All Tools

Tools List by Category

• Percentage Calculator - Find what percentage a part is of a whole, or calculate a percentage of a value.
• Discount Calculator - Enter the original price and discount rate to find the final price and the amount saved.
• Ratio Calculator - Simplify the ratio of two values, or solve for the unknown in a proportion.
• Pyeong Area Converter - Convert apartment and office area between pyeong, square meters (m²), and square feet (ft²).
• Unit Converter - Freely convert units of length, weight, temperature, area, and volume.
• VAT Calculator - Calculate 10% VAT from either the supply price or the total amount.
• Average Calculator - Calculate the average, maximum, minimum, and sum of a list of numbers.
• Percentage Change Calculator - Enter a previous and current value to calculate the rate of increase or decrease.
• Goal Achievement Calculator - Enter a target and current value to see the achievement rate (%) and the amount remaining.
• Rounding Calculator - Round, round up, or round down a number to a chosen number of digits.
• Split the Bill Calculator - Enter a total amount and the number of people to calculate the amount per person.
• Margin & Cost Calculator - Calculate the margin from cost and selling price, or find the price from a target margin.
• Reverse Percentage Calculator - Work back to the original value from a result and its percentage.
• Price Increase/Decrease Calculator - Enter the current price and a change rate (%) to find the new price and the amount changed.
• Break-Even Point Calculator - Calculate the break-even quantity from fixed costs, variable costs, and selling price.
• Fee Calculator - Calculate the net amount after payment and platform fees.
• Exchange Rate Memo Calculator - Enter an exchange rate yourself to convert between local and foreign currency.
• Hourly Wage Calculator - Calculate the hourly wage from monthly salary, workdays, and work hours.
• CAGR Calculator - Calculate the compound annual growth rate from start value, end value, and period.
• ROI Calculator - Enter investment and return amounts to calculate profit, ROI, and the return multiple at once.
• PPI Calculator - Calculate pixel density (PPI) and dot pitch from screen diagonal size and resolution.
• Date Difference Calculator - Calculate the number of days between two dates, or the date N days from a reference date.
• D-Day Calculator - Show the days remaining until, or elapsed since, a target date based on today.
• Age Calculator - Calculate your exact age, this year's birthday status, and days until your next birthday.
• Time Calculator - Add or subtract time from a clock time, and calculate the interval between two times.
• Timestamp Converter - Convert Unix timestamps to readable dates and dates back to Unix timestamps.
• Months Between Dates Calculator - Calculate total months, days, and a year/month/day breakdown between two dates.
• Day of the Week Calculator - Find the day of the week for a date and its day difference from today.
• Leap Year Checker - Check whether a year is a leap year and how many days February has that year.
• Stopwatch - Measure time in milliseconds and record lap times.
• Countdown Timer - A countdown timer that alerts you when the set time reaches zero.
• Pomodoro Timer - A timer with 25-minute focus and 5-minute break cycles to boost concentration.
• Character Counter - Count characters with and without spaces, and line count, in real time.
• Byte Counter - Calculate the byte length of text when stored as UTF-8.
• Case Converter - Convert text, variable names, and filenames to UPPER, camelCase, snake_case, kebab-case, and more.
• Whitespace Remover - Remove whitespace in various ways — leading/trailing, duplicate, or per-line.
• Duplicate Line Remover - Remove duplicate lines from text, keeping only unique lines.
• Line Sorter - Sort each line of text in ascending/descending order, or shuffle randomly.
• Markdown Preview - Render Markdown in real time and provide an HTML preview.
• Random String Generator - Generate a random string with a chosen length and character set.
• Word Counter - Calculate word count, unique word count, and sentence count of text.
• Line Counter - Count total lines, empty lines, content lines, and the longest line length.
• Text Compare - Compare two texts line by line to show added, removed, and identical lines.
• Slug Generator - Convert a title or sentence into a URL-friendly slug string.
• List Converter - Convert between a comma-separated list and a line-based list.
• Line Number Add/Remove - Add numbers to each line of text, or remove existing line numbers.
• Text Reverser - Reverse text character by character, or reverse the order of lines.
• Random Order Shuffler - Shuffle the line order of a list randomly for draws, ordering, and random sorting.
• Quote Converter - Convert between straight quotes and smart (curly) quotes.
• Bracket Remover - Remove various brackets — parentheses, square, and curly — from text.
• Punctuation & Whitespace Cleaner - Tidy punctuation and whitespace — duplicate spaces, consecutive blank lines, and per-line edges.
