structure at a glance.
Use tool ??? Developer Tools
Tools built for developers, designers, and tech enthusiasts.
IP Lookup
Find geographic location and details for any IP address.
Use tool ?JSON Formatter
Beautify, validate, and minify JSON data with syntax highlighting.
Use tool ?HTML Minifier
Minify HTML to reduce file size and improve page speed.
Use tool ?CSS Minifier
Remove whitespace and comments from CSS to shrink file size.
Use tool ?Keyword Density Checker
Analyze keyword frequency and density percentage in any text for SEO optimization.
Use tool ??? AI Tools
Prompt helpers and AI workflow tools that run instantly in your browser.
AI Prompt Generator
Create structured prompts for ChatGPT, Gemini, Claude, and other AI assistants.
Use tool ?AI Prompt Enhancer
Turn a rough idea into a clear, detailed prompt with role, context, and output format.
Use tool ?AI Content Ideas
Generate topic angles, post ideas, hooks, and AI-ready content briefs.
Use tool ?AI Meta Description Generator
Create SEO-friendly meta descriptions for blogs, tools, products, and landing pages.
Use tool ?AI Learning Guides
Learn how to get better results from the new AI tools.
??? Image Tools
Compress, resize, and convert images � 100% in your browser, no uploads.
Image Compressor
Compress JPG, PNG & WebP images without losing quality. See before/after preview.
Use tool ?JPG to PNG Converter
Convert images between JPG, PNG and WebP formats instantly in your browser.
Use tool ?Image Resizer
Resize images by pixels, percentage, or popular presets with aspect ratio lock.
Use tool ?Bulk Image Compressor
Compress multiple images at once and download them all as a ZIP file.
Use tool ?New Tools
Recently added utilities for writing, coding, business, and security workflows.
Word Counter
Count words, characters, sentences, and reading time.
Use tool →URL Encoder Decoder
Encode and decode URL text for links and APIs.
Use tool →Base64 Encoder Decoder
Encode or decode Base64 text instantly.
Use tool →Tip Calculator
Calculate tip, total bill, and split per person.
Use tool →Password Generator
Create strong random passwords in your browser.
Use tool →Why Choose SmartTools Hub?
We built the tools we wish existed � fast, clean, no fluff.
Lightning Fast
All tools run entirely in your browser � no server round-trips, instant results.
100% Private
Your data never leaves your device. We don't store, track, or sell anything.
Always Accurate
Every formula is verified. Results you can trust for work, school, and life.
Quick answers about ToolsHub