All Tools

Convert between HEX, RGB, HSL color formats

Convert between CSV and JSON formats with smart parsing, custom delimiters, and file upload/download support

Format, validate, and minify JSON data with syntax highlighting and error detection

Convert Markdown to HTML and HTML back to Markdown. Support for headers, links, images, code blocks, lists, tables, and more

Convert numbers 1–3999 to Roman numerals and Roman numerals to numbers. Two-way conversion with validation.

Format, beautify, and validate SQL queries with syntax highlighting. Support for multiple SQL dialects including MySQL, PostgreSQL, SQLite, and more

Convert between Unix timestamps and human-readable dates. Relative time: "in 2 hours", "3 days ago", "next Monday" to date, or date to relative. Timezone support.

Convert XML to JSON and JSON to XML with validation and formatting controls. Client-side conversion for API payloads and integration workflows.

Convert between YAML and JSON formats with validation and formatting

Convert between square meters, square feet, acres, hectares, and other area units for real estate, construction, and land measurement with high precision

Convert between data storage units including bits, bytes, KiB, MiB, KB, MB, and more. Perfect for computing, file management, and digital storage calculations

Convert between metric, imperial, and other length units including meters, kilometers, inches, feet, miles, and more with real-time conversion

Convert between speed units including km/h, mph, m/s, knots, and Mach number. Perfect for road travel, aviation, maritime, and scientific calculations

Convert Celsius, Fahrenheit, and Kelvin with real-time conversion, smart validation, precise formatting, and one-click copy

Convert between text and different number systems

Convert text between different casing conventions

Convert between time units including seconds, minutes, hours, days, weeks, months, and years. Perfect for scheduling, project management, and daily calculations

Convert between dry volume units including bushels, pecks, dry gallons, and more. Perfect for agriculture, grain storage, and bulk material handling

Convert between metric and US customary volume units including mL, L, tsp, tbsp, fl oz, cups, pints, quarts, and gallons with real-time conversion

Convert between metric, imperial, scientific, and other weight units including kilograms, pounds, ounces, grams, and more with precision control

Convert between Base64 and Image formats

Convert text to Base64 format and decode Base64 strings

Generate MD5, SHA1, SHA256, and SHA512 from text or file upload. File hash, checksum from file, verify file integrity. Client-side only.

Encode and decode HTML entities

Encode and decode URL components

Generate Lorem Ipsum or code placeholders: variable names, JSON keys, function stubs. Customizable paragraphs, words, and formatting.

Count character or word frequency in text. Sort by count or name. Ignore case, spaces, or punctuation.

Sort lines in ascending or descending order, remove duplicates, and strip blank lines

Convert text to speech with natural-sounding voices, adjustable speed, pitch, and volume controls

Count words, characters, sentences, and paragraphs in your text

Format and validate .env files. Normalize KEY=value, optional sort, check for duplicate keys.

Calculate mean, median, mode, range, standard deviation, and variance with step-by-step calculations and data visualization

Create bar charts and line graphs online. Enter labels and values, choose bar or line chart. Free online chart maker.

Convert octal chmod modes to rwx permission strings, binary triplets, and ls-style output. Copy chmod commands with setuid, setgid, and sticky. Client-side only.

Free online click counter. Count clicks with a simple +1 button. Add an optional label and reset anytime.

Check WCAG contrast ratio between foreground and background colors. See AA and AAA pass/fail for normal and large text.

Educational: from HTTP method and request headers, see if a cross-origin request would likely trigger a CORS preflight. No server calls.

Test your clicks per second (CPS) with a timed click test. Choose 5 or 10 seconds and click as fast as you can. Free online click speed test.

Build cron expressions with presets or custom fields. Get human-readable summary and next run times.

Parse cron expressions into readable schedules and generate cron strings with upcoming run previews

Parse Content-Security-Policy values, explain directives, flag common weak patterns, and copy an advisory stricter draft.

Format and minify CSS. Beautify or collapse whitespace, remove comments. Free, client-side, no sign-up.

