The Browser-Native
Developer Power Suite
Engineered for software architects, AI engineers, UI designers, mobile developers, and webmasters. No accounts, no paywalls, zero server uploads. Your data stays in your browser.
{
"project": "WebCraftKit",
"status": "online",
"speed": "0ms",
"privacy": 100
}Featured Power Studios
SVG Multi-Format Studio & Converter
Convert vector SVG code into high-res Retina PNGs, production React/TSX JSX components with currentColor substitution, CSS base64 data URIs, and optimized XML.
Browser Image Compressor
Compress and convert PNG, JPEG, and WebP images client-side via the HTML5 Canvas API with interactive quality slider and ZIP export.
Cron Expression Builder
Build crontab schedules visually with human-readable language translations and upcoming execution timestamp ticker.
WCAG Color Contrast & Accessibility Checker
Calculate exact luminance ratios between foreground and background colors with real-time AA/AAA compliance ratings and 1-click Auto-Tune contrast enhancer.
Engineered for Multi-Step Engineering Flows
Chain complementary tools together with 100% client-side zero-copy output piping. No manual copy-pasting required.
Beautify backend JSON response, compile strongly-typed TypeScript definitions, and generate LLM function schemas.
Deconstruct JWT authentication tokens, extract claim payloads, and compute cryptographic integrity hashes.
Convert master vector SVGs to high-res PNGs, package Xcode/Android adaptive app icons, and generate favicons.
Partition documents into overlapping chunks, estimate LLM token context usage, and construct system prompts.
Standardize UTM tracking parameters, generate customized QR codes, and test Google/Meta Ad copy previews.
Generate hardened .htaccess / Nginx security directives, configure AI crawler robots.txt, and minify HTML markup.
Complete Developer Workbench
Filter or switch between high-density Command Table and Card Grid views.
| Utility Engine | Action |
|---|---|
JSON FormatterPopular Format, validate, beautify, and inspect JSON with custom indentation and tree view. | Open |
JSON to TypeScriptPopular Convert JSON payloads into robust, type-safe TypeScript interfaces and types. | Open |
JWT DecoderEssential Inspect and decode JWT headers and payloads with live expiration countdown. | Open |
Base64 ToolPopular Encode and decode UTF-8 text or drop binary files to generate Base64 data URIs. | Open |
Hash GeneratorEssential Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly using Web Crypto. | Open |
URL EncoderUpdated Encode and decode query strings and parse complex URLs into editable key-value tables. | Open |
Timestamp ConverterPopular Convert Unix epoch timestamps to ISO 8601, UTC, local date strings, and relative times. | Open |
Regex TesterUpdated Test JavaScript regular expressions with real-time capture group highlighting. | Open |
GlassmorphismPopular Create ultra-modern frosted glass UI effects with customizable backdrop blur and transparency. | Open |
Box Shadow GeneratorEssential Craft smooth, multi-layered realistic CSS box shadows with light angle controls. | Open |
Gradient GeneratorPopular Design linear, radial, and conic CSS gradients with multi-color stops and angles. | Open |
Color Contrast CheckerA11y Calculate contrast ratios to guarantee WCAG 2.1 AA and AAA compliance. | Open |
Meta Tag GeneratorPopular Generate SEO meta tags with live visual previews for Google, Twitter, and Facebook. | Open |
Markdown Editor Real-time split-screen Markdown editor with live preview and HTML export. | Open |
Password & UUID GeneratorEssential Generate cryptographically secure random passwords with entropy ratings, alongside bulk UUID v4 generation. | Open |
Text UtilitiesPopular Convert text cases (camelCase, snake_case, UPPERCASE), analyze word counts and reading time, and compare text diffs. | Open |
Image CompressorPopular Compress, resize, and convert JPEG, PNG, and WebP images locally with real-time compression metrics. | Open |
SVG ConverterEssential Convert SVG vectors into high-res PNG, React JSX/TSX components, Data URIs, and optimized markup. | Open |
Favicon GeneratorNew Generate a full multi-platform favicon suite, web manifest, and HTML tags with ZIP export. | Open |
Cron GeneratorPopular Create, explain, and validate standard 5-part and Quartz cron expressions with upcoming run schedules. | Open |
SQL FormatterEssential Beautify and minify SQL queries for PostgreSQL, MySQL, T-SQL, BigQuery, and SQLite. | Open |