• Lorem Ipsum Generator - Generate Lorem Ipsum placeholder text for design mockups and development testing.
• Text Template Filler - Replace {variable} placeholders with your values in bulk.
• Text Extractor - Automatically find and extract emails, URLs, phone numbers, and numbers from text.
• Markdown Table Generator - Set columns and rows and enter content to generate Markdown table syntax instantly.
• Special Character Table - Copy common special characters — math, arrows, currency, punctuation — with one click.
• Emoji Picker - Click category-organized emoji — smileys, animals, food, travel — to copy instantly.
• Korean/English Typo Converter - Fix Korean text mistyped on an English keyboard layout, or vice versa.
• ASCII Art Generator - Convert text into ASCII art made of block characters.
• Markdown Table of Contents Generator - Analyze Markdown headings (#, ##, ###) to auto-generate a linked table of contents.
• Markdown Anchor Link Generator - Convert heading text into a GitHub-style anchor link.
• Checklist Converter - Convert a plain line list into a Markdown checklist (- [ ] item) format.
• Prefix/Suffix Adder - Add a prefix (front) and suffix (back) string to each line in bulk.
• Line Filter - Filter lines of text by keyword include/exclude conditions.
• Random Line Picker - Randomly pick a specified number of lines from multi-line text.
• Text Masking Tool - Mask parts of personal data such as emails, phone numbers, and names with *.
• Korean Particle (Josa) Helper - Analyze the final consonant of a word to auto-select the right Korean particle (eun/neun, i/ga, eul/reul, gwa/wa).
• Korean Initial Consonant Extractor - Extract the leading consonant of each character from Korean text.
• Hangul Jamo Splitter/Combiner - Split Hangul into initial/medial/final jamo, or recombine separated jamo into complete Hangul.
• Forbidden Word Checker - Find and highlight forbidden words in text based on a user-provided list.
• Text Highlighter - Highlight multiple keywords in text and see found keywords and match counts in real time.
• Invisible Character Detector - Find, show, and clean invisible characters like zero-width spaces, full-width spaces, and BOM.
• URL Encode / Decode - Encode text into URL-safe form (%XX) or decode an encoded URL back to text.
• Base64 Converter - Encode text to Base64 or decode a Base64 string back to text.
• Image Resizer - Resize multiple images in the browser with aspect ratio kept, no server upload.
• Image Cropper - Enter pixel coordinates to crop just the area you need, in the browser.
• Image Rotate / Flip - Rotate images in 90-degree steps or flip them horizontally/vertically.
• Image Compressor - Reduce image file size in the browser by adjusting quality and max size.
• Image Format Converter - Convert PNG, JPG, and WebP images to each other in the browser.
• Favicon Generator - Generate multiple favicon and app-icon PNG sizes from a source image.
• Image Color Extractor - Analyze image pixels in the browser to extract the main color HEX codes.
• Image to Base64 Converter - Convert an image file into a Data URL Base64 string, no server upload.
• Base64 → Image Preview - Instantly preview a Data URL Base64 string as an image.
• Image Metadata Remover - Make a new image with original metadata like EXIF removed via Canvas re-encoding.
• Image Watermark - Add a text or logo watermark over an image with adjustable position and opacity.
• Image Mosaic / Blur - Blur sensitive areas like faces, names, and addresses in photos/screenshots, in the browser.
• Image Rounded Corners - Generate a transparent-background PNG with rounded image corners.
• Add Image Padding - Add padding of a chosen color around an image.
• Image Grid Maker - Combine multiple images into one PNG in a grid layout.
• Before/After Image Maker - Combine two images into a side-by-side or stacked comparison image.
• OG Image Generator - Generate a 1200×630 share image from a title, subtitle, and colors.
• Thumbnail Generator - Make a simple 1280×720 thumbnail image from text and a background color.
• Image Pixelate Tool - Process an image in blocks for a pixel-art look and save as PNG.
• Image Tint Tool - Apply a color overlay or tint to an image.
• Solid Color Image Generator - Generate a solid-color PNG image from a color and size.
• Gradient Image Generator - Generate a gradient PNG image from two colors and a direction.
• SVG Preview - Render SVG code as an image in the browser to preview it.
• SVG Minifier - Clean up comments and unnecessary whitespace in an SVG string.
• SVG Color Replacer - Bulk-replace fill/stroke color values in SVG code with a chosen color.
