All tools

Check the AMP rules that break a page outright.

Check your anchor text spread for over-optimisation.

Generate BreadcrumbList JSON-LD for your navigation path.

Check a page's canonical link for the usual mistakes.

Build a clean canonical link and catch the URL mistakes.

Measure how much of a page is content versus markup.

Generate a structured brief and outline for a writer.

Format a Google disavow file from a list of bad links.

Generate domain ideas from your keywords.

Turn questions and answers into FAQPage JSON-LD.

Check whether your content is shaped to win a snippet.

Build a direct link that opens the Google review box.

Check your H1-H6 order and catch skipped levels.

Validate the hreflang tags on a page.

Generate hreflang tags for a multi-language site.

Find images with missing or unhelpful alt text.

Break down internal, external and broken-anchor links.

Mix keyword lists into every combination.

See where your keyword sits, not just how often it appears.

Work out what ranking for a keyword is worth per month.

Generate LocalBusiness JSON-LD with address, hours and location.

Generate title, description, robots and canonical tags.

Pull every SEO tag out of a page and grade it.

Compare your name, address and phone across listings.

Build local keyword variations for every location you serve.

See which outbound links pass ranking signal.

Generate Open Graph and Twitter tags for link previews.

Generate .htaccess or nginx redirect rules from a list.

Generate Review or AggregateRating JSON-LD.

Control indexing and snippets with a robots meta tag.

Build a robots.txt with the right rules and a sitemap line.

Test whether a URL is blocked before you deploy.

Run every on-page check at once and get a score.

See how your title and description will read in Google.

Generate JSON-LD for articles, products, events and more.

Check a sitemap for duplicates, bad URLs and size limits.

Check JSON-LD for the fields Google actually requires.

Generate Twitter Card tags for rich link previews.

Turn any title into a clean, SEO-friendly slug.

Build tagged campaign URLs that track correctly.

Turn a list of URLs into a valid XML sitemap.

Project a workplace pension including the employer match.

Find the true APR once fees are included in the cost of a loan.

Add or subtract days from any date.

Work out an exact age in years, months and days.

See a year-by-year breakdown of interest and principal on a loan.

Find the future and present value of a regular payment stream.

Find the area of a rectangle, triangle, circle or trapezoid.

Convert square metres, feet, acres, hectares and miles.

Find the mean, median, minimum and maximum of a list of numbers.

Calculate body mass index and see which range it falls in.

Estimate your basal metabolic rate and daily calorie needs.

Estimate blood alcohol concentration from drinks and time.

Estimate body fat percentage from tape measurements.

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

See the monthly cost and total interest on a car loan.

Estimate your yearly CO2 from driving, electricity and flights.

Work out sales commission and total earnings.

See what savings grow to with compound interest.

Work out how much concrete a slab needs.

Convert cups, tablespoons, teaspoons, millilitres and more.

Count the days until (or since) any date.

Find out how long a card balance takes to clear, and the interest cost.

Convert bytes, KB, MB, GB, TB and bits.

Count the days, weeks and months between two dates.

See how long a fixed monthly payment takes to clear a debt.

Roll any number of dice with any number of sides.

See the sale price and how much a discount saves you.

Work out dividend income and yield from your holding.

Work out a deposit and the loan amount left over.

Calculate an equated monthly instalment for any loan term in months.

See what an appliance costs to run per day, month and year.

Convert joules, calories, watt-hours and BTU.

Raise any number to any power.

Work out maturity on a fixed or recurring deposit.

Add, subtract, multiply or divide two fractions.

Work out the fuel needed and the cost of a journey.

Convert between mpg, km/l and L/100km.

Find the future or present value of a sum of money.

Find the greatest common factor and lowest common multiple.

Calculate a weighted grade point average from grades and credits.

Work out a weighted grade and what you still need to score.

See an ideal weight for your height plus the healthy BMI range.

See how inflation changes what your money is worth.

Calculate return on investment and the annualised rate.

Convert between mm, cm, m, km, inches, feet, yards and miles.

Work out the monthly payment and total interest on any loan.

Calculate a logarithm in any base, plus ln and log10.

See what a one-off investment grows to.

Split a calorie target into protein, carbs and fat.

Work out profit, markup and margin from cost and price.

Work out mileage reimbursement for a journey.

Estimate a home loan payment from price, deposit, rate and term.

Total up assets and debts to find your net worth.

Convert between binary, octal, decimal, hex and any base to 36.

Enter any two of volts, amps and ohms to find the rest.

Estimate your one-rep max and training percentages.

