All tools
Free handy online tools.
Calculator6
Percentage CalculatorFour percentage calculations in one: percent of a number, X is what percent of Y, increase/decrease, and percent change. Fast and 100% in your browser.Triangle SolverEnter three sides, two sides and the included angle, or two angles and a side to find the remaining sides, angles, area and perimeter. Runs in your browser.Ratio CalculatorSolve A:B = C:D for the missing value, simplify ratios to lowest terms, and view them as decimals — all in your browser.Quadratic Equation SolverSolve ax² + bx + c = 0 — get the roots (real or complex), the discriminant, and the vertex, in your browser.Standard Deviation CalculatorPaste numbers to get the mean, variance and standard deviation — both population and sample — with min, max and range, in your browser.Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers, with the result simplified and shown as a mixed number and decimal. Runs in your browser.
Converter3
Unit ConverterConvert length, weight, temperature, volume, area, speed, data, and time between metric and imperial units — instantly in your browser.Cooking Measurement ConverterConvert between cups, tablespoons, teaspoons, ml and fluid ounces, and turn volumes into grams for flour, sugar, butter and more by ingredient density. In your browser.Number Base ConverterConvert a number between binary, octal, decimal and hexadecimal at once, with grouped bits and one-click copy. Handles very large numbers, entirely in your browser.
Text16
Character CounterCount characters with and without spaces, plus words, lines, paragraphs and bytes — in real time.YouTube Title AnalyzerScore your YouTube title instantly — length, preview, numbers, power words and more. See where it gets cut off on mobile and desktop. Free, browser-only.Password GeneratorGenerate strong random passwords or easy-to-remember passphrases with crypto randomness. Exclude ambiguous characters, guarantee at least one of each type. Runs in your browser — nothing is uploaded.Text Diff CheckerCompare two texts and highlight what was added and removed, line by line, with change counts. Runs in your browser — nothing uploaded.Lorem Ipsum GeneratorGenerate Lorem Ipsum placeholder text by words, sentences or paragraphs, with a classic start and optional HTML output. Copy with one click. In your browser.Text ReverserReverse text by characters, words, or lines. Handles emoji safely and runs entirely in your browser — nothing uploaded.Unicode Font StylerTurn plain text into bold, italic, script, monospace, double-struck, circled and fullwidth Unicode characters you can paste anywhere — in your browser.Social Media Character CounterCount characters as you type and see how much room is left on X, Instagram, Threads, Bluesky, Mastodon, LinkedIn and more — in your browser.Manuscript Paper CounterPaste text to see how many 400- or 200-character Japanese manuscript sheets (genkou youshi) it fills, plus character counts. Runs in your browser.Reading Time CalculatorPaste text to estimate how long it takes to read or read aloud, with slow/average/fast speeds and word and character counts. Runs in your browser.Romaji ConverterTurn Japanese hiragana and katakana into Hepburn romaji, handling long vowels, double consonants and syllabic n. Useful for names on forms. In your browser.Whitespace CleanerTrim lines, collapse multiple spaces, remove blank or trailing whitespace and convert tabs — clean up messy pasted text. In your browser, nothing uploaded.Find and ReplaceReplace text in bulk with plain text or regular expressions, with case-insensitive and whole-word options and a match count. Runs entirely in your browser.Full-width / Half-width ConverterSwitch Japanese text between full-width (zenkaku) and half-width (hankaku) for letters, numbers, symbols, spaces and katakana. In your browser, nothing uploaded.Text Case ConverterInstantly switch text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more — all at once. In your browser, nothing uploaded.Duplicate Line RemoverRemove duplicate lines from text, plus sort, trim whitespace, drop empty lines and ignore case to clean up any list — all in your browser, nothing uploaded.
