# FreeToolbox.kr > FreeToolbox is a collection of 130+ free browser-based online tools. All processing happens locally — no server upload, no signup, 100% private. Categories include image editing, text processing, developer utilities, calculators, QR generators, Korean-specific tools, and fun/viral tools. ## Image Tools - [Image Compressor](https://freetoolbox.kr/image-compressor): Compress JPG, PNG, WebP images in browser. Reduce file size without quality loss. - [Image Resizer](https://freetoolbox.kr/image-resizer): Resize photos to exact dimensions or percentage. Maintains aspect ratio. - [Image Converter](https://freetoolbox.kr/image-converter): Convert between PNG, JPG, WebP, GIF formats instantly. - [Image Cropper](https://freetoolbox.kr/image-cropper): Crop photos with custom or preset aspect ratios. - [Image Rotate & Flip](https://freetoolbox.kr/image-rotate): Rotate images 90/180/270 degrees or flip horizontally/vertically. - [Image Watermark](https://freetoolbox.kr/image-watermark): Add text or image watermarks to protect photos. - [Image to Base64](https://freetoolbox.kr/image-to-base64): Convert images to Base64 encoded strings for embedding. - [Base64 to Image](https://freetoolbox.kr/base64-to-image): Decode Base64 strings back to downloadable images. - [GIF Maker](https://freetoolbox.kr/gif-maker): Create animated GIFs from multiple images with timing control. - [Image Color Picker](https://freetoolbox.kr/image-color-picker): Extract exact HEX, RGB, HSL colors from any uploaded photo. - [Favicon Generator](https://freetoolbox.kr/favicon-generator): Create ICO favicons from any image for websites. - [Screenshot Beautifier](https://freetoolbox.kr/screenshot-beautifier): Add backgrounds, shadows, and frames to screenshots. - [Image Blur](https://freetoolbox.kr/image-blur): Apply gaussian blur effects to images or specific areas. - [SVG to PNG](https://freetoolbox.kr/svg-to-png): Convert SVG vector files to PNG raster images at any resolution. - [Photo Collage Maker](https://freetoolbox.kr/collage-maker): Combine multiple photos into a single collage layout. ## Text Tools - [Character Counter](https://freetoolbox.kr/character-counter): Count characters, words, sentences, and paragraphs in real-time. - [Invisible Text Generator](https://freetoolbox.kr/invisible-text): Generate invisible blank space characters for copy-paste. - [Text Case Converter](https://freetoolbox.kr/text-case-converter): Convert text between UPPERCASE, lowercase, Title Case, and more. - [Lorem Ipsum Generator](https://freetoolbox.kr/lorem-ipsum): Generate placeholder dummy text for design mockups. - [Text Diff Checker](https://freetoolbox.kr/text-diff): Compare two texts side-by-side and highlight differences. - [Text Repeater](https://freetoolbox.kr/text-repeater): Repeat any text string multiple times with custom separator. - [Duplicate Line Remover](https://freetoolbox.kr/duplicate-remover): Remove duplicate lines from text, keeping unique entries. - [Text Line Sorter](https://freetoolbox.kr/text-sorter): Sort text lines alphabetically, numerically, or by length. - [Word Frequency Counter](https://freetoolbox.kr/word-frequency): Analyze word frequency and density in any text. - [Text to Speech](https://freetoolbox.kr/text-to-speech): Convert text to spoken audio using browser TTS engine. - [Speech to Text](https://freetoolbox.kr/speech-to-text): Transcribe voice to text using browser speech recognition. - [Markdown Previewer](https://freetoolbox.kr/markdown-preview): Write and preview Markdown with live rendering. - [Find & Replace](https://freetoolbox.kr/text-replace): Find and replace text with regex support. - [Text Reverser](https://freetoolbox.kr/text-reverse): Reverse text, words, or sentences. - [Fancy Text Generator](https://freetoolbox.kr/fancy-text): Generate stylish Unicode text fonts for social media. ## Developer Tools - [Color Code Converter](https://freetoolbox.kr/color-converter): Convert between HEX, RGB, HSL color formats. - [JSON Formatter](https://freetoolbox.kr/json-formatter): Format, validate, and beautify JSON data. - [URL Encoder/Decoder](https://freetoolbox.kr/url-encoder): Encode or decode URL percent-encoded strings. - [HTML Entity Converter](https://freetoolbox.kr/html-entity): Encode/decode HTML special characters and entities. - [Base64 Encoder/Decoder](https://freetoolbox.kr/base64-encoder): Encode text to Base64 or decode Base64 to text. - [Hash Generator](https://freetoolbox.kr/hash-generator): Generate MD5, SHA-1, SHA-256, SHA-512 hashes. - [Regex Tester](https://freetoolbox.kr/regex-tester): Test regular expressions with live matching and group highlighting. - [Unix Timestamp Converter](https://freetoolbox.kr/unix-timestamp): Convert between Unix epoch timestamps and human-readable dates. - [CSS Minifier](https://freetoolbox.kr/css-minifier): Minify CSS code by removing whitespace and