Free AI Tools & Online Utilities
145+ free tools including an AI Content Studio. Write, generate, format, and convert — all in your browser.
AI Content Studio
Our most popular tool — type any request and let AI generate product descriptions, blog posts, SEO meta tags, emails, and more. No signup required.
AI Content Studio
Your all-in-one AI writing assistant. Type any request and let AI generate it instantly.
Featured AIAI Product Description Writer
Generate compelling, conversion-optimized product descriptions with AI.
Featured AIAI SEO Meta Generator
Generate optimized meta titles and descriptions for better search rankings.
Featured AIAI Blog Post Writer
Write complete, well-structured blog posts on any topic with AI.
Featured AIAI Email Subject Lines
Generate 10 high-open-rate email subject lines with AI.
Featured AIAI Content Rewriter
Rewrite and paraphrase text with AI. Change tone and variation level.
NetworkPort Lookup
Search TCP/UDP port numbers, protocols, services, and security risks.
Popular ImageImage Compressor
Compress and resize images directly in your browser.
Popular ImageQR Code Generator
Generate QR codes from URLs and text. Customizable size and format.
TextWord Counter
Count words, characters, sentences, and paragraphs in your text.
Popular SecurityPassword Generator
Create strong, random passwords with adjustable length and complexity.
Popular DeveloperJSON Formatter
Format, validate, and beautify JSON data instantly.
DeveloperColor Picker
Pick colors, convert between HEX, RGB, HSL formats.
DeveloperBase64 Encoder/Decoder
Encode or decode text with Base64 encoding.
TextLorem Ipsum Generator
Generate placeholder Lorem Ipsum text by paragraphs.
DeveloperURL Encoder / Decoder
Encode and decode URLs with encodeURI and encodeURIComponent support.
SecurityHash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
DeveloperUUID Generator
Generate random UUID v4 identifiers. Batch generation up to 100.
DeveloperImage to Base64
Convert images to Base64 Data URIs for inline embedding.
TextText Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, and more.
DeveloperTimestamp Converter
Convert Unix timestamps to human-readable dates and back. Supports seconds, milliseconds, UTC and local time.
DeveloperRegex Tester
Test regular expressions in real time with match highlighting and capture group inspection.
DeveloperBase Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly.
TextLine Tools
Sort, deduplicate, shuffle, trim and transform lines of text. Remove blank lines and change case.
SecurityPassword Strength Checker
Estimate password entropy, crack time and get an actionable improvement checklist.
Popular CalculatorBMI Calculator
Calculate Body Mass Index from height & weight, metric or imperial.
Popular CalculatorAge Calculator
Find your exact age in years, months, days and total days lived.
Popular CalculatorPercentage Calculator
Find X% of a number, percent of a total, and percentage change.
Popular CalculatorLoan Calculator
Estimate monthly payment, total interest and repayment for any loan.
Popular CalculatorMortgage Calculator
Monthly mortgage payment from price, down payment, rate and term.
CalculatorTip Calculator
Calculate the tip and split any bill between people.
CalculatorDiscount Calculator
Find the sale price and savings for any percentage discount.
CalculatorCompound Interest Calculator
Project savings growth with compound interest and contributions.
CalculatorGPA Calculator
Compute a weighted GPA on a 4.0 scale from your courses.
Popular CalculatorCalorie Calculator
Estimate daily calorie needs (TDEE) and BMR for your body.
CalculatorSales Tax Calculator
Add or remove sales tax / VAT from any price instantly.
CalculatorSalary Calculator
Convert pay between hourly, weekly, monthly and yearly.
CalculatorFuel Cost Calculator
Estimate the fuel cost of a trip from distance and efficiency.
CalculatorROI Calculator
Calculate ROI, net profit and annualized return on any investment.
CalculatorDate Difference Calculator
Count days, weeks and months between any two dates.
Popular ConverterUnit Converter
Convert length, weight and temperature units in one tool.
ConverterTemperature Converter
Convert Celsius, Fahrenheit and Kelvin instantly.