Calculate overtime pay and total earnings for a week.

Find your likely ovulation date and fertile window.

Work out running pace per kilometre and per mile.

Work out how much paint a room needs.

Estimate take-home pay from gross salary and your deduction rates.

Find a percentage of a number, plus the value with it added or removed.

Work out the percentage increase or decrease between two numbers.

Work out what percentage one number is of another.

Find the perimeter or circumference of common shapes.

Calculate nPr and nCr for any n and r.

Convert watts, kilowatts, megawatts and horsepower.

Estimate a due date from the last period.

Convert between Pa, kPa, bar, psi, atm and mmHg.

Find prime factors and all divisors of a number.

Work out probability, odds and the chance over repeated trials.

Solve ax² + bx + c = 0, including complex roots.

Generate random numbers in any range, with or without repeats.

Simplify a ratio and see it as a decimal and a percentage.

Compare your current loan with a new one and find the break-even point.

Read a resistor's value from its colour bands.

Project your retirement pot and the income it could provide.

Find the square root, cube root or any nth root of a number.

Round a number to any number of decimal places, up or down.

See what a monthly investment grows to over time.

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

Find out how long it takes to reach a savings target.

Evaluate any arithmetic expression, with roots, logs and trig.

Convert shoe sizes between US, UK and EU.

Calculate simple interest and the total repayable.

Find the best times to wake up based on sleep cycles.

Find slope, distance and midpoint between two points.

Convert km/h, mph, m/s, knots and feet per second.

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

Calculate standard deviation, variance and mean for a data set.

Find your daily calorie needs and targets for losing or gaining weight.

Find your training heart rate zones.

Convert between Celsius, Fahrenheit and Kelvin.

Work out how many tiles a floor or wall needs.

Add or subtract hours and minutes from a time.

Find the time between two clock times.

Convert a time between any two world time zones.

Work out a tip and split the bill between people.

Find area, perimeter and angles from three sides.

Compare two pack sizes and see which is better value.

Add VAT to a price or work backwards to the net amount.

Find the volume of a box, cylinder, sphere or cone.

Convert litres, millilitres, cups, pints, quarts and gallons.

Work out how much water to drink a day for your weight.

Convert between grams, kilograms, ounces, pounds and stone.

Work out hours worked in a shift, and pay if you add a rate.

Running header and footer with page numbers.

Place a logo or picture on chosen pages.

Stamp text onto any page of a PDF.

Interleave two PDFs — for odd and even scanner passes.

Sequential legal numbering across a whole production.

See exactly what changed between two PDFs.

Blank, lined, gridded or dotted pages.

Add text boxes and checkboxes to a PDF.

Trim the margins off every page.

Convert an ebook into a PDF you can print.

Whiten and sharpen a scanned or photographed document.

Pull out embedded images at full resolution.

Pull out files embedded inside a PDF.

Read every filled field out of a PDF form.

Find tables and export them as CSV.

Pull the text out as TXT, Markdown or JSON.

Fill a PDF form from JSON or name=value lines.

Bake annotations and form fields so nothing stays editable.

Convert a PDF to greyscale for cheaper printing.

Turn pasted HTML into a paginated PDF.

Insert one PDF into another at any point.

Combine one or more images into a single PDF document.

Linearise so page one shows before the rest downloads.

Reduce PDF file size by compressing streams and cleaning unused objects.

Pull a selection of pages out of a PDF into a new file.

Combine multiple PDF files into a single document.

Inspect title, author, page count and other PDF metadata.

Reorder or keep a subset of PDF pages (e.g. 3,1,2 or 1-2,5).

Add page numbers to every page of a PDF.

Add password protection (encryption) to a PDF.

Rotate all pages of a PDF by 90, 180 or 270 degrees.

Split a PDF into separate pages or extract a page range.

Render each page of a PDF to a JPG or PNG image.

Extract the text of a PDF into an editable Word (.docx) document.

Remove password protection from a PDF you own.

Stamp a text watermark diagonally across every page.

Encode a PDF as Base64 or a data URI.

Build a reflowable ebook from a PDF.

Convert a PDF into a readable HTML page.

Permanently remove words from a PDF, not just cover them.

Strip author, software and timestamps from a PDF.

Delete pages from a PDF and keep the rest.

Rebuild a damaged PDF so it opens again.

Scale every page onto A4, Letter or another size.

Place a signature image on a page and lock it in.

Shorten a PDF to its most important sentences.

Turn plain text or Markdown into a formatted PDF.

