free tools for text, SEO, developers, DNS, finance, home, cars, health, work and foodEvery tool runs locally in your browser. No sign-up. Nothing is uploaded.

Free online tools that actually finish the job

Count words, format JSON, build UTM links, generate SPF and DMARC records, compress images and more. Every tool runs in your browser, so your text and files never leave your device.

Free tools, no cost Private: runs 100% in your browser Instant results, no waiting No sign-up or account needed

Most used tools

The tools people open every day, ready in one click.

Browse by category

Twelve categories, every tool counted. Pick a job, get the tool.

Text Tools5 tools

Counters, converters and analysers for anything you write.

SEO and Webmaster5 tools

Builders for the tags, links and files search engines read.

Developer Tools5 tools

Format, encode, test and minify code without leaving the browser.

Security and DNS5 tools

Passwords, hashes and the DNS records that protect your email.

Calculators and Generators3 tools

Everyday calculators and generators with the working shown.

Image and Media2 tools

QR codes and image compression, processed on your device.

Money and Finance23 tools

Paycheck, mortgage, loan, credit card, debt payoff, retirement, tax, budget and everyday money calculators for life in the United States.

Home and DIY11 tools

Paint, tile, flooring, concrete, mulch, fence, deck, moving, roofing, wallpaper and square footage calculators for real projects.

Health and Family17 tools

Sleep, ovulation, due date, calorie, period, body fat, heart rate, pets and everyday health calculators. No sign-up, no account.

Work and School10 tools

GPA, grades, hours, dates, timers and freelance rates for students and workers.

Car and Travel6 tools

MPG, fuel, road trip, tyre size, lease and EV charging calculators.

Food, Kitchen and Everyday8 tools

Recipes, bills, coffee, parties, budgets and electricity costs.

All tools

Search or filter by category. Results update as you type.

Word Counter

Count words, characters, sentences, paragraphs, reading time and keyword density as you type.

Text Tools

Character Counter

Live character counts with live limit bars for X, Instagram, LinkedIn, SMS and meta tags.

Text Tools

Case Converter

UPPERCASE, lowercase, Title Case, camelCase, snake_case and 8 more case styles in one click.

Text Tools

Keyword Density Checker

Check any keyword's density and see the top 1, 2 and 3 word phrases in your text.

Text Tools

Lorem Ipsum Generator

Generate placeholder text by paragraphs, sentences or words, with the classic opening.

Text Tools

UTM Builder

Build campaign URLs with source, medium, campaign, term and content, plus one-click presets.

SEO and Webmaster

Meta Tag Generator

Generate meta, Open Graph and Twitter Card tags with a live Google search preview.

SEO and Webmaster

Robots.txt Generator

Build a valid robots.txt with per-bot allow and disallow rules, crawl delay and sitemap.

SEO and Webmaster

Schema Generator

Create valid JSON-LD structured data for Organization, LocalBusiness, Article, FAQ, Product and more.

SEO and Webmaster

Slug Generator

Turn titles into clean URL slugs: accents stripped, stop words removed, your separator.

SEO and Webmaster

JSON Formatter and Validator

Format, validate and minify JSON with exact line and column errors and a collapsible tree view.

Developer Tools

Base64 Encoder and Decoder

Encode and decode Base64 both ways, with URL-safe mode, file encoding and clear error messages.

Developer Tools

UUID Generator

Generate version 4 UUIDs one at a time or in bulk, uppercase or lowercase, with or without hyphens.

Developer Tools

Regex Tester

Test regular expressions live with highlighting, capture groups, flags, presets and replace mode.

Developer Tools

CSS and JS Minifier

Minify CSS and JavaScript safely and see exactly how many bytes you saved.

Developer Tools

Password Generator

Strong random passwords with a strength meter, pronounceable mode and a session history.

Security and DNS

MD5 Hash Generator

Real MD5 hashing for text and files, with a compare box to verify a hash matches.

Security and DNS

SHA-256 Hash Generator

SHA-1, SHA-256, SHA-384 and SHA-512 hashes for text and files, computed on your device.

Security and DNS

SPF Record Generator

Build a valid SPF record with includes, ip4, ip6, a and mx mechanisms and strict or soft fail.

Security and DNS

DMARC Record Generator

Build a DMARC record with policy, alignment and report addresses, explained in plain English.

Security and DNS

Age Calculator

Exact age in years, months and days, plus total days, weeks and your next birthday countdown.