ConverterLength Converter
Convert mm, cm, m, km, inch, foot, yard and mile.
ConverterWeight Converter
Convert mg, g, kg, tonne, ounce, pound and stone.
ConverterSpeed Converter
Convert m/s, km/h, mph, ft/s and knots.
ConverterArea Converter
Convert m², ft², acres, hectares, km² and mi².
ConverterVolume Converter
Convert ml, liters, cups, pints, quarts and gallons.
ConverterData Storage Converter
Convert bits, bytes, KB, MB, GB, TB and binary units.
ConverterTime Unit Converter
Convert seconds, minutes, hours, days, weeks and years.
ConverterRoman Numeral Converter
Convert numbers to Roman numerals and back.
ConverterNumber to Words Converter
Spell out any number in English words for cheques & contracts.
ConverterText to Binary Converter
Convert text to binary and binary back to text.
TextReverse Text
Reverse text by characters, words or lines instantly.
TextText Repeater
Repeat text or a word any number of times with a separator.
TextFind and Replace Text
Find and replace text with case-insensitive and regex options.
TextURL Slug Generator
Convert titles into clean, SEO-friendly URL slugs.
TextRemove Line Breaks
Strip line breaks and join text into clean paragraphs.
TextWhitespace Remover
Trim, collapse spaces, remove blank lines and clean text.
New! TextText to Speech
Read any text aloud with adjustable voice, speed and pitch.
Popular TextFancy Text Generator
Create fancy Unicode fonts for bios, posts and usernames.
DeveloperHTML Encoder / Decoder
Encode & decode HTML entities to safely display markup.
DeveloperCSS Minifier
Minify CSS by removing comments and whitespace.
DeveloperJSON Minifier
Minify and validate JSON to shrink payload size.
DeveloperHTML Minifier
Minify HTML by removing comments and extra whitespace.
Popular DeveloperMarkdown to HTML
Convert Markdown to HTML with a live preview.
DeveloperCSV to JSON
Convert CSV to a JSON array of objects instantly.
DeveloperJSON to CSV
Convert a JSON array of objects into clean CSV.
DeveloperJWT Decoder
Decode JWT header and payload to inspect claims.
DeveloperCron Expression Generator
Build cron expressions and get a plain-English schedule.
DeveloperHTTP Status Codes
Search HTTP status codes with clear explanations.
FunRandom Number Generator
Generate random numbers in any range, single or many.
ConverterMorse Code Translator
Convert text to Morse code and decode Morse back.
FunOnline Countdown Timer
Set a countdown timer with presets or custom time.
FunOnline Stopwatch
Count-up stopwatch with laps, start/stop/reset.
FunDice Roller
Roll any number of dice with any sides online.
Popular TextWord Frequency Counter
Count word frequency, keyword density and most-used terms in any text.
TextText Diff Checker
Compare two texts and highlight added, removed and changed lines.
TextDuplicate Line Remover
Delete duplicate lines and blank lines from any text list.
TextText Line Sorter
Sort text lines A–Z, by length, numerically, reverse or random.
TextSimplified-Traditional Chinese Converter
Convert Simplified and Traditional Chinese text both ways.
DeveloperColor Converter
Convert HEX, RGB and HSL colors with live preview.
DeveloperURL Parser
Split a URL into protocol, host, path, query params and more.
DeveloperSQL Formatter
Beautify and indent SQL queries with uppercased keywords.
DeveloperXML Formatter
Indent and validate XML with pretty printing.
DeveloperYAML to JSON Converter
Convert basic YAML (maps, lists, scalars) to JSON.
DeveloperCSS Formatter
Indent and beautify CSS, or minify it for production.
DeveloperJSON Validator
Validate JSON syntax, locate errors, and pretty-print.
CalculatorBreak-Even Calculator
Calculate break-even units and revenue from costs.
CalculatorVAT Calculator
Add or reverse VAT/sales tax at any rate.
CalculatorWeighted Grade Calculator
Compute weighted final grade from items and weights.
