Free. Fast. No signup. No tracking. All tools run locally in your browser โ your data never leaves your device.
Calculate monthly payments, total interest, amortization.
Convert between 30+ world currencies instantly.
Monthly payments for any loan. Amortization schedule.
What is X% of Y? Percentage change, difference.
Gross to net salary. Tax breakdown by country.
Calculate tip and split the bill. Quick and easy.
Calculate Body Mass Index. Metric and imperial.
Daily calorie needs. BMR, TDEE. Lose, maintain, gain.
Pregnancy due date, trimester, gestational age.
Protein, carbs, fat. Balanced, keto, high protein.
4 formulas. Healthy BMI range for your height.
US Navy method. Fat mass, lean mass, category.
Exact age in years, months, days. Zodiac sign. Birthday countdown.
Days, weeks, months between two dates. Business days included.
Millisecond precision stopwatch with lap times. No app needed.
Live countdown to any date. Days, hours, minutes, seconds ticking.
Days until Christmas, New Year, Halloween & any custom date.
Live time in 12+ world cities. Add cities. Day/night indicator.
Convert length, weight, temperature, volume, area, speed, data & time.
Cryptographically secure passwords. Strength meter. Never stored.
Convert time between 24 zones. Live world clock. Meeting planner.
Sale price, stack discounts, buy X get Y. Black Friday ready.
Margin vs markup. Calculate selling price and profit.
Create professional invoices. Line items, tax, discounts. Download PDF. Free.
Return on investment. Net profit. Annualized ROI.
Generate company names by keyword. Domain availability.
Cost to selling price. Markup vs margin table.
Convert text to 20+ Unicode font styles for Instagram, TikTok & more
Count words, characters, sentences, paragraphs. Reading time & keyword density.
Generate placeholder text. Paragraphs, sentences, or exact word count.
UPPER, lower, Title, camelCase, snake_case, kebab-case & 6 more.
Browse and copy all emojis. Search by name. 9 categories. One-click copy.
Write Markdown, see live HTML preview. Copy HTML. Split-pane editor.
Format, validate, minify JSON. Syntax highlighting. Error detection.
Generate MD5, SHA-1, SHA-256, SHA-512 hashes. Web Crypto API powered.
Encode text to Base64 or decode Base64 back. Image to data URI.
Compare two texts side by side. Additions in green, deletions in red.
Write regex, test against text, see matches highlighted in real time.
Create QR codes for URLs, WiFi, email, phone. Color themes. Free PNG download.
Reduce image size by up to 80%. JPEG, PNG, WebP. Nothing leaves your browser.
Create beautiful CSS gradients visually. Pick colors, angle, copy CSS.
Pick colors. Get HEX, RGB, HSL. Generate shades, tints, complementary.
Generate favicons from a letter or emoji. All sizes. Download PNG pack.
Frame screenshots in browser or device mockups. Gradient backgrounds.
Full scientific calculator โ sin, cos, tan, log, powers, memory. Keyboard supported.
Square root, cube root, nth root, and perfect square checker.
Add, subtract, multiply, divide fractions. Mixed numbers & simplification.
Calculate GPA from grades and credit hours. 4.0 scale & letter grades.
Generate random integers, floats, or lists. Custom range & seed.
Convert numbers to Roman numerals and back. Supports 1โ3999.
Running cost of any appliance per day, month & year. 12 presets.
Solve V, I, R, P from any two values. All 6 combinations.
Panels needed, system cost, annual savings & payback period.
Decode/encode 4 and 5 band resistors. Visual preview.
Liters needed for any room. Coats, doors & windows included.
AWG gauge by current, distance & voltage drop. Cu/Al.
Tools4Free is a growing collection of over 40 free browser-based utilities built for developers, designers, writers, marketers, students, and anyone who needs quick, reliable tools without the hassle of signing up or installing software. Every single tool on this site runs 100% locally in your browser using modern Web APIs. Your data never leaves your device โ nothing is uploaded, stored, or tracked. There are no accounts to create, no cookies to accept, and no premium tiers to unlock. Everything is completely free, forever.
