All tools

74 free tools in 8 categories. Search by name or task, or browse a category.

Word CounterCount words, characters, sentences, paragraphs and lines as you type, with reading and speaking time. Free, private and no sign-up.
Character CounterCount characters with and without spaces, words, lines and UTF-8 bytes. Check text against meta title, SMS, X post or custom character limits.
Case ConverterConvert text to UPPERCASE, lowercase, Title Case, Sentence case, alternating or inverse case, with correct Turkish İ/ı rules. Free and private.
Slug GeneratorTurn a title into a clean URL slug: accents and letters like ß, ğ, ł or đ are transliterated, with stop-word removal, separator and length options.
Remove Duplicate LinesDelete repeated lines from a list while keeping the original order. Options to ignore case, trim spaces and drop empty lines. Runs in your browser.
Sort LinesSort lines A–Z or Z–A with language-aware order and natural number sorting, sort by length, reverse the order or shuffle randomly. Free and private.
Find and ReplaceFind and replace text in your browser: match case, whole words or regular expressions with $1 capture groups. Shows the match count and regex errors.
Text CleanerClean pasted text: remove extra spaces, line breaks, tabs, HTML tags and invisible zero-width characters, and turn curly quotes into straight ones.
Text DiffCompare two texts line by line or word by word and see what was added and removed, marked with colour and +/− signs. Runs entirely in your browser.
Word Frequency CounterFind the most frequent words in any text, with counts and percentages, stop-word filtering and a minimum word length. Copy the table as CSV.
Lorem Ipsum GeneratorGenerate lorem ipsum placeholder text by paragraphs, sentences or words, optionally starting with “Lorem ipsum dolor sit amet” or wrapped in <p> tags.
Line ToolsAdd a prefix or suffix to every line, number lines, wrap lines in quotes, join lines with a separator, or split text into lines by a delimiter.
JSON FormatterFormat JSON with 2 spaces, 4 spaces or tabs, minify it, or sort keys. Syntax errors show the exact line and column. Runs in your browser.
JSON ValidatorCheck whether JSON is valid. Errors show the line, column and the offending text, with hints for trailing commas, quotes and comments.
JSON to CSV ConverterConvert a JSON array of objects to CSV. Nested objects become dot-path columns; choose comma, semicolon or tab and download a .csv file.
CSV to JSON ConverterConvert CSV to JSON with a standards-compliant parser: quoted fields, line breaks in cells, delimiter detection and optional number detection.
JSON ⇄ YAML ConverterConvert JSON to YAML or YAML to JSON in your browser. Handles anchors and multi-document YAML, quotes ambiguous strings and shows error lines.
SQL FormatterFormat messy SQL into readable, indented queries for MySQL, PostgreSQL, SQL Server, SQLite, Oracle, BigQuery and more, or minify it to one line.
Markdown PreviewWrite Markdown and see the rendered result live, with GitHub tables, task lists and strikethrough. Copy the HTML or download an .html file.
Regex TesterTest JavaScript regular expressions live: highlighted matches, numbered and named capture groups, flags and a replacement preview. Runs locally.
Cron Expression ExplainerTranslate a cron expression into plain English and see its next 10 run times in your time zone or UTC. Supports ranges, steps, names and @macros.
URL Encoder / DecoderPercent-encode or decode URLs and query values with encodeURIComponent or encodeURI rules, UTF-8 support, + as space and clear errors.
URL ParserBreak a URL into protocol, host, port, path, query and fragment, list every query parameter decoded, then edit, add or remove them and copy.
Base64 Encoder / DecoderEncode text or files to Base64 and decode Base64 back to text or a downloadable file. UTF-8 safe, URL-safe variant, MIME line wrap. Runs locally.
HTML Entity Encoder / DecoderEscape & < > " ' as HTML entities, optionally convert accents and symbols to named or numeric references, or decode entities back to text.