Calculators and Generators

Percentage Calculator

Percent of a number, X is what percent of Y, and percentage change, with the working shown.

Calculators and Generators

Random Number Generator

Random numbers in any range, unique or repeated, sorted your way, with sum and average.

Calculators and Generators

QR Code Generator

Real scannable QR codes for URLs, text, WiFi, email, phone, SMS and vCard, in your colours.

Image and Media

Image Compressor

Compress and resize JPG, PNG and WebP images in your browser. Nothing is ever uploaded.

Image and Media

Compound Interest Calculator

See how savings grow with compound interest, monthly contributions, yearly tables and an inflation-adjusted view.

Money and Finance

Paycheck Calculator

Tax Year 2026 take-home pay for the United States: federal tax, Social Security, Medicare and all 50 states.

Money and Finance

Paint Calculator

How many gallons of paint for a room: doors and windows subtracted, coats, primer, ceiling and trim included.

Home and DIY

Tile Calculator

Tiles, boxes, grout and thinset for any floor or wall, with waste included and the cost totalled.

Home and DIY

Flooring Calculator

Flooring by the box for hardwood, laminate and vinyl plank, with layout waste and underlayment.

Home and DIY

Concrete Calculator

Cubic yards and bag counts for slabs, footings, columns and post holes, with waste and ready-mix cost.

Home and DIY

Mulch Calculator

Cubic yards, cubic feet and bag counts for mulch, topsoil and gravel beds of any size.

Home and DIY

Fence Calculator

Panels, posts, pickets, rails and concrete for a wood, vinyl or chain-link fence, with gates and cost.

Home and DIY

Deck Calculator

Decking boards, joists, posts, footings and fasteners for a new deck, with material cost compared.

Home and DIY

Sleep Calculator

Best bedtimes and wake times from 90 minute sleep cycles, plus a nap calculator and sleep debt tracker.

Health and Family

Ovulation Calculator

Ovulation day and fertile window from your last period, with a 3 month calendar and next period date.

Health and Family

Due Date Calculator

Pregnancy due date from last period, conception, ultrasound or IVF date, with week, trimester and milestones.

Health and Family

GPA Calculator

Semester and cumulative GPA with weighted grades, three scales, and a planner for the GPA you want next term.

Work and School

Mortgage Calculator

Monthly mortgage payment with taxes, insurance, PMI and HOA, extra payments, and 15, 20 and 30 year comparison.

Money and Finance

Loan Calculator

Monthly payment, total interest and total cost for any personal loan, with extra payments and solve-for modes.

Money and Finance

Tip Calculator

Tip, total and split per person for any bill, with pre-tax tipping, split by item, and a US tipping guide.

Money and Finance

Credit Card Payoff Calculator

Debt-free date and total interest for any card balance, the minimum-payment trap, and a balance transfer check.

Money and Finance

Debt Payoff Calculator

Snowball vs avalanche for up to 10 debts, with payoff order, a month-by-month schedule and CSV export.

Money and Finance

Retirement Calculator

401(k) balance at retirement, 4% rule income, employer match, and whether the money lasts to age 90.

Money and Finance

Calorie Calculator

BMR and TDEE from Mifflin-St Jeor, with calorie targets, macros, and a goal-weight planner.

Health and Family

Car Loan Calculator

Monthly car payment, total interest and total cost, with trade-in, tax, fees, term comparison and a payment-to-price reverse mode.

Money and Finance

Roth IRA Calculator

2026 Roth IRA limits and phase-outs, tax-free growth to retirement, and Roth vs traditional vs taxable comparison.

Money and Finance

Savings Goal Calculator

How much to save each month to reach a goal by your date, or when you will get there at your current saving rate.

Money and Finance

Hourly to Salary Calculator

Hourly wage to annual salary and back, with unpaid weeks, unpaid breaks, overtime, and every pay period.

Money and Finance

Overtime Pay Calculator

Regular, overtime and double-time pay under the FLSA 40-hour rule or California daily overtime, with a pay stub breakdown.

Money and Finance

Discount Calculator

Sale price and savings from a percent off, stacked discounts, amount off, buy one get one, and the original price in reverse.

Money and Finance

Sales Tax Calculator

Add sales tax to a price or take it out of a total, with 2026 state rates, local tax, and a receipt-style breakdown.