Image54
Image CompressorCompress JPG, PNG and WebP right in your browser — no upload. Adjust quality and see the before/after size and % saved.QR Code GeneratorCreate a custom QR code with your logo, brand colors and dot/eye styles — in your browser. Download crisp SVG or PNG. No watermark, no sign-up, nothing uploaded.Image ResizerResize and crop images to an exact size or social-media preset in your browser, with aspect-ratio lock and PNG/JPG/WebP export — nothing uploaded.EXIF Viewer & RemoverView a photo's EXIF metadata — date, camera and GPS location — then strip all metadata and download a clean copy. Runs in your browser, never uploaded.Rotate & Flip ImageTurn photos 90°, mirror horizontally or vertically, and download — all in your browser. Your image is never uploaded.Image to ASCII ArtTurn a photo into text art with adjustable width and inversion, then copy it. Runs entirely in your browser — your image is never uploaded.Image Grayscale & FilterApply grayscale, sepia, or invert to a photo with an adjustable strength slider, then download. Runs entirely in your browser — never uploaded.Image WatermarkAdd a text watermark to a photo — tiled or in a corner, with adjustable opacity, size and color — entirely in your browser, no upload.Square Image MakerFit any photo into a square with padding instead of cropping — choose the background color, padding and size for Instagram and other social posts. In your browser.Blur & Mosaic ImageDrag to select faces, names or info in an image and hide them with a mosaic or blur, then download. All in your browser — your photo never leaves your device.Favicon GeneratorUpload an image and generate every favicon size (16–512) plus the HTML and manifest snippet to add them. Canvas-based, nothing uploaded — all in your browser.PNG → JPGConvert PNG images to JPG in your browser — no upload, free and instant.PNG → WEBPConvert PNG images to WEBP in your browser — no upload, free and instant.PNG → BMPConvert PNG images to BMP in your browser — no upload, free and instant.PNG → ICOConvert PNG images to ICO in your browser — no upload, free and instant.JPG → PNGConvert JPG images to PNG in your browser — no upload, free and instant.JPG → WEBPConvert JPG images to WEBP in your browser — no upload, free and instant.JPG → BMPConvert JPG images to BMP in your browser — no upload, free and instant.JPG → ICOConvert JPG images to ICO in your browser — no upload, free and instant.WEBP → PNGConvert WEBP images to PNG in your browser — no upload, free and instant.WEBP → JPGConvert WEBP images to JPG in your browser — no upload, free and instant.WEBP → BMPConvert WEBP images to BMP in your browser — no upload, free and instant.WEBP → ICOConvert WEBP images to ICO in your browser — no upload, free and instant.GIF → PNGConvert GIF images to PNG in your browser — no upload, free and instant.GIF → JPGConvert GIF images to JPG in your browser — no upload, free and instant.GIF → WEBPConvert GIF images to WEBP in your browser — no upload, free and instant.GIF → BMPConvert GIF images to BMP in your browser — no upload, free and instant.GIF → ICOConvert GIF images to ICO in your browser — no upload, free and instant.BMP → PNGConvert BMP images to PNG in your browser — no upload, free and instant.BMP → JPGConvert BMP images to JPG in your browser — no upload, free and instant.BMP → WEBPConvert BMP images to WEBP in your browser — no upload, free and instant.BMP → ICOConvert BMP images to ICO in your browser — no upload, free and instant.SVG → PNGConvert SVG images to PNG in your browser — no upload, free and instant.SVG → JPGConvert SVG images to JPG in your browser — no upload, free and instant.SVG → WEBPConvert SVG images to WEBP in your browser — no upload, free and instant.SVG → BMPConvert SVG images to BMP in your browser — no upload, free and instant.SVG → ICOConvert SVG images to ICO in your browser — no upload, free and instant.AVIF → PNGConvert AVIF images to PNG in your browser — no upload, free and instant.AVIF → JPGConvert AVIF images to JPG in your browser — no upload, free and instant.AVIF → WEBPConvert AVIF images to WEBP in your browser — no upload, free and instant.AVIF → BMPConvert AVIF images to BMP in your browser — no upload, free and instant.AVIF → ICOConvert AVIF images to ICO in your browser — no upload, free and instant.ICO → PNGConvert ICO images to PNG in your browser — no upload, free and instant.ICO → JPGConvert ICO images to JPG in your browser — no upload, free and instant.ICO → WEBPConvert ICO images to WEBP in your browser — no upload, free and instant.ICO → BMPConvert ICO images to BMP in your browser — no upload, free and instant.Convert PNG filesFree PNG converter that runs in your browser — your file is never uploaded. Convert PNG to other formats with no install and no sign-up.Convert JPG filesFree JPG converter that runs in your browser — your file is never uploaded. Convert JPG to other formats with no install and no sign-up.Convert WebP filesFree WebP converter that runs in your browser — your file is never uploaded. Convert WEBP to other formats with no install and no sign-up.Convert GIF filesFree GIF converter that runs in your browser — your file is never uploaded. Convert GIF to other formats with no install and no sign-up.Convert BMP filesFree BMP converter that runs in your browser — your file is never uploaded. Convert BMP to other formats with no install and no sign-up.Convert SVG filesFree SVG converter that runs in your browser — your file is never uploaded. Convert SVG to other formats with no install and no sign-up.Convert AVIF filesFree AVIF converter that runs in your browser — your file is never uploaded. Convert AVIF to other formats with no install and no sign-up.Convert ICO filesFree ICO converter that runs in your browser — your file is never uploaded. Convert ICO to other formats with no install and no sign-up.