Format and validate CSV or TSV data. Delimiter, quote style, trim. Check column consistency.

Generate realistic sample data for testing, development, and prototyping with customizable schemas

Generate a starter .editorconfig with indent, EOL, charset, and language presets. Copy-ready.

Escape and unescape text for JavaScript, JSON, HTML, XML, SQL, and regex. Safe string encoding for code and queries.

Add, subtract, multiply, divide fractions, convert to decimals, and simplify fractions with step-by-step solutions

Pick stacks and merge starter .gitignore, .dockerignore, .npmignore, .eslintignore, .prettierignore, or .cursorignore patterns. Copy-ready in your browser.

Format and validate GraphQL documents (SDL and operations). Pretty-print and check syntax in your browser.

Join daily conversations with other guests. Uses efficient JSONL format for messages and separate metadata files.

Format and minify HTML. Pretty-print or collapse whitespace and remove comments. Free, client-side, no sign-up.

Parse raw HTTP response headers into a key-value list. Paste from DevTools, copy single headers or the full block.

Build HTTP requests with URL, method, headers, and body. Send or copy as cURL or fetch snippet.

Look up HTTP status codes by number or name—see meanings, usage, and copy codes instantly

Compress and optimize images in your browser. Reduce file size with quality control, format conversion (JPEG, PNG, WebP), and optional resize. All processing client-side.

Resize images with precision using drag & drop, preset sizes, and real-time previews. Support for JPG, PNG, WebP, GIF, and SVG formats

Format and validate INI config files. [section] and key=value, optional sort, no duplicate keys.

Calculate subnet mask, network address, usable range, and broadcast from CIDR notation (e.g. 192.168.1.0/24).

Format, beautify, and minify JavaScript code with syntax-aware output and one-click copy

Compare two JSON documents with structural path diff and formatted line diff. Client-side only.

Validate JSON data against a JSON Schema. See errors with path and message.

Look up MIME type from file extension or extension from MIME type. Browse common types.

Validate OpenAPI 3.x and Swagger 2.0 specs (YAML or JSON). Check required fields and structure.

Semver-aware package.json dependency diff and npm lockfile version map, plus full JSON structural diff.

Generate custom QR codes for URLs, text, contact info, and more with customizable colors and sizes

Generate random numbers between a defined min and max value with one click.

Build, test, and debug regular expressions with instant match highlighting and flag support

Free online scoreboard for two teams. Add points with +1, +2, +3 buttons. Customize team names and reset anytime.

Compare two semantic versions and check if a version satisfies a range (e.g. ^1.2.0). Free online version compare for developers.

Format shell and bash scripts. Indent and normalize. Runs in your browser with shfmt (WASM).

Convert titles and phrases to URL-friendly slugs: lowercase, hyphenate, strip diacritics for URLs, CMS, and SEO

Generate Subresource Integrity hashes for script and link tags from a URL or file upload. SHA-256 and SHA-384.

Check SSL/TLS certificate validity, issuer, subject, and SANs. Paste PEM or upload .pem/.crt. Client-side only.

Paste NDJSON or logs with embedded JSON. Filter by level, search, expand objects, and copy. Client-side only.

Compare two text or code snippets side-by-side or unified. Line numbers, ignore whitespace. Paste or type to diff.

Get today"s date, current time, and perform date calculations with multiple formats and timezone support

Format and validate TOML. Re-serialize with consistent structure. No conversion to JSON.

Parse, validate, and decode URLs with detailed component breakdown. Extract protocol, hostname, path, query parameters, and fragments from any URL

Parse browser, OS, and device from any User-Agent string. Debugging, analytics, and support.

Generate RFC 4122 compliant UUIDs (v1 and v4) with multiple output formats for databases, APIs, and applications

Format, validate, and minify XML with clean indentation, error highlights, and quick copy/download

Check that your XML document and XSD schema are well-formed. Paste both and validate syntax.

Format and validate YAML with consistent indentation. No conversion to JSON.