Money and Finance

Rent vs Buy Calculator

True cost of renting vs buying over your stay, with breakeven year, equity, opportunity cost and a year-by-year table.

Money and Finance

House Affordability Calculator

How much house you can afford from income and debts under the 28/36 rule, with payment breakdown and rate scenarios.

Money and Finance

Student Loan Calculator

Student loan payment, payoff date and total interest on standard, extended, graduated and income-driven plans, with extra payments.

Money and Finance

Income Tax Calculator

2026 federal income tax estimate: brackets, standard deduction, effective and marginal rates, FICA, refund or amount owed.

Money and Finance

Budget Calculator

50/30/20 budget targets against what you actually spend, with leftover, savings rate and a printable monthly plan.

Money and Finance

Net Worth Calculator

Assets minus liabilities, debt to asset ratio, and how you compare with the Federal Reserve median for your age.

Money and Finance

Emergency Fund Calculator

How many months of expenses you need, what you have, the shortfall, and the date you reach your goal at 4.35% APY.

Money and Finance

Mortgage Refinance Calculator

Current vs new payment, break-even months, lifetime interest saved, cash-out mode, and the term-reset warning.

Money and Finance

Moving Cost Calculator

Local hourly or long-distance weight-based moving costs, with packing, storage, stairs, truck size and a DIY comparison.

Home and DIY

Square Footage Calculator

Square footage for rectangles, L-shapes, circles, triangles and trapezoids, with cut-outs, waste, conversions and cost.

Home and DIY

Wallpaper Calculator

Wallpaper rolls counted strip by strip with pattern repeat and match type, plus paste and total cost.

Home and DIY

Roofing Calculator

Roof area from pitch, squares, shingle bundles, underlayment, ridge cap, drip edge and nails, with material and labor cost.

Home and DIY

MPG Calculator

Miles per gallon from one fill-up, odometer readings or several fill-ups, with cost per mile and a two-car comparison.

Car and Travel

Fuel Cost Calculator

Trip fuel cost from distance, MPG and the AAA gas price, with round trip, monthly budget, car comparison and an EV check.

Car and Travel

Road Trip Cost Calculator

Full road trip budget: fuel, hotels, food, tolls and wear, split per person, with driving days, fuel stops and drive vs fly.

Car and Travel

Tire Size Calculator

Compare two tire sizes: diameter, sidewall, circumference, revs per mile, speedometer error and a fit check.

Car and Travel

Car Lease Calculator

Monthly lease payment from MSRP, residual and money factor, with due at signing, mileage cost and lease vs buy.

Car and Travel

EV Charging Cost Calculator

Cost to charge an EV at home or in public, per charge, per mile and per year, with a gas car comparison.

Car and Travel

Period Calculator

Next periods, fertile window and ovulation from your last period, with a 12 cycle calendar and cycle day today.

Health and Family

Water Intake Calculator

Daily water intake from weight, activity, exercise and climate, in litres, ounces, cups and bottles.

Health and Family

Body Fat Calculator

Body fat percent by the US Navy tape method plus a BMI cross-check, with fat mass, lean mass and goal.

Health and Family

Protein Calculator

Daily protein in grams from weight, goal and activity, with per meal splits and a range for every goal.

Health and Family

Heart Rate Zone Calculator

Training zones 1 to 5 from age and resting heart rate, Karvonen or percent of max, plus CDC target ranges.

Health and Family

Ideal Weight Calculator

Ideal weight from Devine, Robinson, Miller and Hamwi, with the healthy BMI range and frame size.

Health and Family

Walking Calorie Calculator

Calories burned walking by pace, weight and time, distance or steps, with a 10,000 step goal and weekly total.

Health and Family

Dog Age Calculator

Dog years to human years by breed size, AVMA rule and the epigenetic formula, with life stage and reverse lookup.

Health and Family

Cat Age Calculator

Cat years to human years with the 15, 9, 4 rule, life stage, birthday mode and indoor vs outdoor lifespan.

Health and Family

Conception Date Calculator

When did you conceive? From your last period, due date, birth date or ultrasound, with fertile window and due date.

Health and Family

Bra Size Calculator

Your bra size from two measurements, with sister sizes, US, UK, EU, French and Australian conversions and fit fixes.

Health and Family

Ring Size Calculator

Ring size from finger circumference or an existing ring, in US, UK, EU and Japanese sizes, with a printable sizer guide.

