All Tools

Create and edit 3D scenes in your browser. Add primitives, transform objects, adjust materials. Export to GLTF/GLB. Free online 3D modeling tool

Calculate exact age in years, months, days from birthdate. Find days between two dates, upcoming birthday countdown. Free online age calculator

Learn how AI language models work. Visualize tokenization, simulate temperature sampling, count tokens, build prompts. Interactive LLM tutorial and prompt engineering helper

Generate mock API responses with fake JSON data. Create realistic REST API test data. Free mock server response generator for developers

Create C4 model architecture diagrams. Design system context, container, component diagrams visually. Export to PNG/SVG. Free software architecture tool

Convert text to ASCII art banners with various fonts. Create text art for terminals, comments. Free online ASCII text art generator with FIGlet fonts

Calculate and convert image/video aspect ratios. Find dimensions for 16:9, 4:3, 21:9 and custom ratios. Free online aspect ratio calculator

Record, edit, mix audio with waveform visualization. Cut, trim, apply effects to audio. Free online audio editor and recorder in browser

Generate EAN-13, UPC-A, Code128, Code39, ITF barcodes. Download as PNG or SVG. Free online barcode maker for products and inventory

Encode and decode Base64 strings online. Convert text, files and images to Base64 format. Free Base64 encoder/decoder tool with copy button

Estimate BAC from drinks consumed. Widmark formula, multiple drink types, time to sober up, legal limits by country. Free online BAC calculator

Calculate Body Mass Index (BMI) with height and weight. Get health category (underweight, normal, overweight, obese). Free online BMI calculator

Estimate body fat percentage using US Navy method or BMI. Calculate fat mass and lean mass. Free body composition calculator

Visual border-radius generator for CSS. Create rounded corners, pills, organic shapes. Generate CSS border-radius code with live preview

Convert text to Braille dots (Unicode) and back. Support for letters, numbers, and punctuation. Free online Braille encoder and decoder

Calculate daily calorie needs (TDEE) based on age, weight, height, and activity level. Get macro recommendations. Free TDEE calculator

Create beautiful charts from CSV or JSON data. Bar, line, pie, scatter, area charts. Export as PNG or SVG. Free online chart maker

Calculate Unix/Linux file permissions. Convert between symbolic (rwx) and numeric (755, 644) notation. Free chmod permission calculator online

Format and beautify JSON, XML, CSS, HTML, JavaScript, SQL code. Auto-indent and syntax highlight. Free online code beautifier and formatter

Create beautiful code screenshots with syntax highlighting. Carbon-like code images with themes. Free online code snippet to image converter

Simulate how images appear to people with color blindness. Test designs for protanopia, deuteranopia, tritanopia. Free color vision deficiency checker

Check WCAG color contrast accessibility compliance. Extract colors from images. Analyze color palettes for web accessibility. Free color checker

Pick colors from HEX, RGB, HSL. Generate color palettes and harmonies. Create gradients. Free online color picker and palette maker for designers

Calculate permutations, combinations, factorial, binomial coefficients. Probability distributions calculator. Free online combinatorics tool

Calculate with complex numbers: addition, multiplication, division, polar form, conjugate. Visualize on Argand diagram. Free complex number calculator

Calculate compound interest with visual growth chart. Compare simple vs compound interest. Monthly contributions support. Free online investment calculator

Debug CORS issues, analyze headers, generate server configurations. Support for Express, Nginx, Apache, Django, Flask, Spring Boot. Learn CORS concepts. Free online CORS tester

Build cron expressions visually with schedule preview. Validate crontab syntax for Linux, Kubernetes, AWS. Free online cron job generator

Calculate cryptocurrency portfolio value and profit/loss. Track investments, average buy price, ROI percentage. Support for multiple coins

Convert cryptocurrency units. Satoshi to Bitcoin, Wei to Gwei to Ether, and more. Live price conversion between crypto and fiat currencies

Build Content-Security-Policy headers visually. Add directives, sources, preview policy. Free online CSP generator for web security

Build CSS keyframe animations visually with timeline editor. Create custom @keyframes. Free online CSS animation generator with live preview

Create CSS box shadows visually with multiple layers. Adjust blur, spread, offset, color. Free online box-shadow CSS code generator

Visual CSS Flexbox layout builder. Configure flex container and items with live preview. Generate flexbox code for responsive layouts. Free online flexbox playground

Create beautiful linear, radial, conic CSS gradients visually. Copy CSS code instantly. Free online gradient maker with multiple color stops

Visual CSS Grid layout builder. Define rows, columns, gaps with live preview. Generate grid-template code. Free online CSS Grid playground and code generator

