Free Developer Tools
Decode JWT tokens, format SQL queries, minifier code, generate UUIDs v4, test regex, and encode Base64.
Showing 149 Developer Tools Tools
100% Free • Client-Side EngineFast JSON Validator Pro
Fast JSON Validator Pro for instant, privacy-first client-side web processing.
Fast YAML Validator Pro
Fast YAML Validator Pro for instant, privacy-first client-side web processing.
Fast XML Validator Pro
Fast XML Validator Pro for instant, privacy-first client-side web processing.
Fast HTML Formatter Pro
Fast HTML Formatter Pro for instant, privacy-first client-side web processing.
Fast CSS Formatter Pro
Fast CSS Formatter Pro for instant, privacy-first client-side web processing.
Fast JS Formatter Pro
Fast JS Formatter Pro for instant, privacy-first client-side web processing.
Fast GraphQL Prettifier
Fast GraphQL Prettifier for instant, privacy-first client-side web processing.
Fast Markdown Table Generator
Fast Markdown Table Generator for instant, privacy-first client-side web processing.
Fast ASCII Folder Tree Generator
Fast ASCII Folder Tree Generator for instant, privacy-first client-side web processing.
Fast Visual Regex Builder
Fast Visual Regex Builder for instant, privacy-first client-side web processing.
Pro JSON Validator Pro
Pro JSON Validator Pro for instant, privacy-first client-side web processing.
Pro YAML Validator Pro
Pro YAML Validator Pro for instant, privacy-first client-side web processing.
Pro XML Validator Pro
Pro XML Validator Pro for instant, privacy-first client-side web processing.
Pro HTML Formatter Pro
Pro HTML Formatter Pro for instant, privacy-first client-side web processing.
Pro CSS Formatter Pro
Pro CSS Formatter Pro for instant, privacy-first client-side web processing.
Pro JS Formatter Pro
Pro JS Formatter Pro for instant, privacy-first client-side web processing.
Pro GraphQL Prettifier
Pro GraphQL Prettifier for instant, privacy-first client-side web processing.
Pro Markdown Table Generator
Pro Markdown Table Generator for instant, privacy-first client-side web processing.
Pro ASCII Folder Tree Generator
Pro ASCII Folder Tree Generator for instant, privacy-first client-side web processing.
Pro Visual Regex Builder
Pro Visual Regex Builder for instant, privacy-first client-side web processing.
Smart JSON Validator Pro
Smart JSON Validator Pro for instant, privacy-first client-side web processing.
Smart YAML Validator Pro
Smart YAML Validator Pro for instant, privacy-first client-side web processing.
Smart XML Validator Pro
Smart XML Validator Pro for instant, privacy-first client-side web processing.
Smart HTML Formatter Pro
Smart HTML Formatter Pro for instant, privacy-first client-side web processing.
Smart CSS Formatter Pro
Smart CSS Formatter Pro for instant, privacy-first client-side web processing.
Smart JS Formatter Pro
Smart JS Formatter Pro for instant, privacy-first client-side web processing.
Smart GraphQL Prettifier
Smart GraphQL Prettifier for instant, privacy-first client-side web processing.
Smart Markdown Table Generator
Smart Markdown Table Generator for instant, privacy-first client-side web processing.
Smart ASCII Folder Tree Generator
Smart ASCII Folder Tree Generator for instant, privacy-first client-side web processing.
Smart Visual Regex Builder
Smart Visual Regex Builder for instant, privacy-first client-side web processing.
Strong Password Generator
Generate cryptographically random passwords with custom symbols and length.
Free QR Code Generator
Generate high-resolution QR codes for URLs, Wi-Fi passwords, and contact cards.
Lorem Ipsum Dummy Text Generator
Generate custom paragraphs, sentences, or words of Lorem Ipsum filler text.
JSON to TypeScript Interface Generator
Convert raw JSON objects into strongly typed TypeScript interfaces.
JSON to Go Struct Generator
Convert JSON payloads into Go struct definitions with json tags.
JSON to Python Dataclass Generator
Convert JSON payloads into Python dataclass objects.
JSON to JSON Schema Builder
Generate draft-07 JSON Schema validation specs from JSON samples.
CSS Flexbox Layout Generator
Visually generate CSS Flexbox container and item rules.
CSS Grid Layout Generator
Generate CSS Grid template columns and rows with gap spacing.
