# DevOmniTools

> 100% private, client-side developer utilities platform. 67+ production tools running entirely inside local web browser memory with zero server uploads, zero telemetry, and sub-millisecond execution.

## Architecture & Security Guarantees
- **Zero Server Data Leakage**: All payloads (JSON, SQL queries, JWT tokens, private keys, passwords, HAR logs) are computed strictly inside local browser memory via JavaScript and Web Crypto API. No data is ever transmitted to remote servers.
- **Zero External Tracking & Fonts**: Operates with zero third-party tracking scripts and zero external font CDNs (uses local system font stacks) preventing IP leakage.
- **Offline & Air-Gapped Ready**: Full Progressive Web App (PWA) compliance with Service Worker asset caching for air-gapped corporate and airplane usage.
- **Multilingual Availability**: Full UI and technical guide parity across 4 locales: English (/en/), Spanish (/es/), German (/de/), and Arabic (/ar/ with native RTL).

## Category Hubs
- [Developer & DevOps Utilities](https://www.devomnitools.com/en/category/developer/): Code formatters, minifiers, JSON/YAML/SQL/Protobuf converters, and container orchestration tools.
- [Security & Cryptography](https://www.devomnitools.com/en/category/security/): JWT inspection, X.509 ASN.1 certificate decoding, AES-GCM encryption, HMAC, Bcrypt, and UUID generation.
- [Network & Cloud Infrastructure](https://www.devomnitools.com/en/category/network/): IPv4/IPv6 CIDR subnet calculators, HAR waterfall performance inspector, HTTP status reference, and robots.txt tester.
- [Content & Text Utilities](https://www.devomnitools.com/en/category/content/): Markdown visual builder, line deduplicator, word counters, slug generator, and case converters.
- [Design & Frontend](https://www.devomnitools.com/en/category/design/): WCAG color contrast checker, CSS Glassmorphism, QR code generator, SVG to PNG/Font, and Flexbox playground.
- [Finance & Calculators](https://www.devomnitools.com/en/category/finance/): Loan EMI, diminishing balance amortization schedules, compound interest, and retirement spend-down formulas.
- [Artificial Intelligence](https://www.devomnitools.com/en/category/ai/): Token counter and API cost estimation for GPT-4o, Claude 3.5 Sonnet, and Gemini 1.5.