Whether you need to generate a QR code for a business card, format a messy JSON payload before a code review, calculate your monthly mortgage payment, or figure out your daily calorie intake, Tools4Free has you covered. The interface is clean, fast, and distraction-free โ no pop-ups, no ads, no dark patterns. Just open the tool, do what you need, and move on with your day.
Create eye-catching social media posts with the Fancy Text Generator, which converts plain text into over 20 Unicode font styles compatible with Instagram, TikTok, Twitter, and more. Count words, characters, and sentences with the Word Counter, or switch between UPPER, lower, Title Case, camelCase, and snake_case using the Text Case Converter. Need placeholder text? The Lorem Ipsum Generator creates paragraphs, sentences, or exact word counts instantly. Write and preview markup in the Markdown Editor, or spot differences between two texts with the Diff Checker.
Developers rely on Tools4Free for everyday coding tasks. The JSON Formatter validates, beautifies, and minifies JSON with syntax highlighting and error detection. Generate MD5, SHA-1, SHA-256, and SHA-512 hashes with the Hash Generator, encode and decode strings with the Base64 tool, or write and test regular expressions with live match highlighting using the Regex Tester. For design work, pick exact colors and get HEX, RGB, and HSL values with the Color Picker, or create beautiful CSS backgrounds with the Gradient Generator.
Reduce file sizes by up to 80% with the Image Compressor, which handles JPEG, PNG, and WebP formats entirely in your browser. Create custom QR codes with color themes using the QR Code Generator, generate favicons from letters or emojis with the Favicon Generator, or frame your screenshots in sleek browser and device mockups using the Screenshot Mockup tool.
Plan your finances with precision. The Mortgage Calculator breaks down monthly payments, total interest, and full amortization schedules. Compare loan options with the Loan Calculator, project compound growth with the Investment Calculator, or convert gross to net pay with the Salary Calculator. Quickly solve any percentage calculation, convert between 30+ currencies with the Currency Converter, split bills with the Tip Calculator, or plan long-term with the Retirement Calculator.
Take control of your health goals with science-backed calculators. Estimate your daily energy needs with the Calorie Calculator using the Mifflin-St Jeor equation, check your BMI, or dial in your protein, carbs, and fat targets with the Macro Calculator. Measure body composition with the Body Fat Calculator, find your healthy range with the Ideal Weight Calculator, or plan sustainable weight loss with the Calorie Deficit Calculator. Runners can plan race splits with the Pace Calculator, lifters can estimate max strength with the 1RM Calculator, and expecting parents can track milestones with the Due Date Calculator.
Yes, all 40+ tools on Tools4Free are completely free to use. There is no premium version, no signup wall, no usage limit, and no hidden fees. Every feature you see is available to everyone, immediately, without restrictions.
Absolutely. Every tool runs entirely in your browser using client-side JavaScript and Web APIs. Your text, images, calculations, and personal information never leave your device. Nothing is sent to a server, nothing is stored in a database, and nothing is shared with third parties. Your data stays on your machine.
Tools4Free offers over 40 tools across five main categories: text and content tools such as fancy text generators, word counters, and case converters; developer tools like JSON formatters, hash generators, and regex testers; image and design tools including an image compressor and QR code generator; finance calculators for mortgages, loans, investments, and salaries; and health calculators covering calories, BMI, macros, body fat, and running pace.
No. Every tool on Tools4Free works instantly without any account, login, or registration. There are no cookies to accept and no email addresses to provide. Just open the page and start using the tool right away.
Yes. All tools are fully responsive and work on any device with a modern web browser, including smartphones, tablets, laptops, and desktops. The interface adapts to your screen size so you get the same experience on mobile as you do on a computer.