JSON Formatter & ValidatorPretty-print, minify, and validate JSON instantly. Runs entirely in your browser.JSON to TypeScript ConverterGenerate TypeScript interfaces from any JSON sample, including nested objects and arrays.Word & Character CounterCount words, characters, sentences, paragraphs and estimated reading time.Text Case ConverterConvert between UPPER, lower, Title Case, camelCase, snake_case, kebab-case and more.Base64 Encode / DecodeEncode and decode Base64 with correct UTF-8 handling, so emoji and accents survive the round trip.URL Encoder / DecoderPercent-encode and decode URL components. Encode only what needs encoding.Hash GeneratorGenerate MD5, SHA-1, SHA-256 and SHA-512 checksums locally. Nothing is uploaded.JWT DecoderDecode a JSON Web Token and read its header and payload. Decoding only — the signature is not verified.Text Diff CheckerCompare two blocks of text line by line and see exactly what was added, removed or kept.Regex TesterTest JavaScript regular expressions against sample text and inspect every match and group.Slug GeneratorTurn headlines into clean, URL-safe slugs with optional lowercasing and separator choice.Duplicate Line RemoverRemove duplicate lines from a list, with options to trim whitespace, ignore blank lines and sort.Number to WordsSpell out numbers in English words, including decimals and negative values.HTML Entity ConverterEscape and unescape HTML entities so markup shows up as text instead of rendering.Markdown to HTMLConvert Markdown to clean HTML with a live preview. Supports headings, lists, code, links and emphasis.SQL FormatterBeautify SQL with upper-cased keywords and one clause per line.XML FormatterPretty-print XML markup and check whether it is well-formed.
Percentage CalculatorThree modes: X% of Y, X is what percent of Y, and percentage change between two numbers.Tip Calculator & Bill SplitterWork out the tip, the total, and what each person owes when splitting a bill.Loan / EMI CalculatorMonthly payment, total interest and a full amortization schedule for any fixed-rate loan.Mortgage CalculatorFull monthly cost: principal and interest plus property tax, home insurance, HOA and PMI.Compound Interest CalculatorProject how savings or a deposit grows with any compounding frequency and regular contributions.Discount CalculatorSale price, amount saved, and what stacked discounts actually add up to.ROI & Break-even CalculatorReturn on investment as a percentage, plus the unit count needed to cover fixed costs.Time Card & Work Hours CalculatorAdd up shift hours, subtract breaks, apply an overtime threshold and see gross pay.Salary & Hourly ConverterConvert hourly pay to annual salary and back, with paid time off and overtime.
Age CalculatorYour exact age in years, months and days, plus totals down to the minute.BMI CalculatorBody mass index in metric or imperial, with the WHO category and a healthy weight range.Date Difference CalculatorHow many days, weeks, months and years between two dates — inclusive or exclusive.Calorie & TDEE CalculatorBMR with Mifflin-St Jeor, then daily calories to maintain, lose or gain weight.Pregnancy Due Date CalculatorEstimate a due date from the last period, date of conception or a known ultrasound date.Grade CalculatorWork out a weighted grade, or the score you still need on the final to hit a target.Sleep Cycle CalculatorBedtimes and wake times aligned to 90-minute sleep cycles, with the 15-minute fall-asleep buffer.GPA CalculatorWeighted and cumulative GPA on the standard 4.0 scale, with credit hours.
Unit ConverterConvert length, weight, temperature, area and volume with standard factors.Number Base ConverterConvert between binary, octal, decimal and hexadecimal, with signed 32-bit support.Color ConverterConvert between HEX, RGB and HSL with a live swatch and CSS-ready output.Unix Timestamp ConverterConvert Unix timestamps to readable dates and back, in seconds or milliseconds, UTC or local.Time Zone ConverterSee the current time in major cities and convert a chosen time between zones.CSV ↔ JSON ConverterConvert CSV to JSON and JSON back to CSV, with a delimiter choice.YAML ↔ JSON ConverterConvert YAML to JSON and JSON to YAML for common flat and nested structures.Image to Base64Turn an image into a Base64 data URI you can paste straight into CSS or HTML.Speed ConverterConvert km/h, mph, m/s, knots and feet per second.Data Storage ConverterConvert bits and bytes with either decimal (1000) or binary (1024) bases.
Password GeneratorGenerate strong passwords locally with crypto-grade randomness and no ambiguous characters option.UUID GeneratorGenerate RFC 4122 version 4 UUIDs, one at a time or in bulk.QR Code GeneratorTurn any text or link into a QR code, rendered locally and downloadable as PNG.Lorem Ipsum GeneratorGenerate placeholder text by paragraph, sentence or word — classic Latin or plain English.Meta Tag GeneratorBuild SEO, Open Graph and Twitter card tags and copy ready-to-paste HTML.Image CompressorShrink JPEG, PNG or WebP by quality and max width, entirely in your browser.Favicon GeneratorTurn a square image into favicon sizes plus the HTML tags to install them.CSS Box-Shadow GeneratorBuild layered CSS box-shadows with a live preview and copy-ready code.Random Name Picker WheelSpin a wheel to pick a name fairly. Enter any list, watch it spin, remove winners and keep going.Dice RollerRoll any number of dice with any number of sides, and see the total and breakdown.Coin FlipFlip a coin once or many times, with a running tally of heads and tails.Color PickerPick any color and read off HEX, RGB, HSL, plus contrast against black and white.