All tools

Create strong random passwords with full control over length and characters.

Format, validate and minify JSON, with errors that point to the exact line.

Work out any percentage — of a number, as a share, or as a change.

Count words, characters, sentences and paragraphs as you type.

Convert between length, weight, temperature, volume, speed, data and more.

Count characters with and without spaces, against the limits that matter.

Find the mean, median, mode and range of a list of numbers, with the working shown.

See how savings grow with compounding, including regular contributions.

Shrink JPEG, PNG and WebP files with a quality slider and a live size comparison.

Check whether your page title fits the search snippet, and where the keyword sits.

Convert text between twelve cases — upper, lower, title, camel, snake and more.

Estimate a monthly mortgage payment including tax, insurance and deposit.

See an approximation of how your title, URL and description may appear in results.

Compare two pieces of text and see exactly what changed, line by line.

Resize images by pixel dimensions or percentage, with the aspect ratio locked or free.

Calculate the monthly payment, total interest and full cost of a loan.

Test how strong a password really is, and see exactly what weakens it.

Combine several PDFs into one document, in the order you choose.

Test regular expressions live, with highlighted matches and capture groups.

Sample and population standard deviation and variance, both shown, with the working.

Encode text to Base64, including full Unicode and URL-safe output.

Turn CSV into JSON, with quoted fields and embedded commas handled properly.

Work out a sale price, the amount saved, and what stacked discounts really come to.

Turn a logo into favicon.ico, the PNG sizes a site needs, and the HTML to declare them.

Check a downloaded file against its published checksum, without uploading anything.

Convert between JPEG, PNG and WebP, with quality control and transparency handling.

Compare times across cities and convert a meeting time between zones.

Stamp text like DRAFT or CONFIDENTIAL across a PDF, in your browser.

Decode Base64 back to readable text, with clear errors when it is not valid.

Project investment growth from a lump sum and regular contributions.

Work out an exact age in years, months and days, plus the next birthday.

Explain a cron expression in plain English and see exactly when it will next run.

Turn JSON into readable YAML, with quoting and multiline strings handled properly.

Work out the tip and split the bill, with big buttons for common percentages.

Decode JSON Web Tokens and read the header, claims and expiry.

Convert a salary between hourly, daily, weekly, monthly and annual.

Escape text for HTML, or turn entities back into readable characters.

Generate version 4 and version 7 UUIDs in bulk, using secure randomness.

Generate random numbers in any range, whole or decimal, with no repeats.

Convert Unix timestamps to dates and back, in seconds or milliseconds.

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes at once.

Calculate profit margin from cost and revenue, with markup shown alongside.

Pick a colour and get HEX, RGB and HSL values with contrast checking.

Create QR codes for URLs, text, WiFi and contact details, and download as PNG or SVG.

Check description length, truncation and keyword use before it reaches a results page.

Split a PDF into separate documents at the points you choose.

Build a valid robots.txt with the right group structure and directive order.

Turn a JSON array of objects into CSV, with correct escaping.

Replace text across a document, with optional regular expressions.

Pull specific pages out of a PDF into a new document.

Word count, reading time, sentence length and readability for a piece of writing.

Build a valid XML sitemap from a list of URLs, with correct escaping and dates.

Generate a full payment schedule showing principal, interest and balance.

Check a sitemap against the protocol — structure, namespace, dates and limits.

Add or subtract days from a date, or find the difference between two dates.

Crop an image to an exact region, by hand or to a fixed aspect ratio.

Calculate a percentage increase and see the amount it adds.

Turn a broken-up block of text into continuous paragraphs.

Generate valid JSON-LD for Article, Product, LocalBusiness, FAQ and more.

Turn any title into a clean, readable URL slug — accents and all.

Turn photos and scans into a PDF, one image per page.

Generate Open Graph tags so links to your page preview correctly when shared.

Project retirement savings and see the gap against your target.

Generate a complete, correctly escaped <head> block in one place.

See the EXIF data hidden in a photo — camera, timestamp and GPS location.

Generate memorable passphrases that are strong because they are long.

Rotate PDF pages by 90, 180 or 270 degrees — all of them or just some.

Add or remove sales tax at any rate, in either direction.