Real-time currency converter with live exchange rates. Convert USD, EUR, GBP, PLN, JPY and 150+ world currencies. Free forex calculator online

Check if your email or password was exposed in a data breach. Uses Have I Been Pwned database. Check breach details and protect your accounts

Convert data between JSON, CSV, YAML, XML, TOML formats online. Free data format transformer with syntax validation and pretty printing

Advanced spreadsheet-like table editor. Sort, filter, search data. Basic formulas support. Import/export CSV, JSON. Free online data grid editor

Visual ERD designer for database schemas. Create tables, define relationships, foreign keys. Export to SQL for MySQL, PostgreSQL, SQLite. Free online ERD tool

Calculate days between dates, working days excluding weekends and holidays. Add/subtract time from dates. Support for Poland, USA, Germany, UK, France holidays

Spin the wheel to make random decisions. Add custom options for random picker. Free online spinning wheel, random name picker, wheel of fortune

Place screenshots in device frames - iPhone, MacBook, iPad, Android, browser windows. Free online mockup generator for presentations and marketing

Create flowcharts, UML diagrams, mind maps visually. Export to SVG/PNG. Free online diagram maker and flowchart creator

Build docker-compose.yml files visually. Add MySQL, PostgreSQL, Redis, MongoDB services. Free online Docker Compose YAML generator

Search and copy emojis by category. Find emoticons, symbols, flags for social media. Free online emoji keyboard with search and recent emojis

Learn how AES and RSA encryption works step by step. Visualize encryption process, key generation, and cipher operations. Interactive cryptography tutorial

Solve linear, quadratic, cubic equations and systems of equations online. Step-by-step solutions with graphing. Free math equation solver calculator

Generate favicons in all sizes (16x16, 32x32, 180x180) from any image. Create ICO and PNG favicons. Free online favicon maker for websites

Calculate MD5, SHA-1, SHA-256, SHA-512 checksums for files. Verify file integrity and compare hashes. Free online file hash calculator

Convert file sizes between bytes, KB, MB, GB, TB. Calculate transfer times at different speeds. Free online file size converter

Calculate area, perimeter, volume of 2D and 3D shapes. Circle, triangle, rectangle, sphere, cube formulas. Free online geometry calculator with diagrams

Build Git commands interactively with options and flags. Learn branching, merging, rebasing with visualizations. Quick recipes for common Git workflows

Generate conventional commit messages following Angular, Conventional Commits standards. Create semantic git commits. Free commit message builder

Generate .gitignore files for any project. Templates for Node, Python, Java, Go, React, Vue, and more. Free online gitignore generator

Apply glitch effects to images. Databending, pixel sorting, RGB shift, scan lines. Free online glitch effect maker for aesthetic art

Preview and compare Google Fonts with custom text. Find font pairings for web design. Free online font tester and typography playground

Plot mathematical functions and equations. Create line, scatter, parametric graphs. Free online graphing calculator and function visualizer

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files. Verify file checksums. Free online hash calculator and checksum generator

Encode and decode HTML entities online. Convert special characters like <, >, &, quotes to HTML entities. Free HTML escape/unescape tool

Complete list of HTTP status codes with descriptions and examples. Learn 200, 301, 404, 500 error codes. Free HTTP response code reference guide

Validate International Bank Account Numbers (IBAN). Check format, country, checksum. Identify bank from IBAN. Support for 80+ countries

Remove background from images using AI. Works offline in your browser. Free online background eraser, no upload to server required

Compress and resize images online without losing quality. Reduce JPEG, PNG, WebP file size. Free image optimization tool with adjustable quality

Convert images between PNG, JPEG, and WebP formats. Batch conversion with quality control. Free online image format converter

Edit images with crop, resize, rotate, filters, text. Draw shapes and annotations. Free online photo editor in browser, no upload required

Convert images to Base64 encoded strings for embedding in HTML/CSS. Support for PNG, JPEG, GIF, WebP. Free online image to data URI converter

Extract text from images using optical character recognition. Support for screenshots, photos, scanned documents. Free online OCR tool, works offline in browser

Calculate how inflation affects purchasing power over time. Historical inflation impact calculator. Free inflation rate calculator

Chromatic tuner using your microphone. Detect pitch, see nearest note, tune guitar, bass, ukulele, violin. Free online instrument tuner with cent deviation

Find and remove hidden Unicode characters in text. Detect zero-width spaces, RTL marks, homoglyphs. Debug copy-paste issues

Create professional PDF invoices with logo, line items, taxes, and totals. Free online invoice maker, no registration required. Export to PDF instantly

