All 300+ tools

Convert environment-variable files into JSON, and back again.

Frame a photo with a solid border in any color and thickness.

Prefix every line with a number, in whatever style you need.

Find the date a set number of days, weeks or months away.

Stamp page numbers onto a PDF, positioned and styled how you like.

Wrap every line with text — quotes, commas, tags, bullets.

Stamp text across a photo — once, or tiled across the whole thing.

Stamp DRAFT, CONFIDENTIAL or any text across every page.

Exact age in years, months, days — and every other unit going.

Cut a subject out of any background with a real segmentation model — running on your own device, not a server.

Strip the giveaways from AI-written text: em dashes, curly quotes, hidden characters and the phrases models overuse.

Measure the stylistic markers associated with AI writing — dash density, sentence uniformity, overused phrases. Not a detector.

Turn text into mocking, alternating capitals.

Convert degrees, radians, gradians and turns.

Area and perimeter for rectangles, circles, triangles and more.

Convert square meters, feet, acres, hectares and more.

Scale dimensions while keeping the same proportions.

Mirror the alphabet — A becomes Z, B becomes Y. Its own inverse.

Inspect duration, sample rate, channels and peak levels of an audio file.

Convert MP3, M4A, OGG, FLAC and more into uncompressed WAV.

Cut a section out of an audio file and export it as WAV.

Mean, median, mode, range and totals from a pasted list of numbers.

Click a background color to erase it, with tolerance and edge feathering you control.

Decode Base32 back to text, ignoring padding, spaces and case.

Encode text as Base32 — the encoding used for TOTP secrets and case-insensitive identifiers.

Decode Base64 back to readable text, URL-safe input included.

Encode text to Base64, with a URL-safe option.

Resize, compress and convert dozens of images at once, then download them as a ZIP.

AND, OR, XOR, NOT and shifts on two numbers, shown in every base.

Turn a color photo black and white — grayscale, high contrast or true 1-bit.

Soften an image, or blur it heavily to obscure something.

Body mass index in metric or imperial, with the standard categories.

Estimate body fat percentage using the US Navy tape method.

Tap along to a track to find its tempo in beats per minute.

How many units you need to sell before you start making money.

Fix a photo that came out too dark, too bright or too flat.

Shift every letter by a chosen amount to encode or decode a message.

Daily calorie needs from your BMR and activity level.

Turn any phrase into camelCase for variables and keys.

Put a capital letter at the start of every single word.

Work out car finance payments including trade-in, deposit and sales tax.

Count characters with and without spaces, plus limits for common platforms.

Count how often each character appears — handy for puzzles and ciphers.

Turn a copied chat conversation into clean markdown, JSON messages, or a plain transcript.

Crop a photo into a perfect circle with a transparent background.

Flip a virtual coin — once, or a thousand times.

Check text and background contrast against the WCAG accessibility standards.

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

Blend two colors and see every step between them.

Find the closest named CSS color to any hex code.

Build harmonious palettes from one base color.

Pick a color with sliders and read it back in every format at once.

See how savings grow with regular contributions and compounding.

Shrink a heavy PDF by re-rendering its pages at a lower resolution.

Turn any phrase into SCREAMING_SNAKE_CASE for constants and env vars.

Turn any image your browser can open — PNG, WEBP, AVIF, GIF, BMP, SVG — into a JPG.

Convert cups, tablespoons, teaspoons, milliliters and fluid ounces.

See how long a card balance takes to clear, and what paying more would save.

Explain a cron schedule in plain English and preview the next run times.

Shape corners individually and copy the border-radius CSS.

Dial in a box shadow visually and copy the CSS.

Generate a fluid clamp() that scales smoothly between two viewport widths — no media queries.

Design a linear or radial gradient and copy the CSS.

Strip comments and whitespace from CSS and see the saving.

Pull a single column out of CSV data as a clean list.

Swap between comma, semicolon, tab and pipe separated data.

Convert CSV or TSV into clean JSON, with the delimiter detected for you.

Turn CSV data into a Markdown table for READMEs, docs and issues.

Generate INSERT statements from CSV data, ready to paste into a client.

Paste a curl command and get the equivalent JavaScript fetch call.

Convert bytes, kilobytes, megabytes, gibibytes and the rest.