Strip EXIF and GPS data from a photo before you share it.

Convert PNG images to JPEG, with a background colour for transparent areas.

See what regular saving builds up to, and how long a goal will take.

Pull the dominant colours out of an image as hex, RGB and CSS variables.

Check a page’s heading outline for missing h1, skipped levels and empty headings.

Convert JPEG photos to PNG, losslessly from that point on.

Convert millimetres, metres, kilometres, inches, feet, yards and miles instantly.

Calculate return on investment, and the annualised rate that makes it comparable.

Generate a SHA-256 hash of any text, computed in your browser.

Build campaign URLs with correctly encoded UTM parameters.

Add VAT, remove VAT, or find the VAT inside a gross amount.

Stamp page numbers onto a PDF, in the corner and format you choose.

Measure how often a keyword appears in your text, and where.

Split a bill between any number of people, including tip and tax.

Convert images to and from WebP, usually the smallest format at the same quality.

Inspect a PDF’s title, author, creator, producer and dates.

Convert grams, kilograms, tonnes, ounces, pounds and stones instantly.

Indent and validate XML, with clear messages when tags do not match.

Turn an image into a Base64 data URI you can paste straight into HTML or CSS.

See how inflation changes what an amount is worth over time.

Convert Celsius, Fahrenheit and Kelvin, with the formulas shown.

Convert between text, decimal, binary, hexadecimal and octal.

Rotate an image in 90° steps or by any angle, with a live preview.

Work out what a raise is worth per year, per month and after inflation.

Calculate simple interest with the formula shown alongside the result.

Tidy YAML indentation, validate structure and convert between YAML and JSON.

Count down to any date and time, with start, pause and reset.

Calculate a selling price from cost and markup, with the margin shown.

Find how many units you must sell to cover your costs.

Format SQL queries across dialects, with consistent keyword casing and indentation.

Sort lines alphabetically, numerically or by length, in either direction.

Convert HEX colour codes to RGB and HSL, including alpha values.

Turn an hourly rate into daily, weekly, monthly and annual pay.

Pick a random winner from a list, or shuffle the whole list fairly.

Calculate a credit-weighted GPA across any number of courses.

Convert RGB and RGBA colour values into HEX codes.

Generate thousands of UUIDs at once and export them as TXT, CSV or JSON.

Create linear and radial CSS gradients visually and copy the code.

Remove duplicate lines while keeping the original order, with statistics.

Roll D4 to D100 dice, several at once, with modifiers and history.

Generate secure random strings, passwords and API keys with entropy shown.

Build CSS box shadows visually and copy the generated code.

Translate text to Morse code and back, with clear separators.

Generate placeholder text by paragraphs, sentences, words or list items.

Check whether a specific URL is allowed for a specific crawler, and see which rule decided it.

Remove pages from a PDF and keep everything else intact.

Collapse repeated spaces, strip trailing whitespace and tidy blank lines.

Check pasted JSON-LD for syntax errors and structural problems.

Generate twitter: meta tags for link previews on X, with the right card type.

Produce a canonical link tag and check the URL for the mistakes that break it.

Build hreflang annotations for multilingual sites, validated as a set.

Analyse the links in pasted HTML — internal, external, anchor text and duplicates.

Calculate a percentage decrease and the amount it removes.

Remove the author, title and producer information from a PDF.

Percent-encode and decode URLs, with the component and full-URL modes kept apart.

Generate redirect rules for Apache, Nginx or Next.js, with paths escaped correctly.

Repeat text any number of times, with a separator and optional numbering.

Measure how hard an image has been compressed, and whether it is worth optimising.

Paste Base64 image data and get a viewable, downloadable image back.

Mirror an image horizontally or vertically, with an instant preview.

Format JavaScript and TypeScript with the same rules your editor uses.

Indent messy HTML into readable, consistently structured markup.

Format and tidy CSS, SCSS and Less with consistent spacing and indentation.

Flip a virtual coin for a fair fifty-fifty decision, with running totals.

Generate an MD5 hash for checksums, cache keys and legacy systems.

Convert numbers to Roman numerals and back, with strict validation.

Generate Code 128 barcodes as scalable SVG, ready for labels and print.