Convert a Word (.docx) document to PDF (text content).

Add a solid, double or polaroid frame.

Put a caption on a photo, with an outline that stays readable.

Swap a plain background for a colour, a blur or another image.

Remove an image background with AI — runs privately in your browser.

Generate a barcode (Code128, Code39, EAN-13) from text.

Decode a Base64 string or data URI back into an image file.

Greyscale, dithered, or a hard two-tone threshold.

Blur or pixelate a whole image, or just one area.

Resize many images at once, by size or percentage.

Embed an image in CSS as a data URI.

Flat colour plus ink outlines, for a drawn look.

Crop any photo into a circle with a transparent background.

Arrange several photos into a clean grid.

See the tonal spread and check the exposure.

Pull a colour palette out of any image, with CSS.

Check the DPI and see the real printed size.

Find the one colour an image reads as.

Strip metadata, including the GPS location in phone photos.

Every favicon size a site needs, plus the HTML.

Build an animated GIF from images, or split one into frames.

RGB split and scanline glitch, with an optional deep fry.

Make a gradient image and get the matching CSS.

Brightness, contrast, saturation, sharpness and gamma.

Read the exact colour at any pixel.

Compress JPG, PNG and WebP images while keeping good quality.

Crop an image to a chosen rectangle.

Size, ratio, megapixels and file weight at a glance.

Sepia, vintage, duotone, posterize and more.

View EXIF and basic metadata of an image.

Resize images to exact pixel dimensions.

Rotate an image by a chosen angle.

Cut an image into a grid for a carousel post.

Convert an image into a Base64 data URI.

Add a text watermark to one or more images.

Turn a picture into text art.

Convert JPG images to PNG format.

Top and bottom captions in the classic meme style.

Add a directional streak, like a panning camera.

Shrink PNG files by reducing the palette, losslessly encoded.

Convert PNG images to JPG format.

Convert PNG images to modern WebP format.

Crop to an official size and lay out a print sheet.

Turn a photo into blocky, limited-palette pixel art.

Generate sized placeholder images for mockups.

A clean square or circular avatar, ready to upload.

Generate a QR code from any text or URL.

Build the search links for an image on every major engine.

Round the corners of an image, with a transparent outside.

Rasterise SVG at any scale, or wrap an image as SVG.

Straighten and whiten a photographed document.

Crop to a fixed ratio, or to a circle, hexagon, triangle or star.

Bring back detail with unsharp masking.

Turn a photo of your signature into a transparent PNG.

Export one image at the right size for every platform.

Pack frames into one sheet, with the CSS positions.

Small, right-sized copies, with an optional caption.

Convert between PNG, JPG, WebP, AVIF, BMP, TIFF, GIF and ICO.

Convert WebP images to PNG format.

Re-encode images to WebP or AVIF for much smaller files.

Draw short words as large block letters.

Convert text to character codes in decimal or octal.

Wrap text to a set width, or break it after a chosen character.

Number every line, with your own separator.

Wrap every line with text of your choice.

Encode text to Base64, or decode it back.

Convert text to binary and binary back to text.

Bold, italic, script, fraktur and monospace text you can paste anywhere.

Turn letters into circled or squared characters.

Capitalize the first letter of every word, leaving acronyms intact.

Convert text between upper, lower, title and sentence case.

Count characters with and without spaces.

Pull a single column out of CSV or other delimited text.

Find the lines two lists share, or the ones only one has.

Remove duplicate lines from a block of text.

Pull every email address out of a block of text.

Turn text into every Unicode style at once — bold, script, bubble and more.

Replace text across a whole document, with optional regex.

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

Turn HTML back into readable Markdown.

Turn a topic or caption into ready-to-post hashtags.

Score a headline on length, numbers and power words.

Convert text to hexadecimal and hex back to text.

See which words dominate your text, and by how much.

Count total, empty, unique and longest lines.

Generate placeholder Lorem Ipsum paragraphs.

Turn any text into lowercase.

Turn Markdown into clean, safe HTML.

Translate text to Morse code and back.

Pull every number out of text, with a running total.

Spell any number out in English words.

Check whether a word or phrase reads the same backwards.

Find phone numbers in any block of text.

Generate fake rows for testing, as JSON, CSV or SQL.

Shift letters by any amount — ROT13 by default.

Generate random strings, passwords and keys.

Generate random strings of a chosen length.

Generate random words or names for names, tests and games.

Score your writing with Flesch, Flesch-Kincaid and Gunning Fog.

Delete blank lines from a list or a document.

Collapse repeated spaces and tabs down to one.