PDF & Documents5
PDF to Image ConverterConvert PDF pages to JPG & PNG in your browser — no upload. See thumbnails, pick pages, choose resolution and format, then download each page as an image.Image to PDFCombine multiple JPG, PNG or WebP images into one PDF in your browser — no upload. Reorder, set page size, orientation and margins, then download.Merge PDFCombine multiple PDF files into one in your browser — reorder, remove files you don't need, and download a single PDF. Nothing is uploaded.Rotate & Reorder PDF PagesTurn PDF pages 90°, move them up or down to reorder, and save a new PDF — entirely in your browser. Your PDF is never uploaded.Split PDF (Extract Pages)Extract specific pages or ranges (like 1-3, 5, 8-10) from a PDF into a new file, entirely in your browser. Your PDF is never uploaded.
Data6
CSV to Markdown TableConvert CSV to a clean Markdown table and back, with delimiter and alignment options and quoted-field handling. Runs in your browser, nothing uploaded.Text to TablePaste messy delimited or space-separated text and get a clean aligned table, CSV, TSV or Markdown — with the delimiter detected automatically. In your browser.Statistics CalculatorPaste numbers to get the mean, median, mode, range, variance, standard deviation and quartiles at once. Runs entirely in your browser.SQL FormatterPaste a messy one-line query and get clean, indented SQL with keywords aligned and uppercased. Runs entirely in your browser — your SQL is never uploaded.JSON to CSV ConverterConvert a JSON array of objects to CSV for Excel or Sheets, and turn CSV back into JSON — with correct quoting and a delimiter you choose. All in your browser.JSON to YAML ConverterConvert JSON to YAML and YAML back to JSON instantly in your browser. Keeps nested objects, arrays and types intact — great for Kubernetes, CI and app configs. Nothing uploaded.
Developer Tools19
JSON FormatterBeautify, minify and validate JSON in your browser. Broken JSON? See exactly which line and column is wrong, with the spot highlighted.Base64 Encode / DecodeEncode text to Base64 or decode Base64 to text instantly — UTF-8 safe (Japanese & emoji work), URL-safe Base64, image to data URL with preview. All in your browser.Regex TesterTest regular expressions with live match highlighting, capture groups, flags and a replace preview — runs in your browser, nothing uploaded.JSON to TypeScriptPaste JSON and instantly get clean TypeScript interfaces or types — nested objects, merged arrays, optional and nullable fields. Runs in your browser.UUID GeneratorGenerate version 4 UUIDs (GUIDs) or ULIDs in bulk with secure randomness and formatting options. Copy with one click. Runs in your browser.JSON Path ExtractorPaste JSON and a path like users[0].name to pull out the exact value or sub-object. Dot and bracket notation, all in your browser.Slug GeneratorTurn any title into a clean, URL-friendly slug — accents removed, spaces hyphenated, ASCII or Unicode — right in your browser.Color Format ConverterConvert a color to HEX, RGB, HSL, HSV, and CMYK, and copy ready-to-paste code for CSS, SwiftUI, Android, and Flutter — in your browser.Naming Case ConverterConvert an identifier between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case and more at once — in your browser.JSON Diff ViewerCompare two JSON documents key by key and see what was added, removed, or changed, with before/after values — in your browser.CSS Unit ConverterConvert between px, rem, em, pt and % for CSS, with adjustable root and base font sizes — in your browser.Cron Expression BuilderBuild a cron expression with simple dropdowns — no syntax to memorize — with presets, and copy it, in your browser.Cron Expression ParserEnter a 5-field cron schedule to see each field broken down and the next run times. Validates and previews crontab entries in your browser.Password Strength CheckerSee an entropy score, estimated crack time and weaknesses for your password — checked entirely in your browser. Nothing is sent or stored.HTML Entity Encoder / DecoderEscape <, >, &, quotes and non-ASCII characters to HTML entities, or decode named and numeric entities back to text. Runs in your browser.Flexbox PlaygroundToggle flex-direction, justify-content, align-items, wrap and gap with a live preview, then copy the CSS. A fast way to learn and build flex layouts. In your browser.CSS clamp() GeneratorTurn a min and max size plus viewport range into a fluid CSS clamp() value for responsive typography and spacing, with a live preview. Runs in your browser.JWT DecoderPaste a JSON Web Token to read its header and payload, with human-readable expiry and issued-at times. Decoded in your browser — your token is never sent anywhere.URL Encoder / DecoderPercent-encode or decode text and full URLs, switch between component and full-URL modes, and break a query string into key/value pairs. All in your browser.
