Developer &amp; Data Utilities

✓ RFC 8259 compliant parsing with precise line and column syntax error detection

JSON Formatter, Validator & Tree Inspector

Format, validate, beautify, and inspect JSON with custom indentation and tree view.

✓ Configurable indentation spacing (2 spaces, 4 spaces, or Tabs) and one-click minification

✓ Intelligent type inference for primitive types, nested objects, and heterogeneous arrays

JSON to TypeScript Interface & Type Generator

Convert JSON payloads into robust, type-safe TypeScript interfaces and types.

✓ Configurable output modes: TypeScript `interface`, `type` alias, and optional `readonly` modifiers

✓ Instant client-side decoding of JWT Header, Payload, and Signature components

JWT (JSON Web Token) Debugger & Claims Inspector

Inspect and decode JWT headers and payloads with live expiration countdown.

✓ Live expiration countdown timer and human-readable UTC / Local timestamp conversions

✓ Full UTF-8 Unicode encoding and decoding with complete multi-byte character support

Base64 Text & Binary File Encoder/Decoder

Encode and decode UTF-8 text or drop binary files to generate Base64 data URIs.

✓ Drag-and-drop file encoder for PNG, JPEG, SVG, WebP, PDF, and audio binaries

✓ Real-time calculation of SHA-256, SHA-512, SHA-384, SHA-1, and MD5 hashes

Cryptographic Hash Generator & Checksum Calculator

Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly using Web Crypto.

✓ HMAC (Hash-based Message Authentication Code) generator with custom secret keys

✓ RFC 3986 percent-encoding and decoding for full URLs and individual query parameters

Updated

URL Encoder / Decoder & Query Parameter Parser

Encode and decode query strings and parse complex URLs into editable key-value tables.

✓ Interactive Query Parameter Parser with add, edit, delete, and duplicate key capabilities

✓ Bidirectional conversion between Unix timestamps (seconds and milliseconds) and formatted dates

Unix / Epoch Timestamp Converter & Timezone Studio

Convert Unix epoch timestamps to ISO 8601, UTC, local date strings, and relative times.

✓ Live current Unix epoch timestamp ticker with one-click copy and pause functionality

✓ Real-time ECMAScript regular expression evaluation with match and capture group highlighting

Updated

Regular Expression (Regex) Tester, Debugger & Cheat Sheet

Test JavaScript regular expressions with real-time capture group highlighting.

✓ Full flag toggle support: `g` (global), `i` (case-insensitive), `m` (multiline), `s` (dotAll), `u` (unicode), `y` (sticky)

✓ High-resolution SVG to PNG rasterization with custom DPI scaling (1x, 2x, 3x, 4x retina)

SVG to PNG, React Component & Data URI Converter

Convert SVG vectors into high-res PNG, React JSX/TSX components, Data URIs, and optimized markup.

✓ Instant conversion to production-ready React (JSX / TSX) components with custom prop pass-through

✓ Interactive schedule builder for Minute, Hour, Day of Month, Month, and Day of Week fields

Cron Expression Generator & Human Explainer

Create, explain, and validate standard 5-part and Quartz cron expressions with upcoming run schedules.

✓ Real-time plain-English translation converting cryptic expressions into natural human sentences

✓ Multi-dialect parsing support: PostgreSQL, MySQL, MariaDB, SQLite, Oracle PL/SQL, SQL Server (T-SQL), and BigQuery

SQL Query Formatter, Beautifier & Minifier

Beautify and minify SQL queries for PostgreSQL, MySQL, T-SQL, BigQuery, and SQLite.

✓ Keyword casing transformations: UPPERCASE, lowercase, or Preserve Case for SQL reserved keywords

✓ Bi-directional conversion: Instant JSON-to-CSV and CSV-to-JSON with auto-sync and real-time validation

JSON to CSV & CSV to JSON Bi-Directional Converter

Bi-directional conversion between JSON arrays and CSV/TSV spreadsheets with RFC 4180 compliance.

✓ RFC 4180 compliant CSV parser handling escaped double quotes, line breaks within cells, and custom delimiters (comma, semicolon, tab, pipe)

✓ Dual format engine: Beautify and validate both HTML5 (void tags, boolean attributes) and strict XML documents

HTML & XML Formatter, Validator & Beautifier

Beautify, validate, and minify HTML5, XML, SVG, and RSS documents with syntax error detection.

✓ Configurable indentation (2 spaces, 4 spaces, Tabs) with smart attribute wrapping and self-closing tag handling

✓ Multi-target code generation: JavaScript (Fetch, Axios), Python (Requests, HTTPX), Go, PHP (cURL, Guzzle), Rust (Reqwest), and Dart

cURL Command to Fetch, Axios, Python, Go & PHP Converter

Transform cURL commands into JavaScript Fetch, Axios, Python Requests, Go, and PHP client code.

✓ Intelligent AST parser for complex cURL flags: --data-raw, -d, -H, -u, -X, --cookie, --compressed, and multi-line syntax

✓ Bi-directional instant conversion between YAML 1.2 specifications and standard RFC 8259 JSON

YAML to JSON & JSON to YAML Bi-Directional Converter

Bi-directional YAML to JSON and JSON to YAML converter with syntax validation and schema formatting.

✓ Automatic type preservation: handles strings, integers, floats, booleans, nulls, anchors, and multiline folded (>) / literal (|) strings

✓ Split side-by-side and unified inline diff viewing modes with synchronous scroll locking

Side-by-Side Visual Code & Text Diff Inspector

Compare code and text with side-by-side visual diffs, character-level highlighting, and whitespace controls.

✓ Granular character-level and word-level change highlighting within modified lines

✓ Interactive permission grid for Owner (User), Group, and Others with Read (r=4), Write (w=2), and Execute (x=1)

Linux Permissions & Chmod Numeric/Symbolic Calculator

Interactive Linux permissions calculator for octal (755, 644) and symbolic (rwxr-xr-x) modes with special bits.

✓ Bi-directional instant calculation: click checkboxes to update octal/symbolic notation, or type numeric octal (e.g. 755) to update checkboxes

✓ Automatic attribute transformation: class -> className, for -> htmlFor, tabindex -> tabIndex, and event handlers

HTML to React JSX & TSX Component Converter

Convert standard HTML markup, inline styles, and SVG attributes into clean React JSX & TypeScript TSX components.

✓ Inline CSS parser: Converts string style="..." declarations into typed React style={{ ... }} JavaScript objects

✓ Multi-dialect SQL parser: Supports PostgreSQL, MySQL, SQLite, and Microsoft SQL Server CREATE TABLE DDL

SQL DDL to TypeScript, Zod & Prisma Schema Converter

Transform SQL CREATE TABLE statements into TypeScript types, Zod schemas, and Prisma ORM models.

✓ TypeScript Interface & Type generation with primary key Omit insert DTOs and nullable types

✓ Universal base conversion: Decimal, Hexadecimal (0x), Binary (with 4-bit nibble formatting), Octal (0o), and ASCII characters

Number Base & 64-Bit Bitwise Converter Studio

Convert numbers across Decimal, Binary, Hex, Octal, and Float with an interactive 64-bit bitfield matrix.

✓ Interactive 64-bit clickable bitfield: Toggle individual bits in real time with NOT, shift, clear, and set shortcuts

✓ Bi-directional XML <-> JSON conversion with DOMParser parsing and recursive tree serialization

XML to JSON & JSON to XML Bi-Directional Converter

Convert between XML, SOAP web service envelopes, and JSON objects with attribute and array mapping.

✓ XML Attribute mapping: Preserves XML attributes using customizable prefixes (@attr) or flat properties

✓ Binary spreadsheet parser: Opens .xlsx, .xls, .csv, and .tsv files directly in browser using SheetJS WebAssembly

Excel, CSV, JSON & SQL Tabular Converter Studio

Convert Excel (.xlsx/.xls), CSV, TSV, JSON, and SQL INSERT queries with live data table preview.

✓ Interactive Data Grid preview: Search filter, column index, and instant row pagination

✓ Client-Side Vector Rasterization: Uses PDF.js to render PDF documents directly onto HTML5 Canvas without backend servers

Client-Side PDF to High-Res Image & Text Extractor Studio

Convert PDF pages to Retina PNG/JPG images and extract embedded text client-side.