Calculate IP subnets, network ranges, broadcast addresses, CIDR notation. IPv4 subnet mask calculator. Free online IP/CIDR calculator for network admins

Generate JSON Schema from example JSON data automatically. Create validation schemas for APIs. Free online JSON Schema builder for developers

Generate TypeScript interfaces from JSON data. Support for nested objects, arrays, optional properties. Free online JSON to TS interface generator

Compare two JSON documents with visual tree diff. Highlight added, removed, modified nodes. Expandable tree view. Free online JSON comparison tool

Test JSONPath expressions with live results. Query JSON documents with JSONPath syntax. Free online JSONPath evaluator and debugger

Generate JSON Web Tokens with custom claims. Support for HS256, HS384, HS512 algorithms. Set expiration, issuer, subject, audience. Free online JWT generator

Decode and inspect JWT tokens. View header, payload, signature. Verify JWT expiration and claims. Free online JSON Web Token decoder and debugger

Sort, deduplicate, reverse, shuffle, filter, and number lists. Multiple list operations in one place. Free online list manipulation tool

Calculate monthly loan payments, total interest, amortization schedule. Mortgage, car loan, personal loan calculator. Free EMI calculator online

Generate Lorem Ipsum placeholder text for web design and mockups. Create paragraphs, sentences, words. Free dummy text generator online

Write and preview Markdown with live rendering. GitHub Flavored Markdown support. Free online Markdown editor with syntax highlighting

Create and edit Markdown tables visually. Import from CSV/Excel. Free online Markdown table maker with alignment options

Perform matrix operations: addition, multiplication, inverse, determinant, transpose, eigenvalues. Free online linear algebra matrix calculator

Generate SEO meta tags, Open Graph, Twitter Cards with live preview. Optimize website metadata for search engines and social sharing

Professional metronome with tap tempo, time signatures (4/4, 3/4, 6/8), accent patterns, and visual beat indicator. Free online metronome for musicians

Convert text to Morse code and back with audio playback. Learn Morse code online with visual dots and dashes. Free Morse code translator

Convert text to NATO phonetic codes (Alpha, Bravo, Charlie). Audio playback with Web Speech API. Free online NATO alphabet converter

Validate Polish NIP (tax ID) and PESEL (personal ID) numbers. Extract birth date, gender, and age from PESEL. Check NIP checksum. Free online validator

Sleep sound machine with white, pink, brown noise, rain, ocean waves & nature sounds. Sleep timer with fade-out, binaural beats for deep sleep & focus. Free ambient noise generator

Convert numbers between binary, octal, decimal, hexadecimal and custom bases (2-36). Free online number system converter for programmers

Create canvas-based particle systems with presets like confetti, snow, fire, rain, stars. Adjustable parameters. Export as PNG or WebM. Free online particle effects maker

Generate secure passphrases using Diceware and EFF wordlists. Create memorable yet strong passwords. Free online passphrase maker

Generate strong random passwords with letters, numbers, symbols. Customizable length and complexity. Free secure password generator online

Merge, split, rotate PDF files online. Create PDFs from images. Rearrange PDF pages. Free online PDF editor and converter without upload limits

Calculate percentages, percentage increase/decrease, find X% of Y, what percent is X of Y. Free online percentage calculator with formulas

Create pixel art with layers, color palettes, animation frames. Draw 8-bit retro sprites. Free online pixel art maker and sprite editor

Free Pomodoro technique timer for productivity. 25-minute work sessions with 5-minute breaks. Customizable focus timer with notifications

Track gold, silver, platinum, and palladium prices. Calculate metal value by weight. Free precious metals price tracker

Calculate due date from LMP or conception. Week-by-week fetal development, baby size, milestones. Free pregnancy calculator with timeline

Create QR codes for URLs, text, WiFi, vCard contacts. Customize colors and download PNG/SVG. Free online QR code maker with logo support

Scan and decode QR codes from images or camera. Read QR code content instantly. Free online QR code reader and barcode scanner

Generate fake names, emails, addresses, phone numbers for testing. Create realistic test data in JSON/CSV. Free mock data generator online

Test and debug regular expressions with real-time matching. Regex pattern builder with explanation. Free online regex tester for JavaScript, Python, PHP

Convert between Arabic numbers and Roman numerals (1-3999). Validate Roman numeral format. Free online Roman to Arabic and Arabic to Roman converter

Record your screen, browser tab or webcam directly in browser. No installation required. Export to WebM or GIF. Free online screen capture tool

Write and preview GLSL fragment shaders in real-time. Create stunning visual effects with WebGL. Includes preset shaders: plasma, mandelbrot, fire, raymarching