JWT DecoderDecode a JSON Web Token locally: view the header and payload as formatted JSON, check exp, nbf and iat as readable dates, and see if it has expired.
UUID GeneratorGenerate up to 1,000 random UUID v4 or time-ordered UUID v7 values with secure randomness. Copy or download them, and validate any UUID's version.
Unix Timestamp ConverterConvert Unix timestamps in seconds, milliseconds, microseconds or nanoseconds to ISO 8601, RFC 2822 and local time, or a date to a timestamp.
Number Base ConverterConvert integers of any size between binary, octal, decimal, hexadecimal and any base from 2 to 36. Accepts 0x, 0b and 0o prefixes and negative numbers.
Text to Binary ConverterConvert text to binary, hexadecimal, decimal or octal UTF-8 bytes and decode bytes back to text. Shows byte counts and multibyte characters.
Password GeneratorGenerate strong random passwords from 4 to 128 characters with your choice of letters, digits and symbols. Uses your browser's secure random generator.
Password Strength CheckerCheck how strong a password is: entropy, common-password and pattern detection, a rough crack-time estimate and tips. Runs entirely in your browser.
Hash GeneratorCalculate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files up to 200 MB, in hex or Base64, and verify a checksum. Runs in your browser.
HMAC GeneratorCreate and verify HMAC-SHA256, HMAC-SHA384, HMAC-SHA512 and HMAC-SHA1 signatures with a text or hex key, output in hex or Base64. Runs in your browser.
Random Token GeneratorGenerate cryptographically secure random tokens and API-key-style secrets in hex, Base64, Base64URL or alphanumeric, with optional prefix and entropy shown.
Image CompressorCompress JPEG, PNG and WebP images in your browser with a quality slider, format choice and optional downscaling. See the size saved before you download.
Image ResizerResize JPEG, PNG and WebP images to exact pixel sizes or a percentage, with aspect-ratio lock, crop-to-fill or letterbox fit and common preset sizes.
Image ConverterConvert images between PNG, JPEG, WebP, BMP and (where your browser supports it) AVIF. Set quality and a background colour for transparency.
Image CropperCrop JPEG, PNG and WebP images by dragging a selection or typing exact pixel values, with 1:1, 4:3, 16:9, 3:2 and 9:16 presets. Full-resolution output.
Rotate and Flip ImageRotate images 90° left or right or 180°, mirror them horizontally or vertically, or straighten by any angle with a transparent or coloured background.
Image to Base64Convert an image to a Base64 data URL with ready HTML img and CSS background snippets, or paste Base64 to preview and download the image.
Favicon GeneratorCreate favicon.ico, 16–512 px PNG icons, an apple-touch-icon and a site.webmanifest from an image or a letter. Download all as ZIP with the HTML tags.
SVG to PNG ConverterConvert SVG code or files to sharp PNG images at any scale or width, with a transparent or coloured background. Optional WebP export. Runs in your browser.
QR Code GeneratorCreate QR codes for links, text, Wi-Fi logins, contact cards, email, phone and SMS. Set colours, size and error correction; download PNG or SVG.
UTM BuilderAdd utm_source, utm_medium, utm_campaign and other UTM tags to any link. Keeps existing parameters and #fragments, warns before overwriting, exports CSV.
Meta Tag PreviewPreview how a page title and meta description may look in search results on desktop and mobile, with pixel-width estimates, character counts and warnings.
Meta Tag GeneratorGenerate HTML head tags: title, meta description, canonical, robots, viewport, charset, theme-color, Open Graph and Twitter card. Escaped, ready to copy.
Open Graph PreviewPreview approximate large and small link cards from a title, description, image URL and domain. Checks the image's real size and ratio against 1200×630.
Robots.txt GeneratorCreate a robots.txt file: default policy, allow and disallow rules per user-agent, crawl-delay and sitemap URLs, with presets and path validation.
