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JSON

JSON Formatter / Validator / Minifier JSON Tree Viewer JSON to CSV Converter JSON to XML Converter JSON to YAML Converter JSON Editor JSON Key Sorter JSON ↔ URL Query Converter Mock JSON Generator JSON to Code Generator JSON ↔ TOML Converter JSON5 ↔ JSON Converter

Time & Date

Timestamp Converter Cron Expression Parser World Clock / Time Zones Date / Time Difference Calculator Lunar / Solar Date Converter Workday Calculator Stopwatch Countdown Timer Almanac (万年历 / 老黄历)Date Calculator

Encode / Decode

Base64 Encode / Decode URL Encode / Decode Hash / MD5 / SHA Calculator Number Base Converter Unicode / ASCII / Hex Converter File / Image to Base64 Morse Code Encode / Decode Morse Code Audio Download Link Converter Base32 / Base58 / Base62 Encoder Character Code / ASCII Table

Generators

UUID / GUID Generator QR Code Generator Color Picker & Palette Lottie Animation Previewer Random Password Generator Barcode Generator Lorem Ipsum Generator Random Picker / Wheel Font Awesome Icon Search Color Contrast Checker (WCAG)Daily Trending Color Scheme Generator Coupon / Activation Code Generator Online Sticky Notes Shield Badge Generator Lottery Wheel — Random Picker

Text Processing

Regular Expression Tester Variable Name Converter Text Diff Checker Text Processing Tool Email Validator URL Slug Generator Number to Words Translator ASCII Art Text ASCII Table Generator Text Dedup Keyword Density Analyzer English Abbreviations Text Utilities CSV Tools — CSV / JSON / TSV / Table Text Statistics LaTeX Formula Editor

Chinese Tools

Simplified ↔ Traditional Chinese Converter Forbidden Words Checker Chinese to Pinyin Converter Chinese Character Decomposer Homophone Pun Finder Acrostic Poem Generator Character & Word Counter Chinese ID Card Validator Baby Name Generator Typing Speed Test Chinese Surnames (百家姓)Idiom Dictionary & Chain Xiehouyu (歇后语)Special Symbols Synonyms & Antonyms Chinese Riddles (字谜灯谜)Classical Poems & 飞花令 Chinese Classics (国学启蒙)Famous Quotes (名言名句)Couplets (对联 / 春联)Area Code / ZIP / Plate Chinese Zodiac (十二生肖)Zodiac Signs (星座)Dream Interpretation (周公解梦)24 Solar Terms (二十四节气)

Docs & Sheets

Markdown Editor Online Spreadsheet PDF Tool — View, Merge, Split, Convert Rich Text Editor Word Document Editor CAD / DXF Viewer 3D CAD Viewer (STEP / IGES / BREP)CSV Viewer / Editor 2D CAD Editor (Draw + DXF)Grid Paper Printable Tian Zi Ge Generator Subtitle Converter

Whiteboard & Drawing

Whiteboard (Excalidraw)Drawing Pad Signature Pad Offline Whiteboard Mind Map XMind / Mind Map Editor draw.io Diagram Editor Online Slides (PPT)

Crypto

AES / DES / 3DES Encrypt & Decrypt RSA Encrypt / Decrypt & Key Pair JWT Decoder Cisco Type 7 Password PEM Certificate Viewer Hash Type Identifier RC4 Encrypt / Decrypt

CSS Tools

CSS Cubic Bezier Generator CSS Gradient Generator Glassmorphism Generator Neumorphism Generator Box / Text Shadow Generator Flexbox Layout Visualizer CSS Grid Layout Visualizer CSS Animation / @keyframes Generator CSS Gradient Text

Code Format

Code Formatter & Minifier Universal Code Tidy SQL Formatter & Beautifier XML Formatter & Validator GraphQL Formatter Code Highlighter HTML Entities Escape

Code Convert

curl to Code Converter HTML Live Preview Robots.txt Generator Sitemap.xml Generator SEO Meta Tag Generator HTML ↔ JS / JSX / PHP Converter JSON to Multi-Language

Web Dev & Debug

Keyboard KeyCode Finder Cookie / Header Parser HTTP Status Codes Reference MIME Type Lookup User-Agent Parser WebSocket Tester Punycode / IDN Converter Disk Partition Integer-Size Calculator Linux Command Reference XPath Tester Screen Pixel Ruler Regex Cheat Sheet API Tester

Security & Hash

JavaScript Obfuscator File Hash Calculator Magic Bytes / File Header Lookup htpasswd Generator CSR Generator Gzip Compress / Decompress Password Strength Checker

Image & Media Editing

Image Compressor SVG Formatter & Viewer Image Editor Online Photoshop (PS Editor)Photo Editor AI Background Remover Image Watermark Metronome Guitar Tuner Audio Cutter

Image Convert & Generate

Image Format Converter ICO Icon Maker Placeholder Image Generator Grid Image Slicer Festival Avatar Maker Meme Generator GIF Split / Extract Frames GIF Crop GIF Resize / Scale Color Palette Library CSS Sprites Generator Maze Generator Color Blindness Test

Network & IP

Subnet / IP Calculator Proxy Node Parser Magnet Link Parser / Generator IPv4 Address Converter IP / MAC Address Generator

Math Calculators

Scientific Calculator Fraction Calculator Fraction Reducer Percentage Calculator BMI Calculator Dice Roller Coin Flip Reaction Time Test Roman Numerals Converter RMB Currency Uppercase Chart Generator Number Format Sort Algorithm Visualizer GCD & LCM Calculator Permutation & Combination 24 Point Game BMR / TDEE Calculator GPA Calculator (4.0 Scale)Geometry Calculator (Area / Perimeter / Volume)Ratio Calculator — Solve Proportions A:B = C:D

Unit & Measurement

Unit Converter PPI Screen Density Calculator Data Storage Converter Geo Distance Calculator Standard Carton Size Calculator Paper Size Reference Size Chart Converter Voltage & Plug Reference Cooking Converter Temperature Converter Dilution Calculator (C1V1 = C2V2)

Finance & Reference

Personal Income Tax Calculator Mortgage Calculator Multi-Channel Timer Pomodoro Timer What To Eat Today Blood Type Inheritance Lookup Chinese Kinship Title Calculator Periodic Table of Elements Chinese Dynasties Timeline World Capitals Lookup China Universities Lookup Top-Level Domain (TLD) Lookup Handheld Danmu Banner Passport Number Validator Currency Amount in Words Compound Interest Bank Card BIN Lookup Number Fortune (81 数理)Loan Calculator (Equal Installment)Discount Calculator Fuel Cost Calculator Sales Tax / VAT Calculator Retirement Savings Calculator Rent / Lease Cost Calculator

Fitness & Weight Loss

MET Exercise Calorie Calculator Fat-Burn Follow-Along Workout

Lab & Learning

Multiplication Table Generator Arithmetic Worksheet Generator Triangle Solver (Sides, Angles, Area)Function Plotter Fraction Visualizer & Calculator (Pie / Bar + Operations)Binary Search Visualizer Pathfinding Algorithm Visualizer Stack Visualizer (LIFO)Queue Visualizer (FIFO)Singly Linked List Visualizer Flashcard Vocabulary Trainer Grammar Quiz — Multi-Language Multiple Choice Text Recitation & Cloze Tool (Blank-and-Fill)Dictation & Memorization Tool Ohm's Law Calculator (V = I × R)Circuit Simulator — Series & Parallel Resistors Optical Refraction Simulator (Snell's Law)Wave Visualizer Chemical Equation Balancer Frontend Interview Quiz Backend Interview Quiz — Multiple Choice Algorithm Interview Quiz — Multiple Choice System Design Interview Quiz Soft-Skills / Management Interview Trainer Sunrise / Sunset Calculator Coordinate Converter Resistor Color Code Reader (4 / 5 Band)pH Calculator — pH / pOH / [H⁺] / [OH⁻]Molar Mass Calculator DNA Sequence Tool — Transcription, Translation & Complement Electron Configuration Calculator Binary Tree Traversal Visualizer Binary Heap Visualizer (Max / Min Heap)Number Line Visualizer Probability & Statistics Calculator Regular Polygon Calculator Pendulum Period Simulator Punnett Square Calculator English Vocabulary Quiz — CET4 / CET6 / IELTS / TOEFL / SAT Conic Section Visualizer RLC Circuit Calculator (Resonant Frequency, Impedance, Q Factor)Convex Lens Imaging Simulator (Thin Lens)Lever Principle Calculator (F₁ × L₁ = F₂ × L₂)Probability Distribution Calculator — Normal / Binomial / Poisson Vector Calculator (2D / 3D)Complex Number Calculator (Add / Subtract / Multiply / Divide)Matrix Calculator (Add / Subtract / Multiply / Transpose / Determinant)Fourier Series Visualizer Newton's Laws Calculator (F = m·a + Gravitation)Graph Traversal Visualizer (BFS / DFS)Operating System Concepts Quiz — Multiple Choice Network Protocol Interview Quiz — Multiple Choice Numerical Integral Calculator Numerical Derivative & Tangent Line Calculator Differential Equation Solver (Euler / RK4)SQL Interview Quiz — Multiple-Choice Questions Set Theory & Venn Diagram Tool (Union, Intersection, Difference)Boolean Algebra — Truth Table & Logic Simplification Polynomial Root Finder Compiler Lexer Visualizer — Lexical Analysis of Source Code Prime Factorization & Prime Number Tool Kinetic / Potential / Mechanical Energy Calculator ER Diagram Builder (Database Entity-Relationship)Bitwise Calculator — AND / OR / XOR / NOT / Shift + Binary Visualization

🧰 Tools (160+) →Utilities →

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QR Code Generator

Create a QR code for any link or text and download it as PNG.

Link or text

Size

Color

QR codes are generated in your browser and never uploaded.

Free Consultation

🌉 FertiJourney

Medical tourism facilitation service. We are not a medical provider.

All medical services are provided by Luohu District People's Hospital, Shenzhen, China — a licensed public Grade-A tertiary hospital.

Treatment results vary individually and no outcome is guaranteed. All success data is cited from official hospital reports with age-stratified samples. Medical fees are paid directly to the hospital; FertiJourney service fees are listed separately.

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