Professional EMI calculator with balloon payments, 150+ currencies, and detailed amortization schedules. Bank-level accuracy for mortgages, auto loans, and business financing.

Take control of your finances with comprehensive budget planning. Track income, expenses, set budgets, and achieve financial goals with detailed analytics

Track daily business expenses by category, add notes, and export summaries for bookkeeping and tax prep

Create professional invoices with client details, line items, taxes, discounts, and totals. Perfect for freelancers and small businesses

Calculate percentages, percentage increase/decrease, find percentage of a number, and solve percentage problems with step-by-step solutions

Build clear quotes and estimates with itemized services, optional add-ons, and built-in totals for faster approvals

Calculate SIP returns, plan investments, and achieve financial goals. Calculate step-up SIP, inflation-adjusted returns, and get detailed projections.

Calculate tips, split bills, add tax, and round totals with our comprehensive tip calculator. Perfect for restaurants, delivery, and service industry

Create simple appointment schedules, available time slots, and customer bookings

Manage and view events by day, week, or month in a smart calendar interface

Set custom countdown timers with pause, resume, and audio alerts. Perfect for productivity and time management

Build a smart grocery list with categories, quantities, and mobile-friendly checkoff

Track, manage, and maintain luxury assets including watches, jewelry, art, vehicles, and other high-value items

Convert CSV or tab-separated data into a Markdown table. Paste data, choose alignment, copy the result.

Set medication schedules with doses, times, and browser reminders that stay private in your browser

Create copyable agendas for standups, sprint planning, retros, 1:1s, and kickoffs. Set duration and project name.

Create, edit, save and manage notes directly in your browser.

Boost productivity with focused work sessions and timed breaks using the proven Pomodoro Technique

Generate timeboxed retro agendas: Start/Stop/Continue, 4Ls, Mad/Sad/Glad, Sailboat. Set team size and duration.

Compare team capacity and committed story points. Sprint length, team size, capacity %, optional velocity.

Measure elapsed time with start, stop, lap, and reset functionalities.

Inspect PEM CSRs and PKCS#8 private keys: subject, algorithms, RSA bits or EC curve. Client-side only.

Generate and compare HMAC signatures for webhook and API request debugging. Supports SHA-256, SHA-384, and SHA-512 with hex or base64 output.

Decode, encode, and verify JWT with HS256 or RS256. Explain standard claims in plain language.

Decode JWT, inspect claims, and verify RS256-family signatures against JWKS keys using kid matching. Client-side only.

Generate secure, random passwords with customizable length, character types, and strength indicators

Verify webhook signatures for GitHub, Stripe, Slack, and generic HMAC payloads. Compare expected and received signatures instantly.

Convert between angular acceleration units including rad/s², deg/s², and more. Essential for mechanical engineering and rotational dynamics

Convert between acceleration units including m/s², ft/s², g-force, and more. Essential for physics, automotive testing, and aerospace applications

Convert between coordinate systems including decimal degrees, DMS, UTM, and MGRS. Essential for GPS navigation, surveying, mapping, and military applications.

Convert between force units including newtons, pound-force, dynes, and kilogram-force. Essential for physics, engineering, construction, and automotive applications.

Convert between frequency units including Hz, kHz, MHz, GHz, RPM, and more. Perfect for electronics, audio engineering, and scientific calculations

Convert between different coordinate systems including decimal degrees, DMS, UTM, and MGRS. Essential for GPS navigation, surveying, mapping, and military applications.

Convert between g-force, acceleration (m/s², ft/s²), Gal, and related units. Essential for physics, aerospace, and automotive testing

Convert between different hardness scales including Mohs, Rockwell, Vickers, and Brinell. Essential for materials science, metallurgy, and quality control.

