All 109 tools

Mortgage calculator

Work out the full monthly cost of a home loan, covering principal, interest, tax, insurance and PMI, with a year-by-year amortisation schedule.

Loan calculator

Find the monthly payment, total interest and full repayment schedule for any fixed-rate loan, whether car, personal, student or business.

Compound interest calculator

See how savings and investments grow over time, with regular contributions and any compounding frequency, plus a year-by-year balance table.

Percentage calculator

Work out a percentage of a number, express one number as a percentage of another, or find the percentage increase or decrease between two values.

Amortization calculator

Generate a full amortisation schedule payment by payment, find the crossover month, and see what an extra payment each month actually saves.

Refinance calculator

See what refinancing really saves: the new payment, how many months it takes to earn back closing costs, and what restarting the term costs you.

Retirement calculator

Project a retirement pot in today's money, see how much of it is growth rather than contributions, and estimate a sustainable income from it.

Salary calculator

Convert pay between hourly, daily, weekly, monthly and annual, accounting for hours worked and unpaid leave.

Tip calculator

Work out the tip and the total, split it between any number of people, and round the tip or the total up to a clean number.

Discount calculator

Work out a sale price, stack two discounts correctly, or find what percentage off you actually got.

Sales tax calculator

Add sales tax to a price or strip it back out of a total, with the arithmetic that catches almost everyone shown explicitly.

VAT calculator

Add VAT to a net price or extract it from a gross total, with rates for the UK, EU and other common jurisdictions.

ROI calculator

Calculate return on investment as a percentage and as an annualised rate, so holdings of different lengths can actually be compared.

Average Down Calculator

Add every purchase of a stock and see your true average price, the break even price once fees are counted, and how much more you would have to buy to reach the average you want.

Position Size Calculator

Size a trade from the loss you can afford rather than the cash you happen to have. Enter your capital, your risk per trade and your stop, and get the quantity, the money at risk and the reward to risk ratio.

BMI calculator

Calculate body mass index from height and weight in metric or imperial units, see which WHO category it falls in, and get the healthy weight range for your height.

Calorie calculator

Estimate the calories you burn each day using the Mifflin-St Jeor equation, with targets for maintaining, losing or gaining weight.

BMR calculator

Calculate basal metabolic rate using Mifflin-St Jeor, Harris-Benedict or Katch-McArdle, and see total daily burn at every activity level.

Ideal weight calculator

See what the four classic ideal-weight formulas say for your height, how far apart they are, and the BMI range that is more useful than any of them.

Body fat calculator

Estimate body fat percentage from a tape measure using the US Navy method, with fat and lean mass broken out and a BMI-based cross-check.

Macro calculator

Turn a daily calorie target into grams of protein, carbohydrate and fat, with presets for balanced, low-carb, endurance and ketogenic splits.

Due date calculator

Estimate a due date from a last period, a conception date or a known due date, with current gestational age, trimesters and key milestones.

Age calculator

Find an exact age in years, months and days from any date of birth, plus the total in weeks, days and hours and the countdown to the next birthday.

Date calculator

Count the days, weeks and working days between two dates, or add and subtract days, weeks, months and years from any date.

Scientific calculator

A full scientific calculator with trigonometry, logarithms, powers, roots and factorials. Type expressions directly or use the keypad.

GPA calculator

Calculate a grade point average from any number of courses on the unweighted 4.0 or weighted 5.0 scale, with credit hours taken into account.

Grade calculator

Work out your current weighted grade from assignments completed so far, and find the score you need on what remains to hit a target.

Time calculator

Add or subtract durations, or total a whole list of them, in any format people actually type: 1:30, 90m or 1h 30m.

Hours calculator

Total a week of shifts from start and end times, subtract breaks, handle overnight shifts, and optionally calculate gross pay with overtime.

Countdown timer

Count down live to any date and time, with days, hours, minutes and seconds, plus working days and the weekday it falls on.

Time zone converter

Convert a time across as many cities as you need at once, with daylight saving resolved for the actual date you entered.

Word counter

Count words, characters, sentences and paragraphs as you type, with reading time, speaking time and the most-used words in your text.

Character counter

Count characters with and without spaces as you type, and see live progress against SMS, X, meta description and title tag limits.

Case converter

Convert text between upper, lower, title, sentence, camel, Pascal, snake, kebab and constant case, plus alternating and inverse case.