CalculatorBody Fat Calculator
Estimate body fat % from measurements (Navy method).
CalculatorDaily Water Intake Calculator
Estimate daily water intake from weight and lifestyle.
FunCoin Flip
Flip a coin online with heads/tails tracking.
FunRandom Name Picker
Pick one or more random names from a list.
FunRandom Team Generator
Randomly divide a list into N balanced teams.
CalculatorBMR Calculator
Find your basal metabolic rate and daily calorie needs.
CalculatorIdeal Weight Calculator
See your healthy weight range using four medical formulas.
CalculatorPregnancy Due Date Calculator
Estimate due date, gestational age and trimester dates.
CalculatorCar Loan Calculator
Work out auto loan payments, interest and total cost.
CalculatorSavings Goal Calculator
Plan monthly savings to reach any financial goal.
CalculatorInflation Calculator
Calculate how inflation changes money’s real value.
CalculatorElectricity Cost Calculator
Find out what your appliances cost to run.
CalculatorPaint Calculator
Estimate litres of paint needed for any room.
CalculatorTile Calculator
Calculate tiles and boxes needed for any area.
CalculatorMacro Calculator
Split daily calories into protein, carbs and fat.
CalculatorRunning Pace Calculator
Work out running pace, finish time or distance.
CalculatorSleep Calculator
Find bedtimes that match 90-minute sleep cycles.
CalculatorUnit Price Calculator
Compare package prices and find the real best value.
CalculatorIncome Tax Calculator
Estimate income tax across progressive brackets.
ConverterPressure Converter
Convert pascal, bar, psi, atm and other pressure units.
ConverterEnergy Converter
Convert joules, calories, kWh, BTU and more.
ConverterPower Converter
Convert watts, horsepower, BTU/h and other power units.
ConverterAngle Converter
Convert degrees, radians, gradians and turns.
ConverterFrequency Converter
Convert Hz, kHz, MHz, GHz and RPM.
ConverterForce Converter
Convert newtons, pound-force and kilogram-force.
ConverterDensity Converter
Convert kg/m³, g/cm³, lb/ft³ and other density units.
ConverterShoe Size Converter
Convert shoe sizes between US, UK, EU and CN.
ConverterCooking Measurement Converter
Convert cups, spoons, grams and ml for recipes.
CalculatorHeart Rate Zone Calculator
Find your five heart-rate training zones for effective cardio workouts.
CalculatorDebt Payoff Calculator
Find the payoff time and total interest for any loan or credit balance.
CalculatorRetirement Calculator
Project your future retirement savings with compound growth.
CalculatorCar Lease Payment Calculator
Estimate your monthly car lease payment before you visit the dealer.
ConverterData Transfer Rate Converter
Convert bandwidth and download speeds across bit and byte units.
ConverterTorque Converter
Convert torque between N·m, lbf·ft, kgf·m and N·cm.
ConverterFuel Economy Converter
Convert fuel economy between MPG, km/L and L/100km.
DeveloperJSON to YAML Converter
Turn JSON into clean, indented YAML for config files.
DeveloperHTML to Markdown Converter
Convert HTML markup into Markdown for docs and READMEs.
DeveloperColor Contrast Checker
Test color contrast for WCAG AA / AAA accessibility.
DeveloperUser Agent Parser
Decode browser, OS, device and engine from a UA string.
DeveloperJWT Encoder
Create HS256 JWT tokens with HMAC-SHA256 signing in your browser.
DeveloperXML to JSON Converter
Turn XML into JSON, keeping attributes and structure.
DeveloperImage Resizer
Resize images to a target size, right in your browser.
DeveloperColor Palette Generator
Create tints, shades and harmonies from one base color.
DeveloperImage Rotate & Flip
Rotate and flip images with the Canvas API, locally.
DeveloperImage Cropper
Crop images to a preset aspect ratio in your browser.
DeveloperCSV to Markdown Table
Turn CSV data into a Markdown table for docs.
DeveloperBase64 to Image
Preview and download an image from a base64 string.