CSS Box Shadow Generator
Visually design smooth CSS box-shadow styles with blur and spread.
CSS Border Radius Generator
Generate custom 8-point CSS border-radius corner styles.
CSS Linear & Radial Gradient Generator
Generate multi-stop CSS gradient background color codes.
.env Environment Variables Validator
Validate .env file keys for missing quotes, spaces, or duplicate definitions.
Node.js & Python Dockerfile Generator
Generate multi-stage Dockerfiles for Node.js, Next.js, and Python apps.
.gitignore Template Generator
Generate comprehensive .gitignore rules for Node, Python, Mac, and Windows.
Apache .htaccess Redirect Generator
Generate Apache .htaccess 301 redirects and HTTPS rewrite rules.
Nginx Reverse Proxy Config Generator
Generate Nginx server block configurations for Node.js and static web apps.
package.json Dependencies Validator
Validate package.json syntax, scripts, and dependency version ranges.
TypeScript tsconfig.json Generator
Generate tsconfig.json configuration files for Next.js and Node apps.
SHA-1 Hash Generator
Generate 40-character SHA-1 cryptographic hash digests.
SHA-512 Hash Generator
Generate 128-character SHA-512 cryptographic hash digests.
HMAC SHA-256 Signature Generator
Generate HMAC SHA-256 signatures for webhook security validation.
JWT Token Mock Builder
Generate un-signed mock JWT tokens with custom payload claims.
Random Alphanumeric String Generator
Generate secure random string sequences for API keys and tokens.
NanoID Generator
Generate URL-friendly, compact 21-character NanoIDs.
ULID Generator
Generate Universally Unique Lexicographically Sortable Identifiers.
Semantic Versioning (SemVer) Range Calculator
Test SemVer version specs (^1.2.0, ~2.0.0) against package versions.
Browser User-Agent String Parser
Parse User-Agent strings to extract browser name, OS, and device type.
IP Subnet CIDR Calculator
Calculate IPv4 subnet masks, CIDR ranges, usable IPs, and broadcast addresses.
MAC Address Formatter & Sanitizer
Format MAC addresses into colon, hyphen, or dot-separated notation.
HTTP Status Code Reference & Explainer
Inspect 200, 301, 400, 401, 403, 404, 500 HTTP response codes.
HTTP Security Headers Builder
Generate CSP, HSTS, X-Frame-Options, and Referrer-Policy headers.
CORS Headers Configuration Generator
Generate Access-Control-Allow-Origin headers for REST APIs.
JWT Token Decoder & Inspector
Decode JSON Web Tokens (JWT) to inspect Header, Payload claims, and Expiration dates instantly.
Cron Schedule Expression Generator
Generate standard 5-field cron syntax and get plain-English explanations of execution timing.
Base64 Text & Image Encoder / Decoder
Encode plain text or image files to Base64 strings, or decode Base64 strings back to text.
cURL Command to JavaScript fetch & Python Converter
Convert cURL terminal commands into clean JavaScript fetch(), Node.js axios, or Python requests code.
Bulk UUID v4 & GUID Generator
Generate 1 to 100 RFC 4122 compliant version 4 UUIDs (Universally Unique Identifiers) instantly.
HTML & CSS Code Minifier & Shrinker
Minify HTML and CSS code by stripping whitespace, line breaks, and redundant comments.
SQL Query Prettifier & Formatter
Format unreadable single-line SQL queries into clean, indented SQL statements.
Regular Expression (Regex) Tester & Explainer
Test JavaScript Regular Expressions against test strings with instant match highlighting.
MD5 & SHA-256 Hash Digest Generator
Generate cryptographic MD5, SHA-1, SHA-256, and SHA-512 hashes from input text strings.
JSON Prettifier & Syntax Validator
Format, validate, and minify raw JSON payloads with instant error line pointers.
Meta Graph API App Call Rate & Usage Calculator
Calculate your app's Meta Graph API call rate percentage and model high-traffic webhook performance.
Ultra JSON to XML Converter Pro
Ultra JSON to XML Converter Pro for instant, privacy-first client-side browser processing.
Ultra XML to JSON Converter Pro
Ultra XML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Ultra YAML to JSON Converter Pro
Ultra YAML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Ultra JSON to CSV Array Converter
Ultra JSON to CSV Array Converter for instant, privacy-first client-side browser processing.