• SVG Background Pattern Generator - Generate repeating background patterns (dots, stripes, grid) as SVG code for web backgrounds.
• SVG → PNG Converter - Render SVG code on Canvas and save it as a PNG image.
• HTML Escape / Unescape - Convert HTML special characters to entities, and restore entity strings back to characters.
• Color Code Converter - Convert HEX, RGB, RGBA, HSL, HSLA color codes to each other and preview the color.
• File Size Converter - Convert Byte, KB, MB, GB, TB file size units on a 1000 or 1024 basis.
• YAML ↔ JSON Converter - Convert YAML and JSON data bidirectionally in the browser.
• Markdown → HTML Converter - Convert a Markdown document to HTML with a rendered preview.
• CSV ↔ JSON Converter - Convert CSV and JSON array data bidirectionally.
• CSV ↔ Markdown Table Converter - Convert CSV data into a Markdown table, or a Markdown table back into CSV.
• Image to PDF Converter - Convert JPG/PNG/WebP images into a PDF.
• PDF to Image Converter - Convert PDF pages into PNG/JPG images.
• PDF Merge - Combine multiple PDF files into one document in the selected order.
• PDF Split - Split a PDF by page into individual files for each page.
• PDF Page Extractor - Select only the pages you want and save them as a new PDF.
• PDF Page Remover - Make a new PDF from the remaining pages after excluding selected ones.
• PDF Page Rotator - Rotate wrongly oriented PDF pages by 90, 180, or 270 degrees.
• TSV ↔ CSV Converter - Convert tab-separated data (TSV) and comma-separated CSV to each other.
• JSON Flatten Converter - Flatten nested JSON into a flat key-value structure.
• JSON Schema Generator - Generate a JSON Schema draft from a JSON sample.
• TOML ↔ JSON Converter - Convert TOML config and JSON data bidirectionally in the browser.
• INI ↔ JSON Converter - Convert INI config files and JSON data to each other.
• Excel Paste → Markdown - Convert table-form text into a Markdown table.
• Markdown Table → HTML - Convert a Markdown table into an HTML table.
• CSS Unit Converter - Convert px, rem, em, %, vw, and vh.
• Query String ↔ JSON Converter - Convert URL query strings and JSON objects bidirectionally.
• JSON ↔ TypeScript Type Converter - Convert between JSON samples and TypeScript type declarations to draft types and sample JSON.
• HTML → JSX Converter - Convert HTML markup into the attribute names and style format used in React JSX.
• px ↔ rem Converter - Convert px and rem values bidirectionally based on a root font size.
• Date Format Converter - Convert date and time into YYYY-MM-DD, ISO 8601, UTC, and Unix timestamp formats.
• Unicode Converter - Convert a character to its Unicode code point (U+XXXX), or a code point to a character.
• ASCII Code Converter - Convert between characters and ASCII codes (decimal/hex/binary).
• Number Base Converter - Convert between binary, octal, decimal, and hexadecimal.
• Roman Numeral Converter - Convert between Arabic numbers and Roman numerals (I, V, X, L, C, D, M).
• Hash Generator - Convert text into SHA-1, SHA-256, and SHA-512 hashes.
• Caesar Cipher - Encrypt and decrypt text with a Caesar cipher that shifts letters by a set amount.
• HTML → Text Extractor - Remove HTML tags and cleanly extract only the body text.
• HTML → Markdown Converter - Convert HTML markup to Markdown syntax — headings, lists, tables, and code blocks.
• CSV → SQL INSERT Generator - Convert CSV data into SQL INSERT statements ready to load into a table.
• XML ↔ JSON Converter - Convert XML and JSON data bidirectionally, preserving attributes and text.
• Markdown → Plain Text Converter - Remove Markdown syntax symbols and leave only pure plain text.
• SVG Data URI Converter - Convert SVG code into a Data URI usable directly in CSS and HTML.
• Code to Image Generator - Turn a code snippet into a PNG image for sharing on social media and documents.
• Image Aspect Ratio Calculator - Calculate the ratio from image width/height and find a ratio-preserving size.
• JSON Formatter - Beautify or minify JSON strings instantly and check for validity errors.
• UUID Generator - Generate up to 20 cryptographically secure UUID v4 values at once.
• Password Generator - Generate secure random passwords in the browser by choosing length, character set, and count.
• JWT Decoder - Decode a JWT header and payload to view the JSON and key claims.
• Regex Tester - Enter a regex pattern to see matches in text in real time.
• QR Code Generator - Convert text or a URL into a QR code and download it as an image.
