Free Online Tools — Fast And Simple

Test REST APIs instantly - Like Postman, but in your browser

Encode and decode Base64 strings easily

Visual Linux chmod file permissions calculator with octal numbers, symbolic notation, and shell commands.

Create beautiful, presentation-ready charts and graphs online: Bar, Horizontal Bar, Line, Area, Pie, and Donut charts with customizable color themes and instant PNG/SVG export.

Format and beautify code in JavaScript, CSS, HTML, SQL, Python, and more

Minify HTML, CSS, and JavaScript to reduce file size

Build, parse, and explain cron expressions with human-readable explanations and next run schedules.

View, edit, and convert CSV to JSON or other formats

Convert cURL commands to JavaScript Fetch, Axios, Python Requests, Go, and PHP

Generate Lorem Ipsum, fake user data, and test data

Generate complete favicon packages for modern websites, iOS, Android, and PWAs from an image or emoji. Includes HTML head tags and web manifest.

Generate MD5, SHA-1, SHA-256 hashes from text

Convert special characters to HTML entities and vice versa instantly

Convert raw HTML code into clean, valid React JSX or TSX. Automatically handles className, htmlFor, inline styles, SVG camelCase attributes, and self-closing tags.

Compare two JSON objects side-by-side with visual color-coded highlighting of added, removed, and modified values.

Format, validate, and beautify JSON data with syntax highlighting

Convert JSON data into TypeScript interfaces, Type aliases, or clean YAML with type inference.

Decode and inspect JSON Web Tokens

Preview how your website link will appear when shared on Facebook, X (Twitter), LinkedIn, Zalo, and Google Search.

Create custom mock APIs instantly for testing and prototyping

Convert numbers between different bases and perform bitwise operations instantly

Test and debug regular expressions with real-time results

Visualize GitHub repository structure and generate markdown tree

Format, beautify, indent and minify SQL queries for PostgreSQL, MySQL, SQLite, BigQuery

Convert SQL CREATE TABLE statements into TypeScript interfaces, Zod schemas, and Go structs. Supports PostgreSQL, MySQL, and SQLite data types.

Test and validate STUN/TURN server configuration for WebRTC

Convert between Unix timestamp and human-readable date

Encode and decode URL strings for web development

Deconstruct URLs into protocol, host, path, and query params. Edit query strings live, build trackable marketing UTM campaign links, and encode/decode parameters.

Generate UUID v1 and v4 unique identifiers

Convert seamlessly between YAML and JSON with real-time bidirectional parsing, syntax validation, customizable indent spacing, and file export.

Calculate, simplify, and resize aspect ratios for videos, photos, and displays. Includes a screen PPI (Pixels Per Inch) density and dot pitch calculator.

Interactive CSS box-shadow and glassmorphism generator with multi-layer shadows and live preview.

Create custom geometric shapes, polygon cutouts, and responsive CSS clip-paths with an interactive draggable vertex canvas, rich presets, and instant Tailwind / SVG export.

Convert colors between HEX, RGB, HSL, HSV, and CMYK. Test WCAG 2.1 accessibility contrast ratios (AA/AAA compliance) for web designers and developers.

Pick colors and convert between HEX, RGB, HSL formats

Convert between px, rem, em, pt, %, and viewport units instantly

Design modern frosted glass UI elements with real-time preview. Copy pure CSS, Tailwind CSS v4 classes, or React inline styles.

Create stunning CSS linear, radial, and mesh gradients with curated palettes, angle controls, and one-click code export.

Compress PNG, JPG, WebP images without losing quality

Generate soft tactile Neumorphism and puffy 3D Claymorphism UI styles with dual drop shadows, inset bevels, light angles, and instant CSS / Tailwind export.

Generate placeholder images with custom sizes. Simple API for developers.

Convert PNG, JPG images to SVG vector format

Create professional promotional images with custom dimensions

Compress and minify SVG files online. Strip bloated Illustrator and Inkscape editor metadata, clean unused attributes, round decimal precision, and reduce SVG file size.

Preview, edit and optimize SVG files in real-time

Convert between Tailwind CSS classes and vanilla CSS styles

Compare two texts and find differences

Write, preview, and export Markdown documents

Convert Markdown documents into beautifully styled PDF files online. Choose from GitHub, Academic, and Minimalist themes with vector printing quality.

Convert numbers to words in English and Vietnamese. Supports financial currency format, large numbers (billions/trillions), decimals, and voice pronunciation.

Convert text between different cases: uppercase, lowercase, title case, and more

Convert normal text into cool, aesthetic Unicode fonts and retro ASCII art banners for Instagram, Facebook, TikTok, Discord, and gaming usernames.

Count words, characters, sentences, paragraphs, and estimate reading time in real-time.