JSON / CSV ConverterPopular Bi-directional conversion between JSON arrays and CSV/TSV spreadsheets with RFC 4180 compliance. | Open |
HTML / XML FormatterNew Beautify, validate, and minify HTML5, XML, SVG, and RSS documents with syntax error detection. | Open |
Palette GeneratorPopular Create harmonious color palettes with monochromatic, complementary, and triadic schemes with CSS/Tailwind export. | Open |
CSS Clamp CalculatorNew Generate fluid typography and responsive spacing formulas with CSS clamp() between custom breakpoints. | Open |
QR Code GeneratorEssential Create custom styled QR codes with logo embedding, colors, error correction, and SVG/PNG export. | Open |
cURL to CodeEssential Transform cURL commands into JavaScript Fetch, Axios, Python Requests, Go, and PHP client code. | Open |
YAML & JSON ConverterPopular Bi-directional YAML to JSON and JSON to YAML converter with syntax validation and schema formatting. | Open |
Code Diff CheckerEssential Compare code and text with side-by-side visual diffs, character-level highlighting, and whitespace controls. | Open |
Chmod CalculatorPopular Interactive Linux permissions calculator for octal (755, 644) and symbolic (rwxr-xr-x) modes with special bits. | Open |
Clip-Path GeneratorPopular Visually craft CSS clip-path polygons, shapes, and responsive clipping masks with drag-and-drop handles. | Open |
Cubic-Bezier AnimatorNew Design custom cubic-bezier easing curves and transition timing functions with live motion preview. | Open |
CSS Loader GeneratorNew Customizable pure CSS loading spinners, skeleton animations, and bouncing indicators with single-click copy. | Open |
Robots.txt GeneratorPopular Create optimized robots.txt files with directives for search engines and modern AI web crawlers. | Open |
.htaccess GeneratorEssential Generate Apache .htaccess and Nginx rules for redirects, HTTPS enforcement, and security headers. | Open |
HTML MinifierNew Minify raw HTML markup, inline CSS styles, and inline scripts for faster page load times. | Open |
LLM Token CounterEssential Universal token counter and cost calculator for OpenAI, Anthropic, Gemini, and Llama 3. | Open |
System Prompt StudioPopular Interactive studio to generate structured, production-ready system prompts and meta-prompts. | Open |
LLM Schema BuilderEssential Generate strict JSON Schemas, OpenAI Structured Outputs, and function calling tools. | Open |
RAG Document ChunkerNew Split documents and code for RAG with recursive, token-aware chunking and overlap. | Open |
Schema Markup GeneratorEssential Visual Schema.org JSON-LD structured data generator for Google rich snippets and search results. | Open |
XML Sitemap GeneratorPopular Generate valid XML sitemap files with bulk import, priority mapping, and image tags. | Open |
Keyword Density AnalyzerEssential Analyze keyword density, N-gram phrase frequencies, and content readability scores. | Open |
Hreflang Tags GeneratorNew Generate multi-language and regional hreflang tags for international SEO. | Open |
App Icon GeneratorEssential Generate complete Xcode AppIcon.appiconset with Contents.json and Android mipmap adaptive icon suites from a single 1024x1024 master image. | Open |
Screenshot StudioPopular Wrap app screenshots inside iPhone 16 Pro and Pixel 9 device frames with customizable gradient backdrops, headlines, and export store-ready PNGs. | Open |
Strings ConverterEssential Bi-directional localization converter between Android strings.xml, iOS Localizable.strings, Flutter ARB, and JSON with format specifier validation. | Open |
DPI & DP CalculatorNew Real-time DP, SP, PT, and PX screen density matrix converter across iOS (@1x, @2x, @3x) and Android (mdpi to xxxhdpi) resolutions. | Open |
Deep Link StudioEssential Generate and test custom URL schemes, Apple App Site Association (apple-app-site-association) and Android assetlinks.json files. | Open |
UTM Link BuilderEssential Generate clean, standardized Google Analytics UTM campaign tracking URLs with channel presets, auto-slugify, and instant QR codes. | Open |
Ad Copy PreviewPopular Real-time Google Responsive Search Ads and Meta Facebook/Instagram sponsored feed ad copy editor with character limits and live card preview. | Open |
Readability AnalyzerEssential Calculate Flesch Reading Ease, Grade Level, and sentence complexity with live passive voice highlighting and reading time estimators. | Open |
A/B Test CalculatorNew Calculate two-tailed Z-score, P-value, conversion uplift %, and sample size requirements for CRO experimentation with 95% / 99% confidence. | Open |