Convert Mbps, MB/s, Gbps and the rest — and stop confusing bits with bytes.

Count the days, weeks and months between two dates.

Remove unwanted pages and keep everything else.

Roll any number of dice with any number of sides, plus a modifier.

Work out a sale price, the saving, and stacked discounts.

Turn any phrase into dot.case for config keys and namespaces.

Map an image onto two colors for a bold editorial look.

Catch accidentally repeated words — the the, and and — that spellcheckers walk straight past.

Compare a draft with its rewrite and see exactly what changed, word by word.

What an appliance actually costs to run, per day, month and year.

Replace em dashes with commas, periods or plain hyphens — the fastest way to make AI text stop looking like AI text.

Strip emoji from text, including the multi-part sequences that other tools leave half-deleted.

Convert joules, calories, kilowatt-hours and BTU.

Pull every email address out of a block of text.

Pull every number out of text, and total them up.

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

Pull every link out of a block of text.

Turn plain text into bold, italic, script and monospace Unicode styles.

Generate every favicon size from one image, plus the HTML to drop in.

Verify a download by checking its MD5, SHA-1 and SHA-256 — without uploading it.

Swap text across your whole document, with optional regex.

Add, subtract, multiply and divide fractions, simplified automatically.

Convert hertz, kilohertz, megahertz, gigahertz and RPM.

Work out what a journey costs in fuel, and split it between passengers.

Convert MPG, liters per 100 km and kilometers per liter.

Greatest common divisor and lowest common multiple of any list of integers.

See how your title and description will look in search results.

Work out a weighted grade point average from your courses.

Turn a score into a percentage and a letter grade.

Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text.

Convert one hex code or a whole list into RGB values.

Turn hexadecimal bytes back into readable text, whatever separators they arrived with.

Sign a message with a secret key using HMAC-SHA256, 384 or 512.

Generate a valid, reciprocal set of hreflang tags for a page in several languages.

Turn HTML entities back into the characters they represent.

Escape characters so HTML renders them as text instead of markup.

Remove comments and collapse whitespace in HTML markup.

Paste an HTML table and get clean CSV, Markdown or JSON out of it.

Convert HTML back into tidy Markdown source.

Strip every tag and get just the readable text out of HTML.

Look up what any HTTP status code means and when to use it.

Shift every color around the wheel for instant recoloring.

Click anywhere on an image to read the exact color under your cursor.

Shrink JPG, PNG and WEBP file sizes with a quality slider you control.

Drag a crop box over your image, lock it to a ratio, and export the exact region.

Mirror an image horizontally, vertically or both.

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

Pull the dominant colors out of any photo as a ready-to-use palette.

Resize any image to exact pixels or a percentage, keeping it sharp.

Rotate a photo by 90° steps or any angle you choose.

Turn a photo into text art you can paste anywhere.

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

Extract text from a photo, screenshot or scan using optical character recognition.

Convert JPG or PNG to WEBP and cut file size by a third.

Turn JPGs and PNGs into a single PDF — one image per page.

See what an amount is worth after years of inflation, in both directions.

Swap every uppercase letter for lowercase and vice versa.

Flip every color to its opposite — a photographic negative.

Find the zero-width and look-alike characters hiding in pasted text — and strip them out.

Work out network, broadcast, mask and usable host range from CIDR notation.

Convert a JPG into a lossless PNG.

Compare two JSON documents by structure rather than by line, so formatting never shows up as a change.

Flatten deeply nested JSON into dot-notation keys, or expand it back.

Pretty-print, validate and tidy JSON with the indentation you prefer.

Strip every unnecessary space from JSON and see how much you saved.

Turn an array of JSON objects into a spreadsheet-ready CSV file.

Convert a JSON object into a URL query string, and back again.

Turn a JSON sample into TypeScript interfaces you can paste straight in.

Convert a JSON document into equivalent XML markup.

Convert JSON into readable YAML for configs and pipelines.

Check JSON for errors and get the exact line and column of the problem.

Decode a JSON Web Token to read its header and payload — locally, always.

Turn any phrase into kebab-case for URLs, CSS and file names.

See which words and phrases dominate your page copy.

Check whether a year is a leap year, and find the next few.

Turn plain text into 1337 5p34k.

Convert between meters, feet, inches, miles, kilometers and more.

Count total, non-empty, unique and duplicate lines in any list.

Turn a pasted list of lines into a JSON array — strings or numbers.

Work out what an API workload costs per call, per day and per month, at your own prices.

Estimate how many tokens a prompt will use, and how much of a context window it fills.

Monthly payment, total interest and payoff totals for any fixed-rate loan.

Generate placeholder text by the word, sentence or paragraph.

Convert any text to lowercase instantly.

Split a daily calorie target into protein, carbs and fat.

Pad any photo into a perfect square — no cropping, nothing lost.

Convert between cost, price, profit margin and markup.

Paste CSV, TSV or pasted spreadsheet cells and get an aligned markdown table.

Convert Markdown into clean HTML — headings, lists, links, tables and code.

Strip the markdown formatting out of AI output and leave clean, pasteable prose.

Produce the MD5 checksum of any text, instantly.

Add classic top and bottom caption text to any image.

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

Generate the complete set of SEO and social meta tags for a page.

Translate between plain text and Morse code, both directions.

Work out monthly repayments, total interest and the true cost of a mortgage.

Spell anything out as Alfa Bravo Charlie — for phone calls that keep going wrong.

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

Add thousands separators, fix decimal places, or convert between number formats used in different countries.

How much paint a room needs, allowing for coats, doors and windows.

Check whether a word or phrase reads the same backwards.

Turn any phrase into PascalCase for classes and components.

Generate memorable word-based passphrases that are still hard to crack.

Crop a headshot to official passport and ID dimensions at print resolution.

Generate strong random passwords using your browser’s secure randomness.

Inspect a PDF — page count, page sizes, metadata and whether it has text.

Read and rewrite a PDF’s title, author, subject and keywords.

Strip the color out of a PDF — cheaper to print, smaller to send.

Render each PDF page as a JPG or PNG at the resolution you choose.

Pull the text layer out of a PDF as a plain text file.

Every common percentage question, answered at once.

Measure growth or decline between two numbers.

Pixelate a photo to censor faces, plates and personal details.

Create sized placeholder images for mockups, with the dimensions written on.

Convert PNG to JPG, choosing what fills any transparent areas.

Reduce an image to a handful of color levels for a poster-print look.

Convert watts, kilowatts, horsepower and BTU per hour.

Crop by exact pixel coordinates or a fixed aspect ratio, without dragging.

Estimate a due date and see the current stage of pregnancy.

Convert bar, PSI, pascals, atmospheres and mmHg.

Check whether a number is prime and see its factorisation.

How large you can print an image before it looks soft.

Wrap prompt sections in XML-style tags, the structure models follow most reliably.

Fill {{variables}} in a prompt template from a list of values, and generate every version at once.

Create QR codes for links, text, Wi-Fi, contacts and more — no tracking, no expiry.

Solve ax² + bx + c = 0 with real or complex roots, shown step by step.

Break a URL into its parts and list every query parameter.

Generate random colors — completely random, or within a mood.

Generate random dates within a range — useful for test data.

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

Pick a winner — or several — from a list of names or options.

Generate random IDs, tokens and keys from an alphabet you choose.

Split a list of people into balanced random teams.

Simplify ratios, scale them up, and solve for a missing value.

Flesch reading ease, grade level and the numbers behind them.

Estimate how long your text takes to read at any reading speed.

Escape a literal string so it can be dropped into a regular expression safely.

Test a regular expression against sample text and see every match highlighted.

Convert accented characters to their plain ASCII equivalents.

Strip repeated lines from a list, keeping the order you had.

Delete blank lines, or collapse runs of them into one.

Collapse double spaces and trim the edges of every line.

Join wrapped text back into one flowing paragraph.

Strip punctuation and symbols, leaving letters, numbers and spaces.

Rebuild a PDF with the pages in exactly the order you specify.

Flip a PDF back to front — handy after a reverse-order scan.

Flip text backwards by character, word or line.

Convert RGB values into hex codes, one line at a time.

Pythagoras, angles, area and perimeter from any two sides.

Build a robots.txt file that says exactly what you mean.

Return on investment, plus the annualised rate over your holding period.

Convert numbers to Roman numerals and back again.

Apply the classic ROT13 letter rotation — run it twice to undo it.

Turn pages the right way up — all of them, or just the ones you pick.

Give an image soft rounded corners with a transparent background.

Convert between pace, speed and finish time for any distance.

Convert between hourly, daily, weekly, monthly and annual pay.

Add tax to a net price, or strip it back out of a gross price.

Generate JSON-LD structured data for rich search results.

Record your screen or a single window straight to a video file.

Draw Secret Santa pairings where nobody gets themselves.

Capitalize the first letter of every sentence and lowercase the rest.

Count sentences and see average sentence and word length.

Break a paragraph into one sentence per line — for subtitles, translation, or reading it back critically.

Give a photo a warm, aged sepia tone.

Produce a SHA-256 hash of any text using the browser’s own crypto.

Generate a full lightness ramp from any color — perfect for design tokens.

Bring back edge detail in a slightly soft photo.

Convert shoe sizes between UK, US, EU and centimeters.

Randomize the order of a list — draws, playlists, running orders.

Draw your signature and place it on any page of a PDF.

Interest calculated on the original amount only — no compounding.

Convert curly quotes, dashes and ellipses to plain ASCII — or back the other way.

Turn any phrase into snake_case for databases and Python.

Resize to the exact dimensions each platform wants, in one click.

Preview how a link will look when shared on social platforms.

Alphabetise or numerically sort any list of lines.

Work out how long a script takes to say out loud — for talks, videos and voiceovers.

Convert km/h, mph, knots, meters per second and Mach.

Break a PDF into separate files — one per page, or in fixed-size chunks.

Break a long SQL statement onto readable lines with consistent keywords.

Turn a pasted list into a ready-to-run SQL IN clause.

Population and sample standard deviation, variance and quartiles.

Add s̶t̶r̶i̶k̶e̶t̶h̶r̶o̶u̶g̶h̶ or underline that survives a copy-paste.

Escape or unescape text for JSON, JavaScript, CSV and shell arguments.

Remove EXIF data — GPS location, camera model, timestamps — by re-encoding.

Rasterize an SVG to a PNG at whatever size you need.

Assemble a structured system prompt from role, task, rules, format and refusal behavior.

Convert Celsius, Fahrenheit, Kelvin and Rankine.

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

Repeat any text as many times as you like.

Convert text into 8-bit binary, and binary back into text.

Show text as its hexadecimal bytes, in whichever layout you need.

Cut text to a character or word limit without chopping a word in half.

Work out how many tiles a floor or wall needs, including the wastage everyone forgets.

Convert seconds, minutes, hours, days, weeks and years.

Work out the time between two clock times, across midnight if needed.

Convert a time between any two zones, with daylight saving handled properly.

Work out the tip and split the bill between any number of people.

Capitalize headlines properly, leaving small words alone.

Play and download pure test tones at any frequency.

Write your own DuckyTools tool, watch it run, and download it as one self-contained HTML file.

Remove leading and trailing whitespace from every line.

Break text into code points and see what each character really is, byte for byte.

Convert between Unix timestamps and human-readable dates, both ways.

Convert any text to UPPERCASE instantly.

Flip text ʇxǝʇ using Unicode look-alikes.

Turn percent-encoded text back into readable characters.

Percent-encode text for safe use in URLs and query strings.

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

Read a user-agent string, or inspect your own browser’s.

Generate available-sounding usernames and handles.

Build tagged campaign URLs that analytics tools can actually read.

Generate cryptographically random version-4 UUIDs in bulk.

Check a video’s resolution, duration, aspect ratio and size.

Scrub through a video and save any frame as a PNG or JPG.

Record audio from your microphone and download it — nothing is uploaded.

Convert liters, gallons, pints, cubic meters and cups.

A daily hydration target based on weight, activity and climate.

Convert modern WEBP images into universally supported JPGs.

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

Drop any file to identify what it really is, then jump straight to a tool that can work on it — with the file already loaded.

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

See which words you use most, with counts and percentages.

Hard-wrap text to a fixed column width, with optional indent and hanging indent.

Count working days between two dates, excluding weekends and holidays.

Indent XML into a readable tree and check that it parses.

Turn a list of URLs into a valid XML sitemap.

Parse XML into a JSON structure, attributes included.

Convert YAML configuration into JSON.

Let a coin decide. Ask a question, get an answer.