Slug generator

Turn titles into clean URL slugs, converting accents properly, stripping filler words and handling a whole list at once.

Text diff

Compare two blocks of text and see exactly what changed, by line or by word, with insertions and deletions marked.

Lorem ipsum

Generate placeholder text by paragraph, sentence, word or list item, in classic Latin or in Indonesian for layouts that will hold Indonesian copy.

Remove line breaks

Strip unwanted line breaks from pasted text while keeping paragraph breaks, and tidy up the extra spaces and smart quotes that come with them.

Reverse text

Reverse text by character, by word order or by line order, with the character reversal handling emoji and accents correctly.

Password generator

Generate strong random passwords using your browser's cryptographic randomness, with entropy shown in bits and no password ever transmitted.

Random number generator

Generate random numbers in any range using cryptographic randomness, with options for no repeats and sorted output, for draws, sampling and testing.

QR code generator

Create QR codes for links, Wi-Fi networks, email, phone and SMS. Download as PNG or SVG, with no watermark, no account and no expiry.

JSON formatter

Format, validate and minify JSON with precise error locations, optional key sorting and a structural summary of what the document contains.

Base64 encode/decode

Encode and decode Base64 with full Unicode support, including a URL-safe alphabet, and encode any file to Base64 without uploading it.

UUID generator

Generate RFC-compliant UUIDs in bulk, either random v4 or time-sortable v7, with formatting options and no server involvement.

Hash generator

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text or any file, computed entirely on your device.

URL encoder/decoder

Percent-encode and decode URLs and query parameters, with a breakdown of any URL into its origin, path and decoded parameters.

Epoch converter

Convert Unix timestamps to human dates and back, in seconds or milliseconds, with a live clock and a relative-time readout.

JWT decoder

Decode a JSON Web Token to read its header and claims, with expiry checked and timestamps rendered as dates, all in your browser.

Colour converter

Convert between HEX, RGB and HSL, and check WCAG contrast against white and black in the same step.

UTM builder

Build correctly tagged campaign URLs, with existing UTM parameters replaced rather than duplicated and casing normalised.

Meta tag generator

Generate title, description, Open Graph and Twitter card tags with live length warnings and a search-result preview.

CSS minifier

Minify or beautify CSS with a parser that never corrupts strings, url() values or calc() expressions.

Regex tester

Test a regular expression against sample text with live highlighting, capture groups broken out, and replacement preview.

HTML encode/decode

Escape the five characters that break HTML, or decode any named or numeric entity back to plain text.

Base converter

Convert between binary, octal, decimal and hexadecimal using arbitrary-precision arithmetic, so 64-bit values stay exact.

Cron generator

Build or decode a cron expression, read it back in plain English, and see the next eight times it will actually fire.

Robots.txt generator

Build a robots.txt with multiple user-agent groups, sitemap declarations and an optional block for AI training crawlers.

Keyword density

Analyse which words and phrases dominate a piece of copy, check a specific target keyword, and see whether anything reads as overused.

SERP preview

See how a title and description will render in search results, measured by pixel width rather than character count.

Schema generator

Generate valid JSON-LD for Organization, LocalBusiness, Article, Product, FAQPage and BreadcrumbList, ready to paste into your head.

Image compressor

Compress images by quality or to a target file size, in batches, with the original never leaving your device.

Image to text

Pull the text out of a photo, screenshot, scan or PDF, as plain text or with the headings, lists and tables kept intact.

Batch image to text

Read text from a whole folder of images or a long PDF in one pass, then take it as one file or one text file per page.

Image resizer

Resize an image to exact pixel dimensions or a percentage, with aspect ratio locking and presets for common social and web sizes.

Image converter

Convert images between JPG, PNG, WebP and AVIF in batches, with quality control and transparency handled correctly.

Image translator

Read the text out of a photo on your device, then translate it, with the headings, lists and tables kept in place.

HEIC to JPG

Convert iPhone HEIC photos to JPG in batches, on Windows and Android as well as on a Mac.

QR code scanner

Read a QR code with your camera or from a screenshot, and see what it actually contains before you act on it.

Barcode scanner

Read EAN, UPC, Code 128, ITF, Data Matrix and PDF417 with your camera or from a photo, with the check digit verified.

JPG to PNG

Convert JPG and JPEG photos to lossless PNG in batches, entirely inside your browser.

PNG to JPG

Convert PNG images to JPG with adjustable quality and transparency flattened to white, all inside your browser.