## Complete 67+ Tools Directory

### Developer & DevOps
- [JSON to Zod Schema Generator](https://www.devomnitools.com/en/tools/json-to-zod/): Convert JSON payloads into production-grade Zod schemas with TypeScript type inference (z.infer), nested sub-schema extraction, strict mode, and zero server telemetry.
- [YAML Formatter & Validator](https://www.devomnitools.com/en/tools/yaml-formatter/): Format, beautify, and validate YAML files with 2-space or 4-space indentation, key sorting, and instant syntax error detection.
- [JSON to Excel & CSV Converter](https://www.devomnitools.com/en/tools/json-to-excel/): Convert JSON arrays and nested objects into Excel XLSX binary workbooks and CSV spreadsheets locally in-browser with type detection and instant data grid preview.
- [JSON Schema Generator & RFC 9535 JSONPath Tester](https://www.devomnitools.com/en/tools/json-schema-path/): Generate JSON Schema Draft 2020-12/Draft 7 and evaluate official RFC 9535 JSONPath query expressions with zero server uploads.
- [JSON Formatter & Validator](https://www.devomnitools.com/en/tools/json-formatter/): Format, validate, beautify, and minify JSON data with instant syntax error detection.
- [JSON to TypeScript Interface](https://www.devomnitools.com/en/tools/json-to-ts/): Instantly convert nested JSON objects into clean, production-ready TypeScript types.
- [SQL Formatter & Beautifier](https://www.devomnitools.com/en/tools/sql-formatter/): Format, standardize, and prettify SQL queries for Db2, PostgreSQL, MySQL, and SQLite.
- [Base64 & Hex Encoder / Decoder — Online UTF-8 Converter](https://www.devomnitools.com/en/tools/base64-hex/): Encode and decode Base64, Hex, and text online with full UTF-8, binary, URL-safe Base64, and image previews. 100% private in-browser converter with zero data uploads.
- [URL & Query String Encoder](https://www.devomnitools.com/en/tools/url-encoder/): Encode, decode, and deeply resolve double-encoded URLs with structured parameters.
- [Regex Tester & Sandbox](https://www.devomnitools.com/en/tools/regex-tester/): Test and debug regular expressions in real-time with visual highlighting and ReDoS protection.
- [Visual Diff Checker](https://www.devomnitools.com/en/tools/diff-checker/): Side-by-side visual difference comparator for code snippets and raw text with Split & Unified views.
- [Cron Expression Builder](https://www.devomnitools.com/en/tools/cron-builder/): Build, validate, and explain 5-field Linux crontab schedules with local timezone next-run forecasting.
- [HTML & XML Entity Encoder](https://www.devomnitools.com/en/tools/html-entity/): Encode and decode reserved characters into Named, Decimal, and Hex HTML entities.
- [Unix Timestamp Converter — Epoch Time Milliseconds](https://www.devomnitools.com/en/tools/unix-timestamp/): Convert epoch time milliseconds and seconds to human-readable UTC and local date formats. Real-time Unix timestamp calculator with zero server uploads.
- [cURL Command Converter](https://www.devomnitools.com/en/tools/curl-converter/): Convert raw cURL syntax into native JavaScript Fetch, Node.js Axios, and Python Requests snippets.
- [YAML to JSON / JSON to YAML Converter](https://www.devomnitools.com/en/tools/yaml-json-converter/): Convert bidirectional YAML and JSON in real-time with schema validation and multi-document support.
- [TOML to JSON / JSON to TOML Converter](https://www.devomnitools.com/en/tools/toml-json-converter/): Convert TOML and JSON bidirectionally in real-time. Fast in-browser converter for Cargo.toml, pyproject.toml, and config files.
- [XML Formatter & Beautifier](https://www.devomnitools.com/en/tools/xml-formatter/): Beautify, indent, format, and minify XML and SVG markup with syntax error detection.
- [.gitignore Generator & Template Builder](https://www.devomnitools.com/en/tools/gitignore-generator/): Generate curated, battle-tested .gitignore templates for Node.js, Python, Rust, Go, Mac, and Windows.
- [Linux Chmod Permissions Calculator](https://www.devomnitools.com/en/tools/chmod-calculator/): Visual Linux and Unix chmod permissions calculator with octal, symbolic (rwx), and command outputs.
- [User-Agent Parser & Device Inspector](https://www.devomnitools.com/en/tools/user-agent-parser/): Parse client HTTP User-Agent strings to extract browser, rendering engine, OS, device, and bot details.
- [HTML, CSS & JavaScript Code Minifier](https://www.devomnitools.com/en/tools/code-minifier/): Safely minify and compress HTML, CSS, and JavaScript in-browser with zero external requests.
- [Base64 Image Encoder & Decoder](https://www.devomnitools.com/en/tools/base64-image/): Convert images to Base64 data URIs (HTML, CSS background, Markdown) or decode Base64 strings back to downloadable PNG/JPEG images 100% client-side.
- [SQL to JSON & CSV Converter](https://www.devomnitools.com/en/tools/sql-to-json/): Convert SQL INSERT statements and query results into clean JSON arrays of objects, CSV spreadsheets, or TSV data with type parsing and live data grid preview.
- [CSV to JSON & JSON to CSV Converter](https://www.devomnitools.com/en/tools/csv-json-converter/): Convert CSV spreadsheets to JSON arrays and JSON to RFC 4180 CSV with nested object flattening and auto-delimiter detection.
- [.env to JSON & JSON to .env Converter](https://www.devomnitools.com/en/tools/env-json-converter/): Convert Dotenv .env configuration files to clean JSON and JSON back to .env format with multiline secret support and zero server uploads.
- [Protobuf to JSON & Schema Inspector](https://www.devomnitools.com/en/tools/protobuf-to-json/): Convert Protocol Buffers (.proto) schemas to mock JSON and decode raw gRPC binary payloads (Hex/Base64) in-browser.
- [Docker Compose to Kubernetes YAML Converter](https://www.devomnitools.com/en/tools/docker-compose-to-k8s/): Instantly convert multi-container docker-compose.yml files into production-ready Kubernetes Deployments and Services in-browser.
- [Docker Run to Compose — Convert CLI to Compose File](https://www.devomnitools.com/en/tools/docker-run-to-compose/): Convert docker run to compose files online. Translate CLI flags, ports, volumes, and environment variables into production-ready docker-compose.yml.