Keyword Density CheckerCount how often words and 2- or 3-word phrases appear in a text, with density percentages, stop-word filtering, a sortable table and a target keyword check.
Hreflang Tag GeneratorGenerate hreflang annotations for multilingual sites as HTML link tags, XML sitemap entries or an HTTP Link header, with language, region and URL checks.
FAQ Schema GeneratorTurn questions and answers into valid FAQPage JSON-LD structured data, safely escaped for a script tag. Add, reorder and remove pairs, then copy the code.
Color ConverterConvert colours between HEX, RGB, HSL, HWB, OKLCH and naive CMYK. Paste any CSS colour or use the picker, then copy each format. Runs in your browser.
Contrast CheckerCheck the WCAG 2.2 contrast ratio of text and background colours, see AA and AAA results for text and UI parts, and get the nearest passing colour.
CSS Gradient GeneratorBuild linear, radial and conic CSS gradients with 2 to 6 colour stops, set angle and positions, preview live and copy the background CSS.
Box Shadow GeneratorDesign CSS box shadows with several layers: offset, blur, spread, colour, opacity and inset. Preview on any background and copy the box-shadow CSS.
Color Palette GeneratorGenerate complementary, analogous, triadic, tetradic, split-complementary and shade palettes from one colour. Lock colours, then copy HEX, CSS or JSON.
PX to REM ConverterConvert px to rem or em and back with any root font size (default 16px). Includes a table of common sizes and converts px values in whole CSS snippets.
Aspect Ratio CalculatorFind the missing width or height for any aspect ratio, simplify dimensions such as 1920×1080 to 16:9, preview the shape and copy the CSS aspect-ratio rule.
Percentage CalculatorWork out X% of a number, what percent one number is of another, percentage increase or decrease, adding or removing a percent, and reverse percentages.
Age CalculatorFind your exact age in years, months and days on any date, with totals in months, weeks and days and a countdown to your next birthday and its weekday.
Date Difference CalculatorCount the days between two dates in years, months and days, total days, weeks and hours, plus Monday–Friday business days. Times and end date optional.
Date Add / Subtract CalculatorAdd or subtract years, months, weeks, days or business days to any date. Shows the resulting weekday and ISO date and explains month-end rules.
Unit ConverterConvert length, weight, temperature, area, volume, speed, time, data size, pressure, energy and fuel economy with exact factors. See every unit at once.
Loan CalculatorWork out the monthly payment, total interest and amortization schedule of a fixed-rate loan, see what extra payments save, and download a CSV.
Discount CalculatorFind the sale price and the amount saved for any percent off, stack a second discount, add sales tax after the discount, or work back to the original price.
VAT CalculatorAdd VAT or sales tax to a net price, or extract it from a gross price. Enter any rate and get net, tax and gross amounts rounded to the cent.
Compound Interest CalculatorSee how savings grow with compound interest: pick the compounding frequency, add monthly deposits, and get the final balance and a year-by-year table.
BMI CalculatorCalculate body mass index from height and weight in kg/cm or lb/ft/in, see the WHO adult category and the weight range that gives a BMI of 18.5 to 24.9.
Random Number GeneratorGenerate fair random numbers in any range, with or without repeats, pick random items from a list, flip a coin or roll dice, all with secure randomness.
Time Zone ConverterConvert a date and time from one time zone to many others, with correct daylight saving time, UTC offsets and zone abbreviations. Uses your browser's data.
Countdown Timer & StopwatchFree online countdown timer with an alarm sound and tab-title display, plus a stopwatch with lap times you can copy. Stays accurate in background tabs.
What Is My Screen ResolutionSee your screen resolution, viewport size, device pixel ratio, colour depth, touch support, colour scheme and user agent. Read locally, nothing stored.
HTTP Status CodesSearchable list of all HTTP status codes from 100 to 511 with plain-English meanings and when they occur, plus common nginx and Cloudflare codes.