Headline AnalyzerPopular Score headlines from 0 to 100 based on power words, emotional triggers, character limits, and estimated click-through rate (CTR) potential. | Open |
DESIGN.md GeneratorEssential Generate machine-readable DESIGN.md files, Tailwind v4 @theme tokens, and UI guidelines for Cursor, Claude Code, and Copilot. | Open |
AGENTS.md GeneratorPopular Generate universal AGENTS.md, .cursorrules, CLAUDE.md, and Copilot instructions with stack presets and anti-hallucination guardrails. | Open |
llms.txt GeneratorNew Generate and validate spec-compliant llms.txt and llms-full.txt files with live BPE token estimation and sitemap.xml import. | Open |
HTML to JSX ConverterPopular Convert standard HTML markup, inline styles, and SVG attributes into clean React JSX & TypeScript TSX components. | Open |
Color Space & OKLCH StudioPopular Convert web colors across OKLCH, HEX, RGB, HSL, Display P3, and CMYK with WCAG contrast and shade scales. | Open |
SQL to TypeScript ConverterEssential Transform SQL CREATE TABLE statements into TypeScript types, Zod schemas, and Prisma ORM models. | Open |
Number Base & Bitwise StudioPopular Convert numbers across Decimal, Binary, Hex, Octal, and Float with an interactive 64-bit bitfield matrix. | Open |
XML / JSON ConverterPopular Convert between XML, SOAP web service envelopes, and JSON objects with attribute and array mapping. | Open |
PX to REM & Clamp ConverterEssential Convert PX to REM, EM, and generate fluid CSS clamp() responsive typography formulas. | Open |
Excel / CSV / SQL StudioPopular Convert Excel (.xlsx/.xls), CSV, TSV, JSON, and SQL INSERT queries with live data table preview. | Open |
HEIC to JPG ConverterPopular Convert Apple iPhone HEIC and HEIF photos to JPG, PNG, or WebP with batch ZIP download. | Open |
Universal Image ConverterEssential Batch convert and resize images across WebP, PNG, JPG, AVIF, ICO, and BMP client-side. | Open |
DOCX to Markdown ConverterPopular Convert Microsoft Word .DOCX files to Markdown and HTML with table parsing and live preview. | Open |
Web Font ConverterEssential Inspect, convert, and subset TTF, OTF, and WOFF fonts with live glyph preview and @font-face CSS. | Open |
PDF Converter StudioPopular Convert PDF pages to Retina PNG/JPG images and extract embedded text client-side. | Open |
Archive Explorer & ConverterEssential Explore archive file trees, preview files, and convert between ZIP, TAR, and GZ formats in browser RAM. | Open |
Code to ImageNew Convert code snippets into beautiful, high-resolution screenshots with syntax themes, gradients, and macOS window styling. | Open |
LLM JSON RepairAI Instantly repair broken, truncated, malformed, or markdown-wrapped JSON outputs from LLMs. | Open |
Docker to ComposeDevOps Convert complex CLI docker run commands into clean, standard docker-compose.yml configuration files. | Open |
CIDR & Subnet CalcNetwork Calculate IPv4/IPv6 CIDR prefixes, subnet masks, usable host ranges, and VLSM partitions. | Open |
CSP & CORS StudioSecurity Build and audit Content Security Policy (CSP) and CORS HTTP headers for Apache, Nginx, and Cloudflare. | Open |
SVG OptimizerVector Optimize and clean SVG files, strip metadata, reduce file size, and export React JSX. | Open |
SSL Certificate DecoderSecurity Decode and inspect X.509 SSL/TLS certificates, SANs, expiry timelines, and fingerprints. | Open |
Hex to ASCIINew Convert text to Hex, decode Hex to ASCII/UTF-8, and generate formatted hex dumps. | Open |
Mock Data GeneratorNew Generate custom test data, seed tables, and export in JSON, CSV, SQL, or TypeScript. | Open |
Invisible Character DetectorNew Detect and remove zero-width spaces, BOM markers, NBSP, and hidden Unicode traps. | Open |
Air-Gapped Privacy & Zero-Latency Developer Utilities
Every cryptographic algorithm, schema transformer, color space converter, and binary extractor runs entirely in your browser RAM. Your tokens, API secrets, and source code are never sent to external servers.
Client-Side Native vs. Legacy Server Utilities
Traditional converter tools transmit your confidential tokens and source code across the internet. WebCraftKit executes 100% in your device's local memory.
Frequently Asked Questions
Everything you need to know about WebCraftKit's privacy, performance, and architecture.
Frequently Asked Questions
Everything you need to know about functionality, client-side privacy, specifications, and browser performance.