AI Tools2
Token CounterCount GPT-4o, GPT-4 and GPT-3.5 tokens accurately with a real tokenizer. Visualize token splits in color. Runs in your browser — nothing is uploaded.Prompt Template BuilderBuild reusable AI prompt templates with {{variables}}, fill in the values and copy a finished prompt for ChatGPT, Claude or any LLM. No AI calls, all in your browser.
Design11
Color ConverterConvert any color between HEX, RGB, HSL, HSV and RGBA at once. Edit any value, copy with one click, with alpha and WCAG contrast.Color Palette GeneratorGenerate harmonious color palettes from a base HEX using complementary, analogous, triadic and more schemes. Lock colors, reshuffle the rest, and export to CSS variables, Tailwind or JSON.Gradient GeneratorCreate linear, radial and conic CSS gradients with multiple color stops. Adjust angle, shape and center, then copy the background CSS or Tailwind value in one click.Image Color ExtractorExtract the dominant color palette from any image in your browser — no upload. Get HEX, RGB and share % of each color, choose how many colors, copy or export as CSS/JSON.Font Pairing ToolFind curated Google Fonts heading × body pairings, preview them live, and copy the CSS in one click.Box Shadow GeneratorCreate CSS box-shadows with a live preview. Adjust offset, blur, spread, color and opacity, stack multiple layers, toggle inset shadows, start from presets, and copy the CSS or Tailwind value in one click.Color Contrast CheckerCheck the WCAG contrast ratio between text and background, with AA/AAA results, a live preview and a suggested passing color. Runs in your browser.Color Palette Image ExporterAdd your hex colors and download a clean swatch image (PNG) with hex labels — perfect for sharing or Figma. Runs in your browser.Palette to CSS VariablesPaste hex colors and get CSS custom properties, SCSS variables, or a Tailwind color config — generated in your browser.OGP Image GeneratorCreate a social share (OGP) image with your title, subtitle, theme and size, then download a PNG — entirely in your browser.Cubic Bezier GeneratorDrag the handles to craft a custom CSS easing curve, preview the motion and copy the cubic-bezier() and transition code. Runs in your browser.
