Everything free.
No signup. No subscription.

Why these run in your browser

Counting words, turning a link into a QR code, converting kilograms to pounds, measuring the contrast between two colours — none of these need a server. A browser can finish any of them in a fraction of a second on the device already in your hand.

So that is where they run. Whatever you type into a tool on this site stays in the tab and is gone when you close it. Nothing is uploaded, nothing is logged, and there is no upload progress bar to sit through. It also means there are no server bills to recover, which is why every tool here is free with no trial, no premium tier and no daily cap.

What you can do here

PDF Tools

• Image to PDF — Combine any number of JPG or PNG images into one PDF, in the order you choose.
• Merge PDF — Combine multiple PDF files into one, in the order you drag them.
• Split PDF — Every page as its own file, or the exact ranges you type.
• Rotate PDF — Rotate every page, or just the ones you choose.
• Organize PDF — Delete, keep or reorder pages with one page-number field.
• PDF to JPG — Export every page of a PDF as a JPG image.
• Invoice Generator — Fill in the details and download a clean PDF invoice — no account, nothing uploaded.
• Add Page Numbers to PDF — Number the pages of any PDF, with position, format and a starting number.
• PDF Watermark — Stamp DRAFT or your own text across every page, with size, angle and opacity.

Image Tools

• Image Resizer — Resize an image to exact dimensions, with the aspect ratio locked or free.
• Image Compressor — Shrink an image's file size with a quality slider, before/after compared live.
• Image Format Converter — Convert between JPG, PNG and WebP, right in your browser.
• Image Cropper & Rotator — Crop to an exact area and rotate in 90° steps, with a live preview.
• SVG to PNG Converter — Convert an SVG file to a PNG image at any size, right in your browser.
• Watermark Adder — Add a text watermark to an image, with position and opacity control.
• Meme Maker — Add classic top and bottom captions to any image and download it.
• Collage Maker — Combine 2 to 4 photos into one grid collage, right in your browser.
• Chart Creator — Turn a simple list of labels and numbers into a bar or pie chart image.
• Social Media Image Resizer — One image resized to every platform's dimensions, cropped and zipped.
• Image to Base64 Converter — Turn an image into a data URI for CSS, HTML or JSON, with the size cost shown.
• Background Remover — Remove a photo's background with AI that runs in your browser — nothing uploaded.
• Bulk Background Remover — Cut the background from a batch of photos and download them all as a ZIP.

AI Tools

• AI Prompt Generator — Describe what you want, pick the details that matter, and copy a clean prompt as JSON or plain text.

Calculators

• Mortgage Calculator — Monthly payment including taxes and insurance, from home price and down payment.
• Compound Interest Calculator — How savings or a fixed deposit grow with compounding, at any frequency.
• Retirement Savings Calculator — Projected savings at retirement from what you have now and add monthly.
• Home Affordability Calculator — A realistic home price range from your income, debts and down payment.
• Salary to Hourly Calculator — Convert an annual salary to an hourly rate, or the other way round.
• Freelancer Rate Calculator — The hourly rate you need to charge to hit a target income after expenses.
• Inflation Calculator — What today's money will be worth, or cost, years from now at a given inflation rate.
• Sales Tax / GST Calculator — Add tax to a price, or find the pre-tax amount from a tax-inclusive total.
• Crypto Profit / Loss Calculator — Profit or loss on a trade from your buy price, sell price and amount invested.
• Paint & Flooring Calculator — How much paint or flooring to buy for a room, waste margin included.
• Timezone / Meeting Planner — See what time it is anywhere else, for scheduling calls across time zones.
• Pomodoro Timer — A focus timer with work and break intervals, right in your browser tab.
• Loan & EMI Calculator — Monthly payment, total interest and total repayment for any loan.
• Discount Calculator — Final price, what you save, and what stacked discounts really come to.
• Percentage Calculator — Four common percentage problems, solved instantly.
• Age Calculator — Exact age in years, months and days, with a next-birthday countdown.
• Date Difference Calculator — The span between any two dates, including working days.
• Unit Converter — Length, weight, volume, speed, storage and four more.
• Credit Card Payoff — See how long a card takes to clear, the interest it costs, and what paying extra saves.
• Rent vs Buy — Compare renting against buying over any number of years, and find the break-even point.
• Emergency Fund — Size a safety fund from your real monthly essentials, and see how long it takes to build.
• Savings Goal — Enter a target and a deadline to get the monthly amount that reaches it.
• Debt Payoff Planner — Compare the snowball and avalanche methods on your own debts, side by side.
• ROAS & Ad Spend — Return on ad spend, true profit after cost of goods, and break-even ROAS.
• Break-even Point — How many units cover your fixed costs, and the margin of safety on top.
• Profit Margin & Markup — Convert between margin and markup, and price for a target margin.
• MRR to ARR & Churn — MRR to ARR, churn, customer lifetime and where growth levels off.