Lookup multiple IP addresses at once with interactive world map visualization and country breakdown

Check DNS records, WHOIS, and domain information

Find your public IP address and geolocation

Generate strong random passwords or strengthen existing ones

Analyze password security and Shannon entropy bits with offline GPU crack time estimations, common pattern detection, and a cryptographically secure password generator.

Encrypt and decrypt text with AES-256, ROT13, and Caesar cipher

Download magazines, catalogs, newspapers, and publications from Issuu as high-quality PDF files. Free, fast, and no registration required.

Download documents, books, and presentations from Scribd as PDF files

Download presentations from SlideShare as PDF or PPT files

Download study documents from StuDocu for offline access

Shuffle questions and choices to generate multiple exam test codes with automatic answer key matrix

Calculate grade point average and predict target GPA

Write, preview, and copy LaTeX equations

Export Quizlet flashcard sets to Anki, CSV, Notion, and Excel. Customize separators, swap terms and definitions, remove duplicates, and download ready-to-study flashcard decks.

Split participants or students into balanced random teams or groups instantly

Test and practice your typing speed (WPM) and accuracy in English and Vietnamese with live real-time metrics.

Generate pure, synthetic soothing ambient sounds for focus, study, sleep, and tinnitus relief: White, Pink, and Brown Noise, Rain, Campfire, and Binaural Beats with an interactive multi-track mixer and timer.

Automate Bing searches effortlessly to earn Microsoft Rewards points on PC and Mobile with human-like timing.

Create custom barcodes in Code 128, EAN-13, UPC, Code 39, and more. Download high-res PNG/SVG or scan existing barcodes instantly.

Accurately calculate your Body Mass Index (BMI), BMR, TDEE, and daily calorie targets for weight loss or muscle gain with WHO medical standards.

Count down to your important events and deadlines

Calculate exact days between two dates, exclude weekends for working business days, add/subtract duration, and compute exact chronological age with fun life statistics.

Schedule event reminders with email and browser notifications

Create professional business invoices in seconds. Customize company branding, tax rates, itemized tables, currencies, and download instant print-ready PDFs.

Calculate mortgage, loan repayments, and compound interest with monthly amortization schedules and visual charts.

Convert PDF to images and images to PDF

Split pages from a PDF or merge multiple PDF files into one directly in your browser. 100% private and client-side.

Boost your productivity with the Pomodoro technique. Features customizable focus/break intervals, soothing ambient white noise (Rain, Café, Ocean), and task tracking.

Generate customizable QR codes with logos, colors, and styles

Scan QR codes and barcodes online using your camera or by uploading an image. Detect URLs, Wi-Fi networks, text, and contact cards instantly.

Create pixel-perfect, high-resolution social media post mockups for X (Twitter), Threads, and LinkedIn with custom avatars, verified badges, metrics, themes, and instant PNG export.

Test your internet connection speed, latency (Ping), and jitter in real-time with an animated speed gauge meter.

Precise time measurement with lap tracking functionality

Convert units of measurement instantly across 10 categories: Length, Weight, Temperature, Area, Volume, Speed, Time, Digital Storage, Energy, and Pressure.

Shorten long URLs with multiple services

Check current time across multiple time zones

Convert audio files between WAV, WebM, and MP3 formats directly in your browser. Adjust sample rates, channels (Mono/Stereo), and optimize file sizes without server uploads.

Cut and trim audio files (MP3, WAV, M4A) directly in your browser with interactive waveform visualization. Fast and 100% private.

Inspect detailed EXIF metadata in photos (Camera model, lens, exposure, ISO, GPS coordinates) and strip sensitive metadata to protect privacy before sharing.

Extract text from images using OCR technology

Protect your photos with custom text or logo watermarks. Features batch processing, full-tile repeating patterns, transparency controls, and ZIP export.

Test your computer keyboard online. Check for broken or sticky keys, test N-Key Rollover (NKRO) anti-ghosting, detect key chatter, and inspect key codes.

Test your microphone with real-time waveform visualization and audio quality analysis

Test mouse buttons (Left, Right, Middle, Back, Forward), scroll wheel, detect faulty switch double-clicks (chatter), and measure Clicks Per Second (CPS) speed.

Remove image backgrounds instantly with AI-powered tools

Record your screen, webcam, and microphone directly in your browser with no software installation or time limits.

Diagnose your display for dead pixels, stuck subpixels, color uniformity, gradient banding, contrast dynamic range, and motion blur ghosting in full screen.

Convert audio files to text instantly

Convert written text into natural-sounding speech with customizable voice, speed, pitch, and word-by-word highlighting.

Convert MP4, WebM, and MOV videos into high-quality animated GIFs directly in your browser. Trim start and end times, adjust FPS, and resize resolution without server uploads.

Test your computer or phone webcam online. Check camera resolution, live FPS, take test snapshots, mirror view, and inspect camera hardware capabilities.

Watch animated animals race to the finish

Spin the wheel to pick random choices

Check current weather and 5-day forecast for any location