comments. - [JavaScript Minifier](https://freetoolbox.kr/js-minifier): Compress JavaScript code for faster page loading. - [HTML Minifier](https://freetoolbox.kr/html-minifier): Minify HTML by removing unnecessary whitespace. - [CSS Gradient Generator](https://freetoolbox.kr/css-gradient): Visual editor for CSS linear and radial gradients. - [CSS Box Shadow Generator](https://freetoolbox.kr/css-shadow): Visual editor for CSS box-shadow with live preview. - [Meta Tag Generator](https://freetoolbox.kr/meta-tag-generator): Generate SEO meta tags, Open Graph, and Twitter Card tags. - [Open Graph Preview](https://freetoolbox.kr/og-preview): Preview how URLs appear when shared on social media. - [Robots.txt Generator](https://freetoolbox.kr/robots-txt): Generate robots.txt files for search engine crawling control. - [.htaccess Generator](https://freetoolbox.kr/htaccess-generator): Generate Apache .htaccess rules for redirects and caching. - [JWT Decoder](https://freetoolbox.kr/jwt-decoder): Decode and inspect JSON Web Token payloads and headers. ## Security & Password Tools - [Password Generator](https://freetoolbox.kr/password-generator): Generate strong random passwords with custom rules. - [Password Strength Checker](https://freetoolbox.kr/password-strength): Test password strength and get improvement suggestions. - [UUID Generator](https://freetoolbox.kr/uuid-generator): Generate random UUID v4 identifiers. - [Random Number Generator](https://freetoolbox.kr/random-number): Generate random numbers within custom ranges. - [Text Encryption](https://freetoolbox.kr/encryption-tool): Encrypt and decrypt text using AES-256 in the browser. ## Data & Conversion Tools - [CSV to JSON](https://freetoolbox.kr/csv-to-json): Convert CSV data to JSON format. - [JSON to CSV](https://freetoolbox.kr/json-to-csv): Convert JSON arrays to CSV spreadsheet format. - [CSV Viewer](https://freetoolbox.kr/csv-viewer): Open and browse CSV files with sortable columns. - [XML to JSON](https://freetoolbox.kr/xml-to-json): Convert XML data to JSON format. - [YAML to JSON](https://freetoolbox.kr/yaml-to-json): Convert YAML to JSON and vice versa. - [Number Base Converter](https://freetoolbox.kr/number-base): Convert between binary, octal, decimal, and hexadecimal. - [Unit Converter](https://freetoolbox.kr/unit-converter): Convert length, weight, temperature, and other units. - [Currency Converter](https://freetoolbox.kr/currency-converter): Convert currencies with live exchange rates. - [Timezone Converter](https://freetoolbox.kr/timezone-converter): Convert times between world time zones. - [My IP Address](https://freetoolbox.kr/ip-lookup): Check your public IP address and basic geolocation. ## QR & Barcode Tools - [WiFi QR Generator](https://freetoolbox.kr/wifi-qr): Generate QR codes for sharing WiFi credentials. - [QR Code Generator](https://freetoolbox.kr/qr-generator): Create QR codes for URLs, text, contacts, and more. - [QR Code Reader](https://freetoolbox.kr/qr-reader): Scan QR codes from images or camera. - [Barcode Generator](https://freetoolbox.kr/barcode-generator): Generate EAN, UPC, Code128, and other barcode formats. - [vCard QR Generator](https://freetoolbox.kr/vcard-qr): Create QR codes for digital business cards. ## Calculators - [BMI Calculator](https://freetoolbox.kr/bmi-calculator): Calculate Body Mass Index from height and weight. - [Age Calculator](https://freetoolbox.kr/age-calculator): Calculate exact age in years, months, and days. - [D-Day Counter](https://freetoolbox.kr/dday-counter): Count days between two dates or until a target date. - [Percentage Calculator](https://freetoolbox.kr/percentage-calc): Calculate percentages, increases, and decreases. - [Tip Calculator](https://freetoolbox.kr/tip-calculator): Calculate tip amounts and split bills between people. - [Loan Calculator](https://freetoolbox.kr/loan-calculator): Calculate monthly payments, interest, and amortization. - [Discount Calculator](https://freetoolbox.kr/discount-calc): Calculate sale prices after percentage discounts. - [Speed Calculator](https://freetoolbox.kr/speed-calc): Calculate speed, distance, or time from two known values. - [Calorie Calculator](https://freetoolbox.kr/calories-calc): Calculate daily calorie needs based on TDEE and BMR. - [GPA Calculator](https://freetoolbox.kr/gpa-calculator): Calculate college GPA from course grades and credits. ## Time & Date Tools - [Stopwatch](https://freetoolbox.kr/stopwatch): Online stopwatch with lap timing. - [Countdown Timer](https://freetoolbox.kr/timer): Set countdown timers with alarm notification. - [Pomodoro Timer](https://freetoolbox.kr/pomodoro): Focus timer using 25/5 minute Pomodoro technique. - [Date Difference](https://freetoolbox.kr/date-diff): Calculate the number of days between two dates. ## Design & Creative Tools - [Color Palette Generator](https://freetoolbox.kr/color-palette): Generate