All tools

Convert numbers between binary, octal, decimal, and hexadecimal. Supports huge numbers via

Pick a preset or enter your own fields to build a cron expression. Includes a plain-Englis

Beautify minified CSS with proper indentation, or minify pretty CSS to a single line. Pres

Instantly compute MD5 and SHA-family hashes of any text. All hashing happens in your brows

Beautify minified HTML with proper indentation, or minify pretty HTML for production. Pres

Every common HTTP header explained, grouped by purpose. Searchable by name or keyword. Inc

Every HTTP status code you need to know, grouped by category, with plain-English descripti

Format, validate, and minify JSON in your browser. See parse errors with line/column. Opti

Escape any text for safe embedding as a JSON string, or unescape a JSON string back to pla

Paste a JSON blob and get TypeScript interface declarations. Handles nested objects, array

Paste any JSON Web Token (JWT) to see the decoded header, payload, and expiration status.

Generate strong random passwords with configurable length, character sets, and ambiguity-a

Generate random numbers in any range. Integers or decimals, unique or with repeats, Math.r

Test JavaScript regular expressions against any string with live match highlighting, captu

Convert any number (1–3999) to Roman numerals and back. Validates canonical form and sugge

Format and beautify SQL for 10 dialects including PostgreSQL, MySQL, SQLite, BigQuery, Sno

Generate cryptographically-strong UUIDs in bulk. Supports v4 (random), v7 (time-ordered),

Format XML with proper indentation, validate against the XML spec, or minify to a single l

Format and validate YAML in your browser. Multi-document (---) supported. Errors point to

Convert text between 12 cases: lower, UPPER, Title, Sentence, camelCase, PascalCase, snake

Sort lines alphabetically, numerically, or by length. Remove duplicates, trim whitespace,

Generate placeholder text in classic Lorem Ipsum or six themed flavors: hipster, pirate, c

Convert any text into the NATO phonetic alphabet — Alfa, Bravo, Charlie, Delta, Echo, Foxt

Check if a word, phrase, or sentence is a palindrome. Optionally ignore case, spaces, and

Generate random strings for tokens, IDs, or test fixtures. Choose length, character set, c

Convert titles into clean URL slugs. Handles Unicode, strips diacritics, and lets you pick

Compare two blocks of text line by line and see exactly what changed. Runs entirely in you

Repeat any text a chosen number of times with a custom separator. Handy for load tests, se

Reverse text by characters, words, lines, or sentences. Handles emoji and surrogate pairs

Trim lines, collapse extra spaces, remove blank lines, normalize line endings (LF/CRLF), a

Instantly count words, characters, sentences, paragraphs, lines, and reading time. Everyth

Paste any color in hex, rgb(), rgba(), or hsl() and get it in every other format instantly

Test any foreground/background color pair against WCAG 2.2 contrast rules. Shows the ratio

Browse all 147 CSS3 named colors. Look up a color name from a hex code, or find the closes

Design linear, radial, and conic CSS gradients with unlimited color stops. Live preview an

Generate favicons from any letter, emoji, or short text. Custom gradient backgrounds. Down

Resize any image to any dimensions and convert to WebP, JPEG, or PNG. Quality slider. Neve

Convert CSV data to JSON (or JSON to CSV) with configurable delimiter, header row option,

Convert between JSON and YAML in either direction. Handles nested objects, arrays, comment

Convert between degrees, radians, gradians, turns, arcminutes, and arcseconds. Instant, hi

Convert cooking measurements between US customary (cups, tbsp, tsp, oz) and metric (ml, g)

Convert between units across 8 dimensions: length, mass, volume, time, area, digital stora

Enter a date of birth to see age in years, months, days, hours, minutes, and seconds. Opti

Calculate your Body Mass Index (BMI) in metric or imperial units. Shows category and healt

Calculate your weighted GPA across any number of courses. Supports 4.0, 4.3, and 5.0 lette

Every percentage calculation in one place: X% of Y, X is what % of Y, change from A to B,

Calculate tip amount, total, and per-person split for any bill. Presets for 10 / 15 / 18 /

Project long-term investment growth with compound interest and regular contributions. Choo

Calculate sale price and savings for any discount percentage. Includes common presets (10%

Calculate monthly loan payments and total interest for any amount, rate, and term. See how

Calculate your monthly mortgage payment, total interest, and a year-by-year amortization s

Add tax to a net price OR reverse-calculate the pre-tax price from a gross total. Works fo

Count down to any date and time, second by second. Add a label and share the URL — everyth

Add or subtract any combination of years, months, weeks, days, hours, minutes, or seconds

Convert any date into 12+ common formats: ISO 8601, RFC 2822, US MM/DD/YYYY, EU DD/MM/YYYY

Convert a time between any IANA time zones. See offsets, live now, and multiple destinatio

Convert Unix timestamps (seconds or milliseconds) to human-readable dates in every common

Find the day of the week for any date, past or future. Also shows ISO week number, day of

Count business days between two dates, excluding weekends and custom holiday dates. Great

Encode any text to RFC 4648 Base32 (A-Z, 2-7) or decode Base32 back to text. UTF-8 safe. R

Encode or decode Base64 text. UTF-8 safe by default. Optional URL-safe variant. Runs entir

Encode and decode HTML entities: &, <, ©, and every numeric &#nnn; entity.

Translate text to Morse code and back. Full alphabet, digits 0-9, and common punctuation.

Convert international domain names (IDN) with Unicode characters into Punycode (xn--) repr

Encode or decode text with ROT13 or a Caesar cipher of any shift (-25 to +25). Round-trip

Convert text into 8-bit binary (UTF-8) or decode binary back to text. Handles multi-byte c

Percent-encode or decode URLs, query strings, and path segments. Choose between encodeURI

Generate SEO, Open Graph, and Twitter Card meta tags from your title, description, URL, an

Generate QR codes for URLs, text, WiFi credentials, and more. Customize colors and error c

Break any URL into its protocol, host, port, path, query parameters, and hash. Uses the br

Parse any User-Agent string to identify the browser, engine, OS, and device. Auto-detects

Drop any file to compute its SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.