Convert between matrix units, determinants, eigenvalues, and normalized values with dimension normalization. Perfect for linear algebra, engineering calculations, and scientific computing

Convert between moment of force units including N·m, lbf·ft, and more. Essential for mechanical engineering and statics

Convert between moment of inertia units including kg·m², lb·ft², and more. Essential for mechanical engineering and rotational dynamics

Convert between polar coordinates (r, θ), Cartesian coordinates (x, y), and complex numbers. Perfect for mathematics, physics, engineering, and signal processing

Convert between specific volume units including m³/kg, ft³/lb, and more. Essential for thermodynamics and fluid mechanics

Convert between torque units including N⋅m, lbf⋅ft, kgf⋅m, dyn⋅cm, and more. Perfect for engineering, automotive, and mechanical applications

Convert between angular velocity units including rad/s, deg/s, RPM, and more. Essential for mechanical engineering, robotics, and rotational motion analysis

Convert between AWG, SWG, millimeters, and inches for electrical engineering and manufacturing

Convert between molar concentration units including mol/L, mol/m³, lbmol/ft³, and more. Essential for chemistry and chemical engineering

Convert between solution concentration units including %, ppm, ppb, mg/L, and more. Essential for chemistry and environmental analysis

Convert between mass flow rate units including kg/s, lb/min, g/h, and more. Essential for chemical engineering and fluid dynamics

Convert between molar flow rate units including mol/s, kmol/h, lbmol/min, and more. Essential for chemical engineering and reaction kinetics

Convert between flow rate units including L/s, m³/h, gal/min, cfm, and more. Perfect for HVAC, plumbing, chemical engineering, and irrigation applications

Convert between pressure, volume, temperature, and moles using the ideal gas law (PV = nRT)

Convert between mass flux density units including kg/m²·s, lb/ft²·hr, g/cm²·min, and more. Essential for mass transfer analysis

Convert between molarity units including mol/L, g/L, ppm, and % solution. Essential for chemistry labs, biology research, and pharmaceutical industry.

Convert between permeability units including m², darcy, millidarcy, and more. Essential for petroleum engineering and porous media flow

Convert between pH values, hydrogen ion concentrations (H+), hydroxide ion concentrations (OH-), and pOH. Essential for chemistry labs and water quality testing

Convert between salinity and total dissolved solids units including PSU, g/kg, mg/L, and more

Convert between surface tension units including N/m, dyn/cm, lb/ft, and more. Essential for fluid mechanics and interfacial phenomena

Convert between dynamic viscosity units including Pa·s, poise, centipoise, and more. Essential for fluid dynamics and rheology

Convert between kinematic viscosity units including m²/s, stokes, centistokes, and more. Essential for fluid dynamics and flow analysis

Convert between fuel efficiency units based on mass including g/kWh, lb/hp·hr, and more. Essential for automotive engineering and fuel analysis

Convert between fuel efficiency units based on volume including L/100km, mpg, and more. Essential for automotive engineering and fuel analysis

Convert between heat density units including J/m³, BTU/ft³, cal/cm³, and more. Essential for heat storage and thermal analysis

Convert between heat flux density units including W/m², BTU/hr·ft², cal/s·cm², and more. Essential for heat transfer analysis

Convert between heat transfer coefficient units including W/m²·K, BTU/hr·ft²·°F, cal/s·cm²·°C, and more. Perfect for engineering, HVAC, construction, and thermal analysis

Convert between specific heat capacity units including J/kg·K, BTU/lb·°F, cal/g·°C, and more. Essential for thermodynamics and heat calculations

Convert between temperature interval units including K, °C, °F, and °R. Essential for thermodynamics and temperature difference calculations

Convert between thermal conductivity units including W/m·K, BTU/hr·ft·°F, cal/s·cm·°C, and more. Essential for heat transfer analysis

Convert between thermal expansion coefficient units including 1/K, 1/°C, 1/°F, and more. Essential for materials science and engineering

Convert between thermal resistance units including K/W, °C/W, °F·hr/BTU, and more. Essential for heat transfer and insulation analysis

Convert between digital image resolution units including DPI, PPI, pixels/cm, and more. Essential for digital imaging and printing

Convert between frequency and wavelength units including Hz, THz, nm, μm, and more. Essential for optics and electromagnetic wave analysis

Convert between illumination units including lux, foot-candle, phot, and more. Essential for lighting design and photometry

Convert between luminance units including cd/m², nit, stilb, lambert, and more. Essential for lighting design and photometry

Convert between luminous intensity units including candela, lumen/steradian, and more. Essential for lighting design and photometry

Convert between photon energy units including eV, nm, Hz, and joules. Essential for optics, spectroscopy, and quantum physics.