harmonious color schemes and palettes. - [Gradient Maker](https://freetoolbox.kr/gradient-maker): Create CSS gradients with visual color picker. - [Pixel Art Editor](https://freetoolbox.kr/pixel-art): Draw pixel art on a grid canvas with export options. - [Emoji Picker](https://freetoolbox.kr/emoji-picker): Search and copy emojis by name or category. - [Font Pairing Tool](https://freetoolbox.kr/font-pairing): Preview Google Font combinations for web design. ## Utility Tools - [Online Notepad](https://freetoolbox.kr/notepad): Simple text editor that saves to browser storage. - [Online Whiteboard](https://freetoolbox.kr/whiteboard): Free drawing board with brush tools and export. - [Coin Flip](https://freetoolbox.kr/coin-flip): Flip a virtual coin with animated results. - [Dice Roller](https://freetoolbox.kr/dice-roller): Roll virtual dice with multiple die types. - [Decision Wheel](https://freetoolbox.kr/decision-wheel): Spin a wheel to make random decisions. - [Typing Speed Test](https://freetoolbox.kr/typing-speed): Test typing speed in words per minute. - [Screen Ruler](https://freetoolbox.kr/screen-ruler): Measure pixels on screen with a draggable ruler. - [Aspect Ratio Calculator](https://freetoolbox.kr/aspect-ratio): Calculate aspect ratios for video and images. - [Placeholder Image](https://freetoolbox.kr/placeholder-image): Generate placeholder images with custom size and text. - [Browser Info](https://freetoolbox.kr/browser-info): Detect your browser, OS, screen resolution, and more. ## Korean Tools (한국 특화) - [Salary Calculator Korea](https://freetoolbox.kr/salary-calculator): Calculate take-home salary after taxes and deductions in Korea. - [Severance Pay Calculator](https://freetoolbox.kr/severance-calc): Calculate severance pay (퇴직금) based on Korean labor law. - [Rent vs Jeonse Calculator](https://freetoolbox.kr/rent-vs-jeonse): Compare jeonse deposit vs monthly rent costs in Korea. - [Property Tax Calculator](https://freetoolbox.kr/property-tax): Calculate property acquisition tax (취득세) in Korea. - [Income Tax Calculator](https://freetoolbox.kr/income-tax): Calculate comprehensive income tax (종합소득세) in Korea. - [VAT Calculator Korea](https://freetoolbox.kr/vat-calculator): Calculate value-added tax (부가가치세) for Korean businesses. - [Business Registration Checker](https://freetoolbox.kr/business-reg-check): Validate Korean business registration numbers (사업자등록번호). - [Korean Age Calculator](https://freetoolbox.kr/korean-age): Convert between Korean age and international age. - [Korean Character Counter](https://freetoolbox.kr/hangul-counter): Count Korean characters, bytes, and words with Hangul support. - [Military Discharge Calculator](https://freetoolbox.kr/military-calc): Calculate Korean military discharge date (전역일). - [Subway Fare Calculator](https://freetoolbox.kr/subway-fare): Calculate Seoul subway fare between stations. - [Parcel Tracking Korea](https://freetoolbox.kr/parcel-tracker): Track parcels from Korean delivery services. - [Hanja Converter](https://freetoolbox.kr/hanja-converter): Convert between Hanja (Chinese characters) and Hangul. - [Lotto Number Generator](https://freetoolbox.kr/lotto-generator): Generate random Korean Lotto 6/45 numbers. ## Fun & Viral - [Random Name Generator](https://freetoolbox.kr/name-generator): Generate random names for testing and creative projects. - [Team Name Generator](https://freetoolbox.kr/team-name): Generate creative team and group name ideas. - [Nickname Generator](https://freetoolbox.kr/nickname-gen): Generate cool usernames and nicknames. - [Love Calculator](https://freetoolbox.kr/love-calc): Fun compatibility calculator based on names. - [Quick MBTI Test](https://freetoolbox.kr/mbti-test): Quick personality type test based on MBTI framework. - [Reaction Time Test](https://freetoolbox.kr/reaction-time): Test your reaction speed and reflexes. - [Click Counter](https://freetoolbox.kr/click-counter): Count clicks or taps with a simple counter. - [CPS Test](https://freetoolbox.kr/cps-test): Measure your clicks per second speed. - [Fortune Cookie](https://freetoolbox.kr/fortune-cookie): Get a random fortune cookie message. - [Would You Rather](https://freetoolbox.kr/would-you-rather): Fun "would you rather" question game. - [Truth or Dare](https://freetoolbox.kr/truth-or-dare): Random truth or dare question generator for parties. - [Baby Name Generator](https://freetoolbox.kr/baby-name): Browse popular baby names with meaning and origin. - [Keyboard Tester](https://freetoolbox.kr/keyboard-tester): Test every key on your keyboard. - [Microphone Test](https://freetoolbox.kr/mic-test): Test your microphone with visual audio feedback. ## About - [About FreeToolbox](https://freetoolbox.kr/about): About the project and contact information. - [Privacy Policy](https://freetoolbox.kr/privacy): Privacy policy — all data processed locally, no server storage.