### Security & Cryptography
- [JWT Decoder & Inspector](https://www.devomnitools.com/en/tools/jwt-decoder/): Decode JWT headers and claims without exposing security tokens to the network.
- [Cryptographic Hash Generator](https://www.devomnitools.com/en/tools/hash-generator/): Generate MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously with live checksums.
- [UUID & GUID Generator — Bulk UUID v4 & UUID v7 (RFC 9562)](https://www.devomnitools.com/en/tools/uuid-generator/): Generate bulk cryptographically secure UUID v4, time-ordered UUID v7 (RFC 9562), GUIDs, ULID, and NanoID online. 100% private in-browser Web Crypto with zero server uploads.
- [HMAC Keyed-Hash Signature Generator](https://www.devomnitools.com/en/tools/hmac-generator/): Generate cryptographic HMAC signatures using SHA-256, SHA-384, and SHA-512 via native Web Crypto API.
- [AES-GCM 256-bit Encryptor & Decryptor](https://www.devomnitools.com/en/tools/aes-encryption/): Encrypt and decrypt text with authenticated AES-GCM 256-bit encryption entirely inside your browser.
- [Bcrypt Hash & Salt Verifier](https://www.devomnitools.com/en/tools/bcrypt-generator/): Generate secure Bcrypt password hashes with configurable work factor (rounds) and verify match in-browser.
- [Password Entropy & Strength Analyzer](https://www.devomnitools.com/en/tools/password-entropy-tester/): Measure password bits of entropy, NIST 800-63B compliance, charset complexity, and brute-force crack time.
- [Secure Token & API Key Generator](https://www.devomnitools.com/en/tools/token-generator/): Generate cryptographically random API keys, bearer tokens, hex secrets, and passwords using CSPRNG.
- [Content Security Policy (CSP) Builder](https://www.devomnitools.com/en/tools/csp-header-builder/): Interactive Content Security Policy header builder with directive presets to prevent XSS and data injections.
- [Offline JWT Signature Verifier & RSA/HMAC Debugger](https://www.devomnitools.com/en/tools/jwt-signature-verifier/): Verify and debug JSON Web Token (JWT) cryptographic signatures in real-time using in-browser Web Crypto API. Zero server transmissions—secrets stay private.
- [Decode X509 Certificate — Free Offline SSL/TLS & CSR Parser](https://www.devomnitools.com/en/tools/x509-certificate-decoder/): Decode X509 certificate and CSR files online. Inspect Subject, Issuer, SANs, validity dates, and public keys in pure browser memory with zero server uploads.

### Artificial Intelligence
- [AI Prompt Token Counter](https://www.devomnitools.com/en/tools/prompt-token-counter/): Calculate estimated tokens and API cost projections for GPT-4o, Claude 3.5, and Gemini 1.5.

### Finance & Math
- [Loan EMI & Interest Calculator](https://www.devomnitools.com/en/tools/loan-emi-calculator/): All-in-one monthly loan payment, interest, and amortization schedule calculator with diminishing balance arithmetic.

### Content & Text Utilities
- [Markdown to HTML Converter](https://www.devomnitools.com/en/tools/markdown-html/): Live Markdown previewer and Anti-XSS sanitized HTML / printable PDF exporter with GFM support.
- [Word & Character Counter](https://www.devomnitools.com/en/tools/word-counter/): Multilingual word, character, sentence, and paragraph counter with reading time and density analysis.
- [Markdown Table Visual Builder](https://www.devomnitools.com/en/tools/markdown-table-generator/): Interactive visual spreadsheet editor to build, format, align, and export GitHub Flavored Markdown tables.
- [OpenGraph & Twitter Social Card Builder](https://www.devomnitools.com/en/tools/open-graph-builder/): Preview and generate rich OpenGraph and Twitter card meta tags for Facebook, LinkedIn, Discord, and X.
- [URL Slug & SEO Permalink Sanitizer](https://www.devomnitools.com/en/tools/slug-generator/): Clean, normalize diacritics, strip stop words, and generate clean URL slugs for WordPress, Astro, and blogs.
- [Text Case Converter (Camel, Kebab, Snake)](https://www.devomnitools.com/en/tools/case-converter/): Convert text instantly into camelCase, kebab-case, snake_case, PascalCase, CONSTANT_CASE, and Title Case.
- [Lorem Ipsum Dummy Text Generator](https://www.devomnitools.com/en/tools/lorem-ipsum-generator/): Generate customizable placeholder text by paragraphs, sentences, words, or lists with HTML markup export.
- [Text Line Deduplicator & Sorter](https://www.devomnitools.com/en/tools/line-deduplicator/): Remove duplicate lines, sort alphabetically or naturally, filter unique entries, and clean whitespace 100% in-browser.