Health

• Body Fat Calculator — Estimate body fat percentage from tape-measure measurements, US Navy method.
• Pregnancy Due Date Calculator — Estimated due date and current week of pregnancy from your last period.
• Water Intake Calculator — A daily water target from your weight and activity level.
• Heart Rate Zone Calculator — Training zones from light to maximum effort, based on your age.
• Sleep Cycle Calculator — Bedtimes or wake times aligned to full 90-minute sleep cycles.
• Ideal Weight Calculator — A healthy weight range for your height, plus BMI, BMR and daily calories.
• Calorie & TDEE Calculator — Your BMR, daily calorie total and targets for losing, holding or gaining weight.

Design

• CSS Gradient Generator — Pick colors and angle, get the CSS code — linear or radial.
• Aspect Ratio Calculator — Find a missing width or height, or scale to a standard ratio like 16:9.
• Box-Shadow & Glassmorphism Generator — Sliders for offset, blur and spread, or a one-click glass effect — copy the CSS.
• Fancy Fonts Generator — Turn plain text into 𝗯𝗼𝗹𝗱, 𝘪𝘵𝘢𝘭𝘪𝘤 and other styles for bios and captions.
• Lorem Ipsum Generator — Placeholder text by paragraph, sentence or word for mockups.
• Color Palette Generator — Lockable five-colour palettes you can export as CSS.
• Color Contrast Checker — WCAG AA / AAA pass or fail, checked instantly.
• Colour Format Converter — HEX, RGB, HSL, HSV and CMYK from one colour, with luminance.
• Border Radius Generator — Shape each corner visually, elliptical radii included, and copy the CSS.
• Type Scale Generator — A modular type scale from one base size and ratio, as CSS variables.
• Hex Colour Matcher — Read a hex code and pick the swatch it describes — ten rounds.

Text & Dev

• UUID Generator — Generate one or many random UUIDs, using your browser's own crypto.
• Hash Generator — SHA-1, SHA-256, SHA-384 or SHA-512 hash of any text, computed in your browser.
• Password Strength Checker — See how strong a password is, and why, without it ever leaving your browser.
• Base64 Encoder / Decoder — Encode text to Base64 or decode it back, handling full Unicode correctly.
• URL & HTML Entity Encoder — Encode or decode a URL component, or convert HTML entities like & and <.
• Social Media Character Counter — Check a post against X, Instagram, LinkedIn, Facebook, TikTok and YouTube limits at once.
• Text to Speech — Listen to any text read aloud using your browser's built-in voices.
• Text Reverser — Reverse text — by character, by word, or flip the word order.
• Palindrome Checker — Check if a word or phrase reads the same forwards and backwards.
• Morse Code Translator — Translate text to Morse code and back, with an audio playback option.
• Upside Down Text Generator — Flip text ʇxǝʇ ǝpᴉsdn upside down for bios and captions.
• Word & Character Counter — Live counts, keyword density and a readability score.
• Case Converter — UPPERCASE, Title Case, camelCase, snake_case and five more.
• JSON Formatter & Validator — Format, minify and validate JSON, with the exact line that broke.
• Password Generator — Strong, random passwords with a strength meter, generated on your device.
• JWT Decoder — Read a token's header, payload, algorithm and expiry — nothing uploaded.
• Diff Checker — Compare two texts line by line and see exactly what changed.
• Duplicate Line Remover — Deduplicate a list, or pull out only the lines that repeated.
• Find & Replace — Bulk replace across a whole document, with regex and whole-word options.
• Character Frequency Counter — Count how often each letter, character or word appears.
• Video Script Timer — How long a script takes to speak, at your pace, with pauses counted.
• Hashtag Counter & Cleaner — Count and deduplicate hashtags, and check them against each platform limit.

Typing

• Typing Speed Test — Test your typing speed and accuracy — WPM, live letter-by-letter feedback.
• Click Speed Test (CPS) — Measure your clicks per second over 1, 5 or 10 seconds.
• Meteor Defense — Type the falling word before the meteor hits your base.
• Zombie Survival — Type each approaching word before the zombie reaches you.
• Neon Racer — The fastest of the typing games — three lives, quicker waves, no let-up.
• Balloon Pop — The gentlest typing game — balloons rise slowly, five lives, no rush.
• Ghost Hunt — The busiest typing game — up to nine ghosts on screen at once.

QR Codes

• QR Code Generator — Links, Wi-Fi, contact cards and more, encoded and downloadable.
• Bulk QR Code Generator — Paste a list and get a QR code for every row, named and zipped.
• QR Code Reader — Read a QR code from an image or camera and see the content before opening it.
• Barcode Generator — EAN-13, UPC-A and Code 128 with a proper check digit, downloadable as PNG.

Math Tools

• Fraction Calculator — Add, subtract, multiply or divide fractions, simplified automatically.
• Ratio Calculator — Simplify a ratio, or scale it to find a missing value.
• Average Calculator — Mean, median, mode and range from any list of numbers.
• Standard Deviation Calculator — Population and sample standard deviation, with variance and mean.
• Tip Calculator — Tip amount and per-person split for any bill.
• GPA Calculator — Weighted GPA from your course grades and credit hours.
• Bill Splitter — Split a restaurant bill fairly when everyone didn't order the same amount.
• Random Number Generator — Pick random numbers in a range, with or without repeats.
• Random Team & Name Picker — Paste a list of names, split into random teams or pick random winners.
• Trip Expense Splitter — Track group expenses on a trip and see exactly who owes whom, simplified.
• Binary, Hex & Decimal Converter — Convert numbers between binary, octal, decimal and hexadecimal.
• Roman Numeral Converter — Convert between numbers and Roman numerals, both directions.
• Zodiac Sign Calculator — Find your zodiac sign from a birth date, with dates and traits.
• What Day Was I Born — Find the exact day of the week you were born, plus fun facts.
• Countdown Timer — Count down to any date and time — a birthday, launch or deadline.
• Reaction Time Test — Test how fast you react to a visual cue, in milliseconds.
• Mental Math Speed Drill — A timed arithmetic drill — pick the operations and race the clock.
• Prime Number Checker & Factoriser — Test primality, get the full factorisation, divisors and nearest primes.
• LCM & HCF Calculator — LCM and HCF of any set of numbers, with the working shown.
• Quadratic Equation Solver — Roots, discriminant, vertex and factored form for any quadratic.
• Number to Words Converter — Spell any number out in words, including cheque and invoice wording.
• Visual Memory Test — Squares flash on a grid — tap the ones you saw, and the grid keeps growing.
• Number Memory Test — A sequence of digits appears, then vanishes. Type it back, one digit longer each level.
• Aim Trainer — Hit thirty targets as fast as you can, with accuracy measured alongside speed.
• Chimp Test — Click the numbers in order from memory — the task chimpanzees beat humans at.

Common questions