• Wi-Fi QR Code - Make a QR code from Wi-Fi network info so guests can connect easily.
• UTM Parameter Builder - Add UTM parameters to a URL to build a marketing campaign tracking link.
• CSS vw Unit Converter - Convert px to viewport-width vw units, or the reverse.
• CSS clamp() Generator - Auto-generate a CSS clamp() function from min/max values and a viewport range.
• Color Palette Picker - Pick a color and view its HEX, RGB, HSL values plus complementary and analogous colors.
• SQL Formatter - Neatly align SQL queries by keywords and clauses.
• HTML Formatter - Tidy HTML markup with consistent indentation and line breaks.
• CSS Formatter - Neatly align CSS code by rules and properties.
• JavaScript Formatter - Tidy JavaScript code for readability using Prettier rules.
• JS/CSS Minifier - Minify JavaScript and CSS code by removing whitespace and applying minify rules.
• XML Formatter - Parse an XML document and indent it by hierarchy.
• YAML Formatter - Tidy a YAML document with consistent indentation and line breaks.
• Code Diff Tool - Compare two code or text inputs line by line to show additions and deletions.
• Cron Expression Generator - Generate a cron expression by combining minute, hour, day, month, and weekday values.
• Cron Next Run Calculator - Calculate the next run times of a cron expression based on the current time.
• HTTP Status Code Lookup - Quickly look up the name and meaning of an HTTP status code.
• MIME Type Lookup - Quickly find file extensions and MIME types.
• Keyboard Event Inspector - Instantly check the key, code, and modifier values of a key press event.
• User-Agent Analyzer - Extract browser, OS, and device info from a User-Agent string.
• Regex Replace Tester - Apply a regex pattern and replacement value to see the result.
• JSONPath Tester - Extract values from JSON data using a JSONPath expression.
• CSS box-shadow Generator - Adjust shadow values with sliders and generate box-shadow CSS.
• CSS border-radius Generator - Check rounded-corner values with a preview and generate border-radius CSS.
• CSS gradient Generator - Adjust colors and angle to generate linear-gradient CSS.
• CSS easing Generator - Adjust cubic-bezier values to generate a CSS easing function.
• Flexbox Generator - Adjust flex-direction, justify-content, align-items, and gap to generate Flexbox CSS.
• Grid Generator - Adjust columns, gap, and item count to generate CSS Grid layout code.
• z-index Organizer - Enter names and z-index values per line and sort from lowest to highest.
• cURL → fetch Converter - Convert a cURL command into JavaScript fetch code.
• fetch → axios Converter - Convert fetch code into the axios request format.
• HTTP Header Parser - Parse a header string into key-value form.
• .env Sorter - Sort keys in a .env file and find duplicate keys.
• package.json Viewer - Neatly organize scripts, dependencies, and devDependencies.
• semver Comparator - Compare two semantic versions and interpret version range notation.
• Gitignore Generator - Generate gitignore templates by language/framework.
• Dockerfile Formatter - Tidy Dockerfile commands and present the structure clearly.
• Docker Compose Formatter - Neatly tidy docker-compose YAML.
• URL Parser - Break a URL into protocol, host, path, and query.
• User-Agent Generator - Generate User-Agent strings for testing.
• API Latency Summary - Calculate the mean, p95, and p99 of a list of response times.
• GraphQL Formatter - Tidy GraphQL queries and mutations.
• GraphQL Variable Merger - Merge a GraphQL query and variables JSON into an API request body.
• SQL IN Clause Generator - Convert a line list into a SQL IN (…) form.
• JSON Mock Data Generator - Generate a sample JSON array based on field definitions.
• CSS text-shadow Generator - Adjust X/Y offset, blur, color, and opacity to make CSS text-shadow code.
• CSS filter Generator - Generate CSS filter values like blur, brightness, contrast, and grayscale with a preview.
• Color Shades Palette Generator - Generate a 50–950 Tailwind-style shade palette from one base HEX color.
• Meta / OG Tag Generator - Generate title, description, canonical, OG, and Twitter Card meta tag HTML.
• JSON → Table Converter - Convert a JSON object array into a rows-and-columns table and export to CSV.
• JSON Tree Viewer - Show JSON data as a collapsible/expandable tree structure.
• CSS Specificity Calculator - Calculate and compare the specificity score of CSS selectors.
• Git Branch Name Generator - Convert a task title into a name following Git branch naming conventions.
• Ladder Game - Enter participants and result items to connect them randomly.