Ultra HTML to React JSX Component Converter
Ultra HTML to React JSX Component Converter for instant, privacy-first client-side browser processing.
Ultra SVG to React Component Generator
Ultra SVG to React Component Generator for instant, privacy-first client-side browser processing.
Ultra CSS Styles to Tailwind CSS Generator
Ultra CSS Styles to Tailwind CSS Generator for instant, privacy-first client-side browser processing.
Ultra Side-by-Side JSON Diff Checker
Ultra Side-by-Side JSON Diff Checker for instant, privacy-first client-side browser processing.
Ultra JWT Header & Algorithm Inspector
Ultra JWT Header & Algorithm Inspector for instant, privacy-first client-side browser processing.
Ultra cURL Command to Python Requests Converter
Ultra cURL Command to Python Requests Converter for instant, privacy-first client-side browser processing.
Instant JSON to XML Converter Pro
Instant JSON to XML Converter Pro for instant, privacy-first client-side browser processing.
Instant XML to JSON Converter Pro
Instant XML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Instant YAML to JSON Converter Pro
Instant YAML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Instant JSON to CSV Array Converter
Instant JSON to CSV Array Converter for instant, privacy-first client-side browser processing.
Instant HTML to React JSX Component Converter
Instant HTML to React JSX Component Converter for instant, privacy-first client-side browser processing.
Instant SVG to React Component Generator
Instant SVG to React Component Generator for instant, privacy-first client-side browser processing.
Instant CSS Styles to Tailwind CSS Generator
Instant CSS Styles to Tailwind CSS Generator for instant, privacy-first client-side browser processing.
Instant Side-by-Side JSON Diff Checker
Instant Side-by-Side JSON Diff Checker for instant, privacy-first client-side browser processing.
Instant JWT Header & Algorithm Inspector
Instant JWT Header & Algorithm Inspector for instant, privacy-first client-side browser processing.
Instant cURL Command to Python Requests Converter
Instant cURL Command to Python Requests Converter for instant, privacy-first client-side browser processing.
Master JSON to XML Converter Pro
Master JSON to XML Converter Pro for instant, privacy-first client-side browser processing.
Master XML to JSON Converter Pro
Master XML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Master YAML to JSON Converter Pro
Master YAML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Master JSON to CSV Array Converter
Master JSON to CSV Array Converter for instant, privacy-first client-side browser processing.
Master HTML to React JSX Component Converter
Master HTML to React JSX Component Converter for instant, privacy-first client-side browser processing.
Master SVG to React Component Generator
Master SVG to React Component Generator for instant, privacy-first client-side browser processing.
Master CSS Styles to Tailwind CSS Generator
Master CSS Styles to Tailwind CSS Generator for instant, privacy-first client-side browser processing.
Master Side-by-Side JSON Diff Checker
Master Side-by-Side JSON Diff Checker for instant, privacy-first client-side browser processing.
Master JWT Header & Algorithm Inspector
Master JWT Header & Algorithm Inspector for instant, privacy-first client-side browser processing.
Master cURL Command to Python Requests Converter
Master cURL Command to Python Requests Converter for instant, privacy-first client-side browser processing.
Express JSON to XML Converter Pro
Express JSON to XML Converter Pro for instant, privacy-first client-side browser processing.
Express XML to JSON Converter Pro
Express XML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Express YAML to JSON Converter Pro
Express YAML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Express JSON to CSV Array Converter
Express JSON to CSV Array Converter for instant, privacy-first client-side browser processing.
Express HTML to React JSX Component Converter
Express HTML to React JSX Component Converter for instant, privacy-first client-side browser processing.
Express SVG to React Component Generator
Express SVG to React Component Generator for instant, privacy-first client-side browser processing.
Express CSS Styles to Tailwind CSS Generator
Express CSS Styles to Tailwind CSS Generator for instant, privacy-first client-side browser processing.
Express Side-by-Side JSON Diff Checker
Express Side-by-Side JSON Diff Checker for instant, privacy-first client-side browser processing.
Express JWT Header & Algorithm Inspector
Express JWT Header & Algorithm Inspector for instant, privacy-first client-side browser processing.
Express cURL Command to Python Requests Converter
Express cURL Command to Python Requests Converter for instant, privacy-first client-side browser processing.
Pro Max JSON to XML Converter Pro
Pro Max JSON to XML Converter Pro for instant, privacy-first client-side browser processing.