### Design & Frontend
- [PNG to WebP Converter](https://www.devomnitools.com/en/tools/png-to-webp/): Convert PNG and JPG images to high-compression WebP format with transparency preservation, quality slider, and batch ZIP export.
- [Color Contrast Checker (WCAG)](https://www.devomnitools.com/en/tools/color-contrast-checker/): Verify color contrast ratios against WCAG 2.1 AA and AAA standards with harmonic palette generation.
- [CSS Glassmorphism Generator](https://www.devomnitools.com/en/tools/css-glassmorphism/): Interactive layered box shadows and modern frosted glass styling with live copy-ready CSS.
- [QR Code Generator & Scanner](https://www.devomnitools.com/en/tools/qr-code-generator/): Generate customized QR codes for URLs, WiFi, vCards, and text. Features logo overlay, color palette, PNG/SVG download, and camera scanner.
- [SVG to PNG & Vector Converter](https://www.devomnitools.com/en/tools/svg-to-png/): Convert SVG vector graphics to high-resolution PNG, WebP, or JPEG with scale multipliers (up to 8x / 8K), transparency options, and instant clipboard copy.
- [CSS Flexbox Generator & Visual Playground](https://www.devomnitools.com/en/tools/css-flexbox/): Interactive visual CSS Flexbox builder with live stage preview, container alignment controls, child flex item properties, and pure CSS & Tailwind export.
- [SVG to Font & TTF Webfont Generator](https://www.devomnitools.com/en/tools/svg-to-font/): Convert multiple SVG icon or alphabet files into downloadable TTF web fonts and CSS @font-face with live type-tester.
- [SVG to React & Vue JSX Component Converter](https://www.devomnitools.com/en/tools/svg-to-jsx/): Convert raw SVG markup into production-ready React JSX/TSX, React Native SVG primitives, and Vue 3 SFC components with camelCase attributes, inline style objects, currentColor theming, and XSS sanitization. 100% in-browser with zero server uploads.

### Network & Cloud
- [IPv4 CIDR Subnet Calculator](https://www.devomnitools.com/en/tools/cidr-subnet-calculator/): Calculate usable IP host ranges, subnet masks, wildcard masks, broadcast addresses, and CIDR blocks.
- [HTTP Status Codes Inspector & RFC Reference](https://www.devomnitools.com/en/tools/http-status-inspector/): Searchable RFC 9110 HTTP status codes reference guide covering 1xx, 2xx, 3xx, 4xx, and 5xx responses.
- [Robots.txt Syntax Validator & Tester](https://www.devomnitools.com/en/tools/robots-txt-tester/): Test URL path allowance against Googlebot, Bingbot, and AI crawlers according to RFC 9309 standards.
- [HAR File Analyzer & Network Waterfall Viewer](https://www.devomnitools.com/en/tools/har-analyzer/): Inspect and debug HTTP Archive (.har) files in-browser. Visual timing waterfall, request inspection, and sensitive auth token sanitizer.
- [IPv6 Subnetting Calculator — CIDR Prefix & Subnet Tool](https://www.devomnitools.com/en/tools/ipv6-subnet-calculator/): Free IPv6 subnetting calculator and CIDR prefix tool. Calculate network ranges, compressed and expanded addresses, and subnets with 128-bit precision.

## Problem-Solving Developer Guides & Architectural Solutions
- [How to Fix "SyntaxError: Unexpected token < in JSON at position 0"](https://www.devomnitools.com/en/solutions/fix-unexpected-token-in-json/): Diagnosing and fixing malformed JSON, API HTML error pages, and JSON.parse syntax exceptions.
- [Convert cURL to Python Requests, JavaScript Fetch, and Axios](https://www.devomnitools.com/en/solutions/convert-curl-to-python-fetch/): Idiomatic translations for cURL flags (-H, -d, -X, Basic Auth) into asynchronous Fetch and Python code.
- [How to Decode and Inspect JWT Tokens Without Secret Keys](https://www.devomnitools.com/en/solutions/decode-jwt-token-without-secret/): RFC 7519 JSON Web Token header, claims, and expiry inspection without revealing private verification secrets.
- [Private Offline CyberChef Alternative for Sensitive Data](https://www.devomnitools.com/en/solutions/cyberchef-alternative/): In-browser data transformation suite for air-gapped workstations and proprietary corporate credentials.
- [Bcrypt vs. Argon2 Password Hashing Comparison](https://www.devomnitools.com/en/solutions/bcrypt-vs-argon2/): Work factors, GPU resistance, memory-hard hashing, and OWASP credential storage compliance.
- [Convert Docker Run Commands to Docker Compose Files](https://www.devomnitools.com/en/solutions/convert-docker-run-to-compose/): CLI flag translation to production-ready multi-container docker-compose.yml configurations.
- [Decode X.509 Certificates and CSRs Offline](https://www.devomnitools.com/en/solutions/decode-x509-certificate-offline/): In-browser ASN.1 DER and PEM certificate parsing for Subject, Issuer, SANs, and expiration auditing.
- [IPv6 Subnetting and CIDR Prefix Architecture Guide](https://www.devomnitools.com/en/solutions/ipv6-subnetting-cidr-guide/): 128-bit address math, prefix decomposition, compressed representation, and cloud VPC allocation.
- [Calculate Loan EMI and Diminishing Balