Free Online Tools
57 fast, private tools that run entirely in your browser. No signup, no data collection, no nonsense.
Calculators 15 tools
View all →Percentage Calculator
Calculate percentages, increases, decreases, and more.
BMI Calculator
Check your Body Mass Index with metric or imperial units.
Age Calculator
Calculate exact age in years, months, and days.
Loan Calculator
Calculate monthly payments, interest, and amortization.
Tip Calculator
Calculate tips and split the bill between people.
Discount Calculator
Calculate sale price and savings from any discount.
GPA Calculator
Calculate your grade point average on a 4.0 scale.
Calorie Calculator
Calculate daily caloric needs based on your profile.
Compound Interest
See how your investments grow with compound interest.
Salary Calculator
Convert between hourly, daily, weekly, and annual salary.
Electricity Cost Calculator
Calculate how much it costs to run any appliance.
Date Duration Calculator
Find days between dates, add/subtract days, business days.
Concrete Calculator
Calculate concrete, gravel, paint, and flooring needed.
Take-Home Pay Calculator
Estimate net pay after federal taxes and deductions.
Bill Splitter
Split bills equally or by income, room size, or custom shares.
Unit Converters 10 tools
View all →Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
Length Converter
Convert meters, feet, inches, miles, and more.
Weight Converter
Convert kg, pounds, ounces, stone, and tonnes.
Speed Converter
Convert mph, km/h, knots, and m/s.
Volume Converter
Convert liters, gallons, cups, tablespoons, and more.
Area Converter
Convert square meters, feet, acres, and hectares.
Data Storage Converter
Convert bytes, KB, MB, GB, TB, and PB.
Time Converter
Convert seconds, minutes, hours, days, and weeks.
Pressure Converter
Convert PSI, bar, ATM, pascal, and mmHg.
Energy Converter
Convert joules, calories, kWh, and BTU.
Text Tools 10 tools
View all →Word Counter
Count words, characters, sentences, and reading time.
Character Counter
Count characters with and without spaces.
Case Converter
Convert text to uppercase, lowercase, title case, and more.
Lorem Ipsum Generator
Generate placeholder text for designs and mockups.
Slug Generator
Convert text to SEO-friendly URL slugs.
Remove Duplicate Lines
Remove repeated lines and keep unique content.
Text Diff Checker
Compare two texts and highlight the differences.
Find and Replace
Bulk find and replace text with regex support.
Text to Binary
Convert text to binary code and binary to text.
Reverse Text
Reverse characters, words, or create mirror text.
Developer Tools 12 tools
View all →JSON Formatter
Format, validate, and beautify JSON data.
HTML Encoder/Decoder
Encode and decode HTML entities.
URL Encoder/Decoder
Encode and decode URL strings.
Base64 Encoder/Decoder
Encode text to Base64 and decode it back.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes.
Regex Tester
Test regular expressions with live highlighting.
Color Picker
Pick colors and convert between HEX, RGB, and HSL.
CSS Minifier
Minify and compress CSS to reduce file size.
JavaScript Minifier
Minify JS code by removing whitespace and comments.
Markdown Preview
Write and preview Markdown with live rendering.
Aspect Ratio Calculator
Calculate and resize dimensions proportionally.
CSV Viewer
View CSV as tables and convert to JSON or TSV.
Generators 10 tools
View all →Password Generator
Generate strong, random, secure passwords.
Random Number Generator
Generate random numbers in any range.
UUID Generator
Generate unique v4 UUIDs instantly.
QR Code Generator
Generate QR codes for URLs, text, WiFi, and more.
Random Color Generator
Generate random colors with HEX, RGB, and HSL.
Fake Name Generator
Generate random names and identities for testing.
Credit Card Validator
Validate card numbers with the Luhn algorithm.
Barcode Generator
Generate barcodes in Code128, EAN-13, and more.
Htpasswd Generator
Generate encrypted passwords for .htpasswd files.
Unix Timestamp Converter
Convert between Unix timestamps and dates.
Why Use Toolsium?
Trusted by thousands of users worldwide. Here's what sets us apart.
100% Free
No hidden fees, no premium tiers, no signup walls. Every tool, always free.
Private & Secure
All tools run in your browser. Your data never touches a server.
No Signup Required
Jump straight in. No accounts, no email, no registration walls.
Lightning Fast
Lightweight pages that load in under a second on any device.
Mobile Friendly
Every tool works perfectly on phones, tablets, and desktops.
Always Available
Client-side tools work offline too. Bookmark your favourites.
Your All-in-One Toolkit for Everyday Tasks
Toolsium brings together 50 free online tools across five categories — calculators for math and finance, converters for units and measurements, text tools for writing and editing, developer tools for coding workflows, and generators for creating passwords, codes, and random data. Every tool is designed to give you an answer in seconds, with no signups, no downloads, and no ads blocking your result.
How Our Tools Work
Every tool on this site runs entirely in your browser using JavaScript. When you calculate a percentage or format a block of JSON, the processing happens on your device — nothing is sent to a server. This means results appear instantly with zero loading time, and your data remains completely private. There are no accounts, no cookies tracking your inputs, and no server logs of what you typed.
Built for Everyone
Whether you are a student checking your GPA or estimating daily calories, a developer testing a regex pattern or encoding data in Base64, or a professional comparing loan payments and projecting investment growth — these tools are built to be simple, fast, and accurate. No expertise required. Enter your data, get your result.
Common Tasks We Help With
People visit Toolsium every day to calculate a percentage of a number, convert Celsius to Fahrenheit, convert centimeters to inches, format and validate JSON, generate a strong password, count words in an essay, calculate a restaurant tip, create a QR code, convert kilograms to pounds, and check their BMI. If there is a quick calculation or conversion you need done, chances are we have a tool for it.
Always Free, Always Private
Toolsium is free to use with no limits. There are no premium tiers, no feature gates, and no "sign up to unlock" prompts. Every tool works the same way — open the page, use the tool, get your answer. Your data never leaves your browser, and we do not sell or share any information. Bookmark the tools you use most and they are always one click away.