Pro Max XML to JSON Converter Pro
Pro Max XML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Pro Max YAML to JSON Converter Pro
Pro Max YAML to JSON Converter Pro for instant, privacy-first client-side browser processing.
Pro Max JSON to CSV Array Converter
Pro Max JSON to CSV Array Converter for instant, privacy-first client-side browser processing.
Pro Max HTML to React JSX Component Converter
Pro Max HTML to React JSX Component Converter for instant, privacy-first client-side browser processing.
Pro Max SVG to React Component Generator
Pro Max SVG to React Component Generator for instant, privacy-first client-side browser processing.
Pro Max CSS Styles to Tailwind CSS Generator
Pro Max CSS Styles to Tailwind CSS Generator for instant, privacy-first client-side browser processing.
Pro Max Side-by-Side JSON Diff Checker
Pro Max Side-by-Side JSON Diff Checker for instant, privacy-first client-side browser processing.
Pro Max JWT Header & Algorithm Inspector
Pro Max JWT Header & Algorithm Inspector for instant, privacy-first client-side browser processing.
Pro Max cURL Command to Python Requests Converter
Pro Max cURL Command to Python Requests Converter for instant, privacy-first client-side browser processing.
Turbo Code Beautifier Pro
Turbo Code Beautifier Pro for instant, privacy-first client-side browser processing.
Turbo Regex Evaluator Pro
Turbo Regex Evaluator Pro for instant, privacy-first client-side browser processing.
Turbo REST API Tester Helper
Turbo REST API Tester Helper for instant, privacy-first client-side browser processing.
Apex Code Beautifier Pro
Apex Code Beautifier Pro for instant, privacy-first client-side browser processing.
Apex Regex Evaluator Pro
Apex Regex Evaluator Pro for instant, privacy-first client-side browser processing.
Apex REST API Tester Helper
Apex REST API Tester Helper for instant, privacy-first client-side browser processing.
Prime Code Beautifier Pro
Prime Code Beautifier Pro for instant, privacy-first client-side browser processing.
Prime Regex Evaluator Pro
Prime Regex Evaluator Pro for instant, privacy-first client-side browser processing.
Prime REST API Tester Helper
Prime REST API Tester Helper for instant, privacy-first client-side browser processing.
Omega JSON Path & Query Evaluator
Omega JSON Path & Query Evaluator for instant, privacy-first client-side browser processing.
Omega Regex String Substitution Replacer
Omega Regex String Substitution Replacer for instant, privacy-first client-side browser processing.
Omega HTML Entity Cleaner Pro
Omega HTML Entity Cleaner Pro for instant, privacy-first client-side browser processing.
Omega SQL SELECT Query Builder Pro
Omega SQL SELECT Query Builder Pro for instant, privacy-first client-side browser processing.
Omega CSS Box Shadow Palette Builder
Omega CSS Box Shadow Palette Builder for instant, privacy-first client-side browser processing.
Quantum JSON Path & Query Evaluator
Quantum JSON Path & Query Evaluator for instant, privacy-first client-side browser processing.
Quantum Regex String Substitution Replacer
Quantum Regex String Substitution Replacer for instant, privacy-first client-side browser processing.
Quantum HTML Entity Cleaner Pro
Quantum HTML Entity Cleaner Pro for instant, privacy-first client-side browser processing.
Quantum SQL SELECT Query Builder Pro
Quantum SQL SELECT Query Builder Pro for instant, privacy-first client-side browser processing.
Quantum CSS Box Shadow Palette Builder
Quantum CSS Box Shadow Palette Builder for instant, privacy-first client-side browser processing.
Matrix JSON Path & Query Evaluator
Matrix JSON Path & Query Evaluator for instant, privacy-first client-side browser processing.
Matrix Regex String Substitution Replacer
Matrix Regex String Substitution Replacer for instant, privacy-first client-side browser processing.
Matrix HTML Entity Cleaner Pro
Matrix HTML Entity Cleaner Pro for instant, privacy-first client-side browser processing.
Matrix SQL SELECT Query Builder Pro
Matrix SQL SELECT Query Builder Pro for instant, privacy-first client-side browser processing.
Matrix CSS Box Shadow Palette Builder
Matrix CSS Box Shadow Palette Builder for instant, privacy-first client-side browser processing.
Meta Graph API Delay & Latency Simulator
Simulate webhook dispatch delay impacts on DM CTR and user conversion rates.
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