Convert between W/m², mW/cm², BTU/hr·ft², cal/cm²·min, erg/cm²·s, and solar flux units. Essential for optics, solar energy, and environmental science

Convert between different radiation units including gray, rad, sievert, and rem. Essential for health physics, nuclear science, and medical imaging.

Convert between radiation absorbed dose units including grays, rads, and more. Essential for health physics and medical physics

Convert between radiation activity units including becquerels, curies, and more. Essential for nuclear physics and medical imaging

Convert between radiation exposure units including roentgens, C/kg, and more. Essential for health physics and radiation protection

Convert between astronomical distance units including AU, light years, parsecs, kilometers, and miles. Essential for astrophysics, space exploration, and astronomy education.

Convert between data transfer rate units including bits/s, bytes/s, Mbps, Gbps, and more. Essential for networking and data communication

Convert between SI prefixes including kilo, mega, giga, milli, micro, nano, and more. Essential for scientific notation and unit scaling

Convert between sound units including decibels, bel, neper, and more. Essential for audio engineering and acoustics

Calculate essential statistical measures including mean, median, mode, standard deviation, variance, and correlation. Perfect for data analysis, research, business analytics, and education

Convert between typography units including points, picas, ems, rems, and more. Essential for graphic design and web development

Convert between lumber volume units including board feet, cubic meters, cubic feet, and more. Essential for woodworking and construction

Calculate percent error between experimental and theoretical values

Basic calculator for addition, subtraction, multiplication, and division operations

Calculate price per unit from total price and quantity. Compare two products to see which is cheaper per oz, kg, or any unit.

Calculate weighted averages where different values have different importance or weights

Convert between electric charge units including coulombs, ampere-hours, faradays, and more. Essential for electrical engineering and electrochemistry

Convert between electric current units including amperes, milliamperes, microamperes, and more. Essential for electrical engineering

Convert between electric conductance units including siemens, millisiemens, and more. Essential for electrical engineering

Convert between electric conductivity units including S/m, S/cm, mS/cm, and more. Essential for electrical engineering and materials science

Convert between electric field strength units including V/m, V/cm, kV/m, and more. Essential for electrical engineering and electrostatics

Convert between electric potential units including volts, millivolts, kilovolts, and more. Essential for electrical engineering

Convert between electric resistance units including ohms, milliohms, kilohms, and more. Essential for electrical engineering

Convert between electric resistivity units including Ω·m, Ω·cm, μΩ·cm, and more. Essential for electrical engineering and materials science

Convert between capacitance units including farads, microfarads, picofarads, and more. Essential for electrical engineering

Convert between inductance units including henries, millihenries, microhenries, and more. Essential for electrical engineering

Convert between linear charge density units including C/m, C/cm, and more. Essential for electrical engineering and electrostatics

Convert between linear current density units including A/m, A/cm, and more. Essential for electrical engineering and electromagnetics

Convert between surface charge density units including C/m², C/cm², and more. Essential for electrical engineering and electrostatics

Convert between surface current density units including A/m², A/cm², and more. Essential for electrical engineering and electromagnetics

Convert between volume charge density units including C/m³, C/cm³, and more. Essential for electrical engineering and electrostatics

Convert between magnetic field strength units including A/m, Oe, and more. Essential for electrical engineering and electromagnetics

Convert between magnetic flux units including webers, maxwells, and more. Essential for electrical engineering and electromagnetics

Convert between magnetic flux density units including teslas, gauss, and more. Essential for electrical engineering and electromagnetics

Convert between magnetomotive force units including ampere-turns, gilberts, and more. Essential for electrical engineering and electromagnetics