Join wrapped lines back into flowing paragraphs.

Strip chosen characters, all punctuation, or all digits.

Convert between numbers and Roman numerals, both ways.

Count sentences and paragraphs, with averages for each.

Put a list of lines into random order.

Collapse text into one line, or split one line back out.

Small caps, superscript and subscript text.

Add a strike, underline or overline that survives copy and paste.

Catch repeated words, spacing slips and sentences that run too long.

Full statistics for any text in one pass.

Extract everything sitting between two markers.

Every tidy-up in one pass — spacing, blank lines, HTML, smart quotes.

Compare two texts and see exactly what changed.

Repeat text as many times as you need.

Reverse text by characters, words, or lines.

Sort lines of text alphabetically, ascending or descending.

Shorten long text by keeping only its most important sentences.

Strip spaces from the start, the end, or both ends of every line.

Decode percent-encoded URL text.

Percent-encode text for safe use in URLs.

Pull every link out of text or pasted HTML.

Move between readable text, \uXXXX escapes and UTF-8 bytes.

Turn any text into UPPERCASE.

Flip text upside down for bios and posts.

Generate available-looking usernames and handles.

Count words, characters, sentences, paragraphs and reading time.

Turn a number written in words back into digits.

Create the corrupted, glitchy Zalgo look.

AES-256-GCM encryption with a passphrase.

The ASCII table, plus details for any character you paste.

Encode and decode Base32 and Base58.

Decode Base64 back to text.

Encode text to Base64.

Build a CSS box-shadow with live values.

Convert between KB, MB, GB, TB and their KiB counterparts.

CRC32 and Adler-32 checksums for text or a file.

Re-indent minified CSS into something readable.

Build linear, radial and conic CSS gradients.

Minify CSS by stripping comments and whitespace.

Convert between px, rem, em, %, pt and physical units.

Catch unbalanced braces and broken declarations.

Convert a colour between HEX, RGB, HSL, HSV and CMYK.

Build a database URL with the password escaped correctly.

Check colour contrast against the WCAG thresholds.

Check a card number's Luhn checksum and identify the issuer.

Explain a cron expression and list its next runs.

Build CSS easing curves, or start from a preset.

Escape text for JavaScript, JSON, SQL, HTML, shell and more.

Hash a file and compare it against a published checksum.

Generate CSS Flexbox or Grid layout rules.

Compress or expand text with GZIP or Deflate.

Sign a message with a secret key using HMAC.

Every common HTML entity with its character and code.

Pretty-print and indent HTML.

Shrink HTML without breaking pre or textarea content.

Find unclosed tags, bad nesting and missing alt text.

Every HTTP status code, with notes on when to use it.

MD5, SHA-1, SHA-256, SHA-512 and more, from any text.

See the exact bits behind a floating-point number.

Basic JavaScript minifier (removes comments and extra whitespace).

Compare two JSON documents by value, not by text.

Pretty-print and indent JSON.

Minify JSON by removing whitespace.

Validate JSON and report syntax errors.

Flatten JSON into one searchable path per value.

Convert JSON to CSV or TSV, and CSV back to JSON.

Turn a JSON sample into TypeScript, Python or Go models.

Convert JSON to XML and XML back to JSON.

Convert JSON to YAML and YAML back to JSON.

Query JSON with a dotted path and see what it returns.

Read a JWT's header, payload and expiry.

Sign a JSON payload into a JWT with HMAC.

Re-indent minified JavaScript or TypeScript.

Hide string literals and strip comments from JavaScript.

Check brackets, quotes and comments before you debug.

Find the MIME type for any file extension.

Turn CSV or TSV rows into an aligned Markdown table.

Generate CREATE TABLE and INSERT statements from a JSON sample.

Generate strong random passwords.

Generate a project README with the usual sections.

Every regex token explained, with ready-made patterns.

Test a regular expression and see every match and group.

Build a responsive img tag with srcset and sizes.

Break a long SQL statement onto readable lines.

Strip comments and whitespace from an SQL statement.

Strip the editor metadata that bloats an exported SVG.

CIDR maths for IPv4 and IPv6 networks.

Convert between TOML, INI and JSON.

Generate one or more random UUID v4 values.

Convert Unix timestamps to dates and back.

Read the browser, OS and device out of a User-Agent string.

Pretty-print or minify XML, and catch syntax errors.

Turn a cURL command into JavaScript, Python, Go or PHP.

Build a .gitignore for the stacks you actually use.

Generate an Apache or nginx .htpasswd line.