FunRandom Username Generator
Create random username ideas from words and numbers.
FunRandom Color Generator
Generate random hex colors to spark design ideas.
FunYes or No Decider
Flip a coin-style Yes / No / Maybe decision maker.
FunRock Paper Scissors
Play Rock Paper Scissors vs the computer with a scoreboard.
FunRandom Date Generator
Get a random date between any two dates.
FunRandom Emoji Generator
Get a random emoji to spice up your text.
TextCharacter Counter
Live-count characters, words, lines and paragraphs.
TextROT13 / Caesar Cipher
Shift letters with a Caesar cipher (ROT13 by default).
FreeToolsetDiscover 145+ Free Tools
Browse calculators, converters, text tools, dev tools and more.
Why Choose FreeToolset?
🔒 Privacy First
All tools run locally in your browser, and your data is never uploaded to any server. You can use them with confidence even when handling sensitive code, financial data, or personal text.
⚡ Instant Use
No sign-up, download, or installation needed. Open the page and use 145+ free online tools right away, on both desktop and mobile browsers.
🛠️ Comprehensive Coverage
From developer tools like JSON formatting and regex testing, to calculators like BMI and mortgage, to text tools like word-frequency counting and text comparison — all your daily needs in one place.
📱 Responsive Design
All tools adapt to any screen size. Whether you're doing deep work at a computer or quickly looking something up on your phone, the experience stays smooth.
Frequently Asked Questions
Basics
- Are FreeToolset's tools really completely free?
- Yes — all 145+ tools are free to use with no account, no hidden charges, and no ads.
- Do I need to install anything or sign up?
- No. Everything runs in your browser — just open a tool and use it, no installation or account needed.
- Do the tools work with Chinese text?
- Yes. While the interface is in English, several tools (such as the word-frequency counter and the Chinese converter) also handle Chinese text.
Privacy & Safety
- Is my data safe?
- Absolutely. All processing happens in your browser and is never uploaded to our servers. You can even keep using most tools offline.
- Do you store my inputs?
- No. Your text, numbers, and files stay on your device — we do not keep copies of what you process.
Using the Tools
- Can I use FreeToolset on my phone?
- Yes. All tools are responsive and work smoothly in mobile browsers.
- What is the AI Content Studio?
- A free AI writing assistant that generates product descriptions, blog posts, SEO tags, and email subjects — 5 free credits every day, no sign-up.
- How accurate are the calculators and converters?
- They compute locally using standard formulas. For major decisions (mortgage, tax, health), confirm the numbers with a professional — our tools are for planning, not advice.
Support
- How do I get help or send feedback?
- Visit our contact page — we read every message and ship improvements regularly.
- Can I request a new tool?
- Yes! Tell us on the contact page what you need, and we'll consider it for a future update.
📚 Tutorials & Guides
View all 45 tutorials →Regular Expressions for Beginners: Patterns, Groups & Online Testing in 30 Minutes
A complete guide to regex for beginners — matching, groups, and online testing. FreeToolset provides free tools and tutorials to help you master it quickly, no sign-up required.
How to Calculate BMI Accurately: Ranges, Myths & Examples
A complete guide to calculating BMI accurately — ranges, myths, and examples. FreeToolset offers free tools and tutorials, no sign-up required.
What Is Base64? Encoding Principles and Common Uses Explained
A complete guide to what Base64 is — encoding principles and common uses. FreeToolset provides free tools and tutorials, no sign-up required.
Loan & Mortgage Math: Monthly Payments and Interest Explained
A complete guide to loans vs mortgages — monthly payments and interest explained. FreeToolset provides free tools and tutorials, no sign-up required.
How to Generate a Strong Password: From Length to Entropy
A complete guide to creating strong passwords — from length to entropy. FreeToolset provides free tools and tutorials, no sign-up required.
SEO Meta Tag Optimization: How to Write Titles & Descriptions People Click
A complete guide to SEO meta tag optimization — how to write titles and descriptions people click. FreeToolset provides free tools and tutorials, no sign-up required.