✓ Multi-DPI Resolution Scaling: Export crisp 1.0x (96 DPI), 2.0x Retina (200 DPI), and 3.0x Ultra Print (300 DPI) images

✓ Client-Side Archive Engine: Unpack and inspect .zip, .tar, .gz, and .tgz archives in browser RAM using fflate and JSZip

Browser Archive Explorer & Converter (ZIP, TAR, GZ, TGZ)

Explore archive file trees, preview files, and convert between ZIP, TAR, and GZ formats in browser RAM.

✓ In-Browser File Inspector: View hierarchical directory trees and preview code, text, and images without writing to local disk

✓ Full Flag & Parameter Parsing: Accurately converts ports (-p), volumes (-v / --mount), environment variables (-e / --env-file), networks (--network), restart policies (--restart), resource limits, health checks, and entrypoints

DevOps

Docker Run to Docker Compose Converter

Convert complex CLI docker run commands into clean, standard docker-compose.yml configuration files.

✓ Multi-Container & Multi-Command Stacking: Paste multiple docker run commands simultaneously to generate a unified multi-service compose file with shared networks and volumes

✓ Comprehensive IPv4 Bitwise Engine: Calculate Network address, Broadcast address, Usable Host IP Range, Subnet Mask, Wildcard Mask, Binary IP/Mask, and PTR records

Network

CIDR & Subnet Calculator (IPv4 / IPv6)

Calculate IPv4/IPv6 CIDR prefixes, subnet masks, usable host ranges, and VLSM partitions.

✓ Usable Host Accuracy: Accurately handles /31 Point-to-Point links (RFC 3021) and /32 single host routing alongside standard /0 to /30 subnets

✓ 100% Client-Side & Air-Gapped: ASN.1 DER decoding and fingerprinting execute completely in your browser memory with zero network telemetry

Security

In-Browser SSL / TLS Certificate (X.509) Decoder

Decode and inspect X.509 SSL/TLS certificates, SANs, expiry timelines, and fingerprints.

✓ Full Distinguished Name Breakdown: Common Name (CN), Organization (O), Organizational Unit (OU), Country (C), State/Province, and Locality

✓ Bi-directional conversion between plain text strings and Hexadecimal byte representations

Hex to ASCII & Text Converter | Hex Dump Studio

Convert text to Hex, decode Hex to ASCII/UTF-8, and generate formatted hex dumps.

✓ Supports customizable byte delimiters: Space, None, Colon (:), Comma (,), 0x Prefix, C-Style (\x), and URL Percent (%)

✓ Visual Schema Builder: Configure personal, contact, location, commerce, and system fields with zero code

Mock Data & Dummy Record Generator | Seed Studio

Generate custom test data, seed tables, and export in JSON, CSV, SQL, or TypeScript.

✓ Multi-Format Exports: JSON Array, CSV (Excel ready), SQL INSERT statements, typed TypeScript interfaces, and YAML

✓ Comprehensive Unicode Scanner: Detects ZWSP (U+200B), ZWNJ (U+200C), ZWJ (U+200D), Word Joiner (U+2060), and BOM (U+FEFF)

Invisible Character & Zero-Width Space Detector | Unicode Forensics

Detect and remove zero-width spaces, BOM markers, NBSP, and hidden Unicode traps.

✓ Typography Space Analyzer: Locates Non-Breaking Spaces (NBSP U+00A0), NNBSP, Ideographic Spaces, and En/Em spaces

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WebCraftKit Platform 100% Client-Side Engine

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.

Zero Server Telemetry

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Sub-Millisecond Execution

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80 Production Tools

Explore Other Categories

CSS & Design

CSS & UI Design Tools

Generate high-performance CSS styles, smooth box shadows, modern glassmorphism, and accessible palettes.

SEO & Webmaster

Webmaster, SEO & Text Tools

Optimize metadata for search rankings, compose Markdown in real-time, generate sitemaps, and inspect text.

AI & LLM

AI & LLM Engineering

Professional browser-native utilities for prompt engineering, token counting, structured outputs, and RAG vector chunking.

Mobile & Apps

Mobile & App Development

Generate Xcode/Android icon suites, design App Store screenshot mockups, convert strings.xml, calculate DPI, and test deep links.