Calculate optimal bedtime and wake times based on 90-minute sleep cycles. Sleep debt calculator, chronotype quiz, sleep recommendations by age

Create sounds with oscillators, harmonics and ADSR envelopes. Generate tones, waves, sound effects. Free online audio synthesizer and tone generator

Format and beautify SQL queries with syntax highlighting. Support for MySQL, PostgreSQL, SQL Server. Free online SQL formatter and pretty printer

Run SQL queries in your browser with SQLite. Import CSV files, create tables, export results. Free online SQL editor and database sandbox

Generate SSH key pairs (RSA, Ed25519) in your browser. Export in OpenSSH or PEM format. Secure client-side key generation. Free online SSH keygen tool

Analyze X.509 SSL/TLS certificates. View issuer, validity, SANs, certificate chain. Check SSL certificate details. Free online certificate decoder

Check SSL certificate for any domain. View expiration date, issuer, certificate chain. Verify HTTPS security and get SSL rating

Design finite state machines visually. Define states, transitions, actions. Generate XState code. Free online FSM and statechart editor

Calculate mean, median, mode, standard deviation, variance and more. Statistical analysis with histograms and charts. Free online statistics calculator

Draw and edit SVG paths visually with Bezier curves. Create icons and shapes. Free online SVG path builder with code output

Generate valid test credit card numbers for development. Visa, Mastercard, Amex, Discover. Luhn-valid numbers for payment testing. Free fake card generator

Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case. Free online text case changer and transformer

Clean up text by removing duplicate lines, trimming whitespace, removing empty lines, normalizing spaces. Multiple operations in one pass. Free online text sanitizer

Compare two texts and highlight differences side by side. Find changes between files, code versions. Free online text comparison diff tool

Encrypt and decrypt text with AES-256 encryption. Secure message encryption with password protection. Free online text encryptor/decryptor

Convert text to binary and hexadecimal representation. Character-by-character breakdown with ASCII/UTF-8 codes. Free online text encoder

Convert text to speech using your browser. Listen to text in multiple languages and voices. Adjust speed and pitch

Convert Unix timestamps to human-readable dates and vice versa. Support for milliseconds, seconds, ISO 8601, RFC 2822 formats. Free epoch converter online

Calculate tips and split bills. Multiple tip percentages, round up option. Free restaurant tip calculator

Generate 2FA codes (Google Authenticator compatible). Add secrets manually or scan QR codes. Free online TOTP generator for testing two-factor authentication

Test your typing speed in WPM (words per minute) with accuracy stats. Improve typing skills with practice texts. Free online typing test

Free online unit converter. Convert length (meters, feet, inches), weight (kg, lbs), temperature (Celsius, Fahrenheit), volume, area, speed and more units instantly

Encode and decode URLs online. Convert special characters to percent-encoding for safe URLs. Free URL encoder/decoder tool for developers

Generate SEO-friendly URL slugs from text. Convert titles to clean URLs with diacritics removal. Free online slug generator for websites

Parse and analyze browser User-Agent strings. Detect browser, OS, device type from UA. Free online User-Agent decoder and analyzer

Generate UUID v1, v4, v7 universally unique identifiers. Bulk UUID generation and validation. Free online GUID/UUID generator for developers

Convert video clips to animated GIFs. Control FPS, size, duration, crop region. Free online video to GIF converter, works offline in browser

Decode Vehicle Identification Numbers (VIN). Find manufacturer, country, model year, plant code, serial number. Free online VIN lookup and validator

Validate cryptocurrency wallet addresses. Check if Bitcoin, Ethereum, Solana, Litecoin addresses are valid. Detect address type and network

Check cryptocurrency wallet balance by address. View Bitcoin, Ethereum, Solana balances. See transaction history and token holdings. Real-time blockchain data

Calculate how much water you should drink daily based on weight, activity, and climate. Free hydration calculator

Capture screenshot of any website by URL. Preview how sites look on different devices. Download screenshots in high quality

Find your public IP address with geolocation, ISP, timezone info. Check IPv4/IPv6 address, hostname, browser details. Free online IP lookup tool

Count words, characters, sentences, paragraphs in text. Calculate reading time, keyword density. Free online word count tool for writers

View current time in multiple cities and timezones. Compare time zones, find time difference. Free world clock with daylight saving support

Test XPath expressions on XML documents with live results. Debug XPath queries for web scraping. Free online XPath evaluator and validator

Transform XML documents using XSLT stylesheets. Live preview of rendered HTML. Built-in templates for tables, cards, lists. Free online XSLT processor