• Spin Wheel Picker - Pick one item randomly from a candidate list like a spinning wheel.
• Dice Roller - Set the number of sides and dice to generate random results and a total.
• Coin Flip - Generate heads/tails results once or several times.
• Random Name Picker - Randomly draw names from a participant list without duplicates.
• Random Team Generator - Shuffle a participant list and split by team count or members per team.
• Random Menu Picker - Randomly recommend what to eat today from a menu candidate list.
• Random Color Generator - Randomly generate HEX and RGB color codes with a preview.
• Random Date Generator - Generate random dates within a start and end date range.
• Passphrase Generator - Generate an easy-to-remember passphrase by combining words.
• Random ID Generator - Create unique ID strings by choosing a prefix, length, and character type.
• Random Nickname Generator - Generate Korean-style nicknames by combining adjectives and animal nouns.
• Random Sentence Generator - Generate random Korean sentences by type, such as daily chat, business, or greetings.
• Random Coordinate Generator - Generate random latitude and longitude values from presets or a custom range.
• Random Date List Generator - Generate multiple random dates within a date range, with duplicate and sorting options.
• Random Color Palette Generator - Generate harmonious color palettes using color-theory rules.
• Number Wheel Picker - Set a number range and draw one number with a roulette-style animation.
• Random Order Generator - Shuffle a participant list to decide presentation order, duty order, or turn order.
• Lotto Number Generator - Generate six random numbers from 1 to 45 plus a bonus number.
• Random Number Picker - Draw random numbers from a range with count and duplicate options.
• Fuel Cost Calculator - Estimate fuel cost from driving distance, fuel economy, and fuel price.
• Electricity Bill Calculator - Estimate a monthly electricity bill from power consumption in kWh.
• Battery Runtime Calculator - Estimate runtime from battery capacity in mAh and device current draw.
• Tip Calculator - Calculate tip amount, total payment, and per-person split from a bill and tip rate.
• Book Spine Thickness Calculator - Calculate printed book spine thickness from page count and paper thickness.
• Box Volume Calculator - Calculate box volume, surface area, and shipping dimensional weight from width, depth, and height.
• Pet Age Calculator - Convert dog or cat age into an approximate human-age equivalent.
• BMI Calculator - Calculate body mass index and a normal-weight range from height and weight.
• BMR Calculator - Estimate daily basal metabolic rate from sex, age, height, and weight.
• Calorie Calculator - Estimate maintenance, weight-loss, and weight-gain calories from BMR and activity level.
• Water Intake Calculator - Estimate daily water intake from body weight and a per-kg hydration rule.
• Caffeine Intake Calculator - Add up caffeine from drinks and compare daily intake against common guidance limits.
• Walking Calorie Calculator - Estimate calories burned from walking based on weight, distance, and pace.
• Running Pace Calculator - Calculate pace from distance and time, or estimate finish time from pace.
• Moving Box Calculator - Estimate how many moving boxes you need from home size, room count, and packing density.
• Food Storage Memo - Record food items, storage places, and dates to estimate expiration or use-by reminders.
• Tire Pressure Converter - Convert tire pressure between psi, bar, and kPa and compare common vehicle presets.
• Screen Size Compare - Compare display sizes by diagonal, aspect ratio, width, height, and screen area.
• Travel Budget Splitter - Split travel expenses by people and categories to estimate each person's share.
• Checklist Generator - Create a practical checklist from a topic or item list for trips, moving, shopping, or tasks.
• Annual Leave Calculator - Estimate accrued annual leave days from a hire date and a reference date (simplified).
• Severance Pay Calculator - Estimate severance pay from the last three months of wages and length of service (simplified).
• Net Salary Calculator - Estimate net take-home pay from gross salary, non-taxable amount, deduction rate, and income tax.
• Pregnancy Week Calculator - Calculate the pregnancy week and due date from the last menstrual period (LMP).
• Ovulation Calculator - Estimate ovulation day and the fertile window from the last period and average cycle.
• World Clock Converter - Convert a given date and time to the local time of major cities and time zones at once.
• Time Zone Converter - Convert a chosen date and time to another time zone's representation.
• Business Day Calculator - Calculate a date N business days out or the number of business days, excluding weekends.
• Week Number Calculator - Find which week of the year a date falls in, based on ISO 8601.
• Date Range Generator - Generate a list of all dates between a start and end date at once.
• Meeting Time Finder - Find times where working hours overlap across multiple time zones.
• Date Add/Subtract Calculator - Add or subtract days, weeks, months, or years from a reference date.
• Work Hours Calculator - Calculate work hours from clock-in, clock-out, and break time.
• Sleep Time Calculator - Calculate recommended bedtimes aligned to 90-minute sleep cycles based on your wake time.
• Unix Millisecond Converter - Auto-detect 10-digit second and 13-digit millisecond timestamps and convert to date/time.
• Percentage Point Calculator - Calculate the difference between two percentage values as percentage points and relative change.
• Compound Interest Calculator - Calculate compound results from initial amount, monthly contribution, rate, and period.
• Loan Interest Calculator - Calculate monthly payment and total interest from loan principal, rate, term, and repayment method.
• Deposit Interest Calculator - Calculate the maturity amount from deposit, rate, term, and interest tax.
• Savings Interest Calculator - Calculate the maturity amount of a regular savings plan from monthly deposit, rate, term, and tax.
• Average Cost Calculator - Calculate a new average purchase price from existing holdings and an additional buy.
• Shoe Size Converter - Compare shoe sizes across Korea, US, UK, EU, Japan, and foot length.
• Ring Size Converter - Convert ring size between Korean, US, UK, EU, circumference, and diameter values.
• Clothing Size Converter - Compare clothing sizes across global, Korean, US, EU, and measurement-based standards.
• Cooking Unit Converter - Convert common cooking units such as cups, tablespoons, teaspoons, mL, and grams.
• Recipe Scaler - Scale recipe ingredient amounts by changing servings or applying a multiplier.
• Baking Pan Converter - Compare baking pan sizes and calculate batter scaling by pan area.
• Paint Calculator - Estimate paint amount from wall area, coverage, and number of coats.
• Tile Calculator - Estimate tile count and material cost from area, tile size, and waste rate.
• Wallpaper Calculator - Estimate wallpaper rolls from wall dimensions, roll size, and waste.
• Curtain Size Calculator - Estimate curtain width and length from window size, fullness, and hanging style.
• TV Viewing Distance Calculator - Estimate comfortable viewing distance from TV size and resolution.
• Furniture Fit Calculator - Check whether furniture can fit through doors, elevators, hallways, or room spaces.
• Alarm Clock - A simple alarm clock that runs in your browser and plays a synthesized beep.
• Leap Month Calculator - Check whether a lunar month is normal or leap, and find leap-month date ranges by year.
• Korean Zodiac Calculator - From a birth date, find the Korean zodiac sign by both Lunar New Year and Ipchun (solar term).
• Samjae Calculator - Determine Samjae (the three-year unlucky cycle) status from a zodiac sign and reference year.
• Zodiac Sign (Horoscope) Calculator - Find your Western zodiac sign from your solar birth date, with a personality summary.
• Korean Milestone Birthday Calculator - Calculate Korean traditional longevity celebration dates and D-days (Hwangap 60th, Chilsun 70th, etc.).
• 49-Day Memorial Calculator - Calculate Buddhist memorial dates from the first rite to the 49th-day rite, with weekdays and D-days.
• Sexagenary Cycle Calculator - Identify the sexagenary year, its symbolic animal and color, and trace years for a given cycle name.
• Hash Generator - Hash text with MD5, SHA-1, SHA-256, and SHA-512. Supports HEX and Base64 output.
• JSON Schema Validator - Validate JSON data against a JSON Schema (Draft-7) and show error locations as JSON Pointers.
• Barcode Generator - Generate Code 128 and EAN-13 barcodes in your browser and download them as PNG images.
• Chart Generator - Turn label/value data into bar, line, pie or doughnut charts and download them as SVG or PNG.
• Browser Info - See the browser, OS, device, screen and locale details your browser reports — all locally.
• RSA Calculator - Derive an RSA key (n, φ, d) from two primes and a public exponent, and walk through encryption/decryption. For learning only.
• API Key Generator - Generate cryptographically secure random API keys in Base62, Hex, Base64URL or UUID formats, entirely in your browser.
• XML Validator - Check whether XML is well-formed, view error messages, and get a tidy indented version.
• YAML Validator - Validate YAML syntax, show error line/column positions, and preview the parsed JSON.
• Subtitle Converter - Convert subtitles between SRT, WebVTT, SMI (SAMI) and plain text, with optional time shifting.
• IEEE 754 Floating Point Converter - Break a decimal number into 32-bit and 64-bit IEEE 754, and decode hex/binary bit patterns back into numbers.