Media55
Text to SpeechRead any text aloud in your browser with a choice of voices, speed and pitch. No upload, no sign-up — the speech is generated on your device.Online MetronomeKeep a steady beat at any BPM with accurate Web Audio timing, time signatures, accented downbeats and tap tempo. Runs in your browser.MP3 → WAVConvert MP3 audio to WAV in your browser — no upload, free.MP3 → OGGConvert MP3 audio to OGG in your browser — no upload, free.WAV → MP3Convert WAV audio to MP3 in your browser — no upload, free.WAV → OGGConvert WAV audio to OGG in your browser — no upload, free.OGG → WAVConvert OGG audio to WAV in your browser — no upload, free.OGG → MP3Convert OGG audio to MP3 in your browser — no upload, free.M4A → WAVConvert M4A audio to WAV in your browser — no upload, free.M4A → MP3Convert M4A audio to MP3 in your browser — no upload, free.M4A → OGGConvert M4A audio to OGG in your browser — no upload, free.AAC → WAVConvert AAC audio to WAV in your browser — no upload, free.AAC → MP3Convert AAC audio to MP3 in your browser — no upload, free.AAC → OGGConvert AAC audio to OGG in your browser — no upload, free.OPUS → WAVConvert OPUS audio to WAV in your browser — no upload, free.OPUS → MP3Convert OPUS audio to MP3 in your browser — no upload, free.OPUS → OGGConvert OPUS audio to OGG in your browser — no upload, free.FLAC → WAVConvert FLAC audio to WAV in your browser — no upload, free.FLAC → MP3Convert FLAC audio to MP3 in your browser — no upload, free.FLAC → OGGConvert FLAC audio to OGG in your browser — no upload, free.MP4 → WEBMConvert MP4 video to WEBM in your browser — no upload, free.MP4 → MP3Convert MP4 video to MP3 in your browser — no upload, free.MP4 → WAVConvert MP4 video to WAV in your browser — no upload, free.MP4 → GIFConvert MP4 video to GIF in your browser — no upload, free.WEBM → MP4Convert WEBM video to MP4 in your browser — no upload, free.WEBM → MP3Convert WEBM video to MP3 in your browser — no upload, free.WEBM → WAVConvert WEBM video to WAV in your browser — no upload, free.WEBM → GIFConvert WEBM video to GIF in your browser — no upload, free.MOV → MP4Convert MOV video to MP4 in your browser — no upload, free.MOV → WEBMConvert MOV video to WEBM in your browser — no upload, free.MOV → MP3Convert MOV video to MP3 in your browser — no upload, free.MOV → WAVConvert MOV video to WAV in your browser — no upload, free.MOV → GIFConvert MOV video to GIF in your browser — no upload, free.MKV → MP4Convert MKV video to MP4 in your browser — no upload, free.MKV → WEBMConvert MKV video to WEBM in your browser — no upload, free.MKV → MP3Convert MKV video to MP3 in your browser — no upload, free.MKV → WAVConvert MKV video to WAV in your browser — no upload, free.MKV → GIFConvert MKV video to GIF in your browser — no upload, free.AVI → MP4Convert AVI video to MP4 in your browser — no upload, free.AVI → WEBMConvert AVI video to WEBM in your browser — no upload, free.AVI → MP3Convert AVI video to MP3 in your browser — no upload, free.AVI → WAVConvert AVI video to WAV in your browser — no upload, free.AVI → GIFConvert AVI video to GIF in your browser — no upload, free.Convert MP3 filesFree MP3 converter that runs in your browser — your file is never uploaded. Convert MP3 to other formats with no install and no sign-up.Convert WAV filesFree WAV converter that runs in your browser — your file is never uploaded. Convert WAV to other formats with no install and no sign-up.Convert OGG filesFree OGG converter that runs in your browser — your file is never uploaded. Convert OGG to other formats with no install and no sign-up.Convert M4A filesFree M4A converter that runs in your browser — your file is never uploaded. Convert M4A to other formats with no install and no sign-up.Convert AAC filesFree AAC converter that runs in your browser — your file is never uploaded. Convert AAC to other formats with no install and no sign-up.Convert Opus filesFree Opus converter that runs in your browser — your file is never uploaded. Convert OPUS to other formats with no install and no sign-up.Convert FLAC filesFree FLAC converter that runs in your browser — your file is never uploaded. Convert FLAC to other formats with no install and no sign-up.Convert MP4 filesFree MP4 converter that runs in your browser — your file is never uploaded. Convert MP4 to other formats with no install and no sign-up.Convert WebM filesFree WebM converter that runs in your browser — your file is never uploaded. Convert WEBM to other formats with no install and no sign-up.Convert MOV filesFree MOV converter that runs in your browser — your file is never uploaded. Convert MOV to other formats with no install and no sign-up.Convert MKV filesFree MKV converter that runs in your browser — your file is never uploaded. Convert MKV to other formats with no install and no sign-up.Convert AVI filesFree AVI converter that runs in your browser — your file is never uploaded. Convert AVI to other formats with no install and no sign-up.
Date & Time7
Unix Timestamp ConverterConvert Unix timestamps to dates and back. Auto-detects seconds/milliseconds, shows UTC/local/any timezone, ISO 8601/RFC 2822/relative time. Nothing is sent.Age CalculatorFind your exact age in years, months and days from your date of birth, plus total days, next birthday, the day of the week you were born and your zodiac signs.Date Difference CalculatorCount the days, weeks and business days between two dates, or find the date a number of days or business days from a start date. In your browser.Time Zone Meeting PlannerSee multiple cities' local times side by side across the day, with good meeting hours highlighted to find a slot that works for everyone. In your browser.Stopwatch & Lap TimerA precise online stopwatch with lap and split times and fastest/slowest highlighting. No install, no sign-up — runs in your browser.Japanese Era ConverterConvert between the Western (Gregorian) calendar and Japanese eras — Reiwa, Heisei, Showa, Taisho and Meiji — taking era start dates into account. In your browser.Pomodoro TimerWork in focused 25-minute sessions with automatic short and long breaks, track completed Pomodoros and customize durations. Runs in your browser.
Money11
Savings Goal CalculatorPlan your savings with compound interest. Enter a monthly amount to see future value, or set a goal to find how much to save each month. Visual growth chart, inflation-adjusted real value — free and 100% private.Discount CalculatorCalculate the final price after percent-off and fixed discounts, stack a coupon, add or remove tax, and see how much you save — all in your browser.Tax CalculatorAdd or remove VAT and sales tax: enter a price and rate to get the net, tax and gross amounts, with presets and rounding. Runs in your browser.Manual Currency ConverterConvert money using a rate you type in — no live data, optional fee markup, works offline in your browser.Fuel Cost CalculatorEstimate how much fuel a trip uses and what it will cost, from distance, fuel economy (km/L, L/100km, MPG), and price — in your browser.Credit Card Payoff CalculatorSee how many months it takes to clear a credit card balance and how much interest you will pay, from balance, APR, and monthly payment — in your browser.Unit Price ComparatorCompare products by price per unit to see which is the better deal, even with different pack sizes — in your browser.Loan CalculatorEnter the amount, interest rate and term to see the monthly payment, total repaid and total interest, with a balance chart. An estimate, not financial advice.Salary ConverterConvert pay between hourly, daily, weekly, monthly and annual, with adjustable hours and weeks worked. See every figure at once in your browser.Tip Calculator & Bill SplitterAdd a tip percentage, split the total between any number of people, and optionally round up — see the tip, total and amount per person instantly. In your browser.Compound Interest CalculatorSee how savings grow with compounding and monthly contributions: future value, total interest and a year-by-year breakdown. An estimate, not financial advice.
Health7
Calorie CalculatorEstimate your BMR, TDEE and a daily calorie target for losing, maintaining or gaining weight, plus a protein/fat/carb breakdown. In your browser; an estimate, not medical advice.Running Pace CalculatorFind your running pace and speed from distance and time, plus predicted 5K, 10K, half and full marathon times — in your browser.Alcohol Metabolism CalculatorEstimate your blood alcohol level (BAC) and roughly how long until it clears, using the Widmark formula — in your browser. Not medical or legal advice.Water Intake CalculatorEstimate how much water to drink per day from your weight, activity and climate, in milliliters, liters and cups. An estimate, not medical advice.Heart Rate Zone CalculatorGet your estimated max heart rate and five training zones from your age, with optional Karvonen method using resting heart rate. An estimate, not medical advice.Sleep Cycle CalculatorFind the best times to go to bed or wake up based on 90-minute sleep cycles, so you wake between cycles feeling refreshed. Runs in your browser.BMI CalculatorEnter your height and weight (metric or imperial) to get your body mass index, WHO category and a healthy weight range. An estimate, not medical advice. In your browser.
Fun & Games3
Life in WeeksVisualize your life as a grid of weeks. Enter your birthday to see days lived, life progress %, and your weeks grid. Free and 100% private.Spinner Wheel (Random Picker)Add your own options and spin a colorful wheel to pick a random winner — for raffles, decisions and games. Runs in your browser, no sign-up.Dice RollerRoll a d20, 2d6 or any dice notation like 4d8+2 online. See each die, the total and the min/max/average. Fair crypto randomness, right in your browser.