Health and Family

Shoe Size Converter

Convert shoe sizes between US men, US women, UK, EU and Japan, from a size or from your foot length, for adults and kids.

Health and Family

Final Grade Calculator

What do you need on the final? Score needed for every letter grade, what-if scenarios and a weighted grade builder.

Work and School

Hours Worked Calculator

Weekly time card: clock in and out each day, breaks, overtime over 40 hours and pay at your hourly rate.

Work and School

Date Calculator

Days between two dates in years, months and days, weekdays and business days, plus add or subtract days from any date.

Work and School

Days Until Calculator

Countdown to any date in days, weeks and months, with a live ticking clock, business days, holiday presets and saved countdowns.

Work and School

Pomodoro Timer

25 minute focus sessions with short and long breaks, presets, a task list and daily stats. No sign-up, no ads.

Work and School

Time Duration Calculator

Time between two times, add or subtract durations, add time to a clock, and total several intervals, in hours and decimal hours.

Work and School

Test Score Calculator

Turn right or wrong answers into a percent, letter grade and GPA, with grading scales and a full chart.

Work and School

Business Days Calculator

Count business days between two dates or add business days, skipping weekends and US federal holidays.

Work and School

Freelance Rate Calculator

Find the hourly rate that covers your take-home pay, taxes, expenses and benefits as a freelancer.

Work and School

Recipe Scaler

Scale any recipe up or down by servings, convert cups to grams and resize pans by area.

Food, Kitchen and Everyday

Split Bill Calculator

Split a restaurant bill evenly or by item, with tax, tip, discount, fees and leftover-cent rounding.

Food, Kitchen and Everyday

Coffee Ratio Calculator

Get the exact coffee and water for any brew method, with strength, grind size and cost per cup.

Food, Kitchen and Everyday

Pizza Quantity Calculator

How many pizzas to order for your party, with slices per person, sizes, cost and flavour mix.

Food, Kitchen and Everyday

Wedding Budget Calculator

Plan a wedding budget by category, track quotes against it and see what to save each month.

Food, Kitchen and Everyday

Grocery Budget Calculator

A USDA-based grocery budget for your household, by plan, plus dining out and income share.

Food, Kitchen and Everyday

Childcare Cost Calculator

Estimate daycare, home daycare and nanny costs by age, hours and state, with a tax credit estimate.

Food, Kitchen and Everyday

Electricity Cost Calculator

Cost of running any appliance by watts, hours and your state electricity rate, or from your bill.

Food, Kitchen and Everyday

Why people use ToolUstad

Fast by design

Each tool is a single lightweight page with no account walls and no upload queues. Results appear as you type.

Your data stays yours

Hashing, encoding, image compression and everything else happens on your device. Close the tab and nothing remains anywhere.

Real, checked results

Hashes are computed with real MD5 and SHA-256 code, QR codes are genuinely scannable, and records follow the published DNS specs.

Works on any device

Phone, tablet or desktop. Every tool is fully usable on a small screen, with big tap targets and no sideways scrolling.

About ToolUstad

ToolUstad is a free collection of online tools, from calculators and converters to generators and checkers. Every tool runs in your browser, so nothing is uploaded and nothing is stored. There is no sign-up and no cost: open a tool, use it, and copy or download your result.

Frequently asked questions

Do I need an account to use the tools?

No. There is no sign-up and no login. Open any tool and use it straight away.

Are the tools really free?

Yes. All tools are free, with no trial and no locked features. Open a tool, use it, and copy or download the result.

Is my data uploaded anywhere?

No. Every tool runs with JavaScript in your own browser. What you type, paste or open is processed on your device and never sent to a server.

Do the tools work on my phone?

Yes. Every tool works on a phone, tablet or desktop, with large tap targets and no sideways scrolling.

How do I save or share a result?

Most tools have Copy and Download buttons next to the result. Copy puts the result on your clipboard, and Download saves it as a file on your device.

Can I use the results for my business?

Yes. Anything you generate here, from QR codes to meta tags to DNS records, is yours to use in personal and commercial projects.

Are the calculator figures up to date?

Each tool that uses a rate or price shows the default we checked and the date we checked it. If you know the exact figure, enter it in the optional box and the tool will use yours instead. A link next to the value takes you to the page where you can check the current figure.

What do I do if a result looks wrong?

Check the numbers you entered first, then compare with the worked example on the tool page. If it still looks wrong, email us at [email protected] and tell us the tool and the numbers you used.

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