WebP to PNG

Convert WebP images to PNG with transparency preserved, for software that will not open WebP files.

Image to Base64

Convert an image to a Base64 data URI, ready to paste into CSS or HTML, with guidance on whether inlining is worth it.

Favicon generator

Generate the favicon and app icon sizes that still matter in 2026, with a maskable variant and the HTML to install them.

TinyPNG alternative

The same class of compression the popular upload based services use, running inside your browser instead of on their servers.

PDF merge

Combine any number of PDFs into one document in the order you choose, without uploading a single page.

PDF split

Extract specific pages, split into one file per page, or break a document into fixed-size chunks, without uploading it.

PDF compress

Shrink a PDF either losslessly, keeping text sharp and selectable, or aggressively by redrawing pages as images, with the trade-off stated plainly.

Bulk PDF compress

Queue a folder of PDFs, compress every one of them with the same settings, and take the whole batch away as a ZIP.

PDF to JPG

Turn PDF pages into JPG or PNG images at any resolution, choosing which pages to convert, with everything rendered in your browser.

Word to PDF

Turn a .docx into a PDF inside your browser, keeping headings, lists, tables and pictures, without the document ever leaving your device.

cm to inches

Convert centimetres to inches and back using the exact international factor, with a reference chart and the formula shown.

Video converter

Convert MOV, MKV, AVI, WebM and MP4 in any direction, with the whole conversion running inside your browser.

kg to lbs

Convert kilograms to pounds and back with the exact international factor, plus a reference chart and stone conversions.

MOV to MP4

Turn iPhone and QuickTime MOV files into MP4, usually without re-encoding a single frame.

Celsius to Fahrenheit

Convert °C to °F and back with the formula shown, plus a reference chart of everyday and body temperatures.

MKV to MP4

Convert Matroska MKV files to MP4 in seconds, copying the video across rather than re-encoding it.

AVI to MP4

Bring old AVI footage from camcorders and 2000s-era files into MP4 that modern devices will actually play.

Feet to metres

Convert feet to metres and back with the exact international factor, plus a chart covering heights, room sizes and altitudes.

Miles to km

Convert miles to kilometres and back with the exact factor, plus speed limits, running distances and a reference chart.

WebM to MP4

Convert WebM recordings and downloads to MP4 so phones, editors and social platforms will accept them.

Audio converter

Convert between MP3, M4A, WAV, AAC, OGG and FLAC in batches, with the bitrate under your control.

MB to GB

Convert megabytes to gigabytes in both the decimal (1000) and binary (1024) conventions, and see why your drive looks smaller than the box said.

MP3 converter

Turn any audio or video file into MP3, at a bitrate you choose, without uploading it anywhere.

M4A to MP3

Convert iPhone voice memos, iTunes tracks and other M4A files to MP3 that anything will play.

mph to km/h

Convert mph to km/h with the exact factor, plus a speed-limit chart for driving abroad and the mental arithmetic that gets you close.

sq ft to sq m

Convert square feet to square metres with the exact factor, plus why area conversion squares the length factor and a chart of common property sizes.

WAV to MP3

Compress large WAV recordings into MP3 at a bitrate you choose, without uploading anything.

Gallons to litres

Convert US and imperial gallons to litres with exact factors, and see why the two gallons differ by twenty per cent.

MP3 to WAV

Decode MP3 files to uncompressed 16-bit WAV for editing, transcription and software that refuses compressed audio.

Inches to cm

Convert inches to centimetres with the exact factor of 2.54, plus screen sizes, paper sizes and a full reference chart.

lbs to kg

Convert pounds to kilograms with the exact factor, plus body weight, luggage allowance and gym plate references.

Fahrenheit to Celsius

Convert °F to °C with the formula shown, plus oven temperatures, body temperature and a weather reference chart.

KB to MB

Convert kilobytes to megabytes in both the decimal and binary conventions, with a reference chart of common file sizes.

Cups to ml

Convert cups to millilitres, with the three different cups explained and a note on why baking should be weighed instead.

Knots to km/h

Convert knots to km/h and mph with the exact factor, plus a Beaufort wind scale reference and why aviation still uses them.

MP4 to MP3

Pull the soundtrack out of an MP4 and save it as MP3, without the video ever leaving your device.

Video to MP3

Extract the soundtrack from MP4, MOV, MKV, AVI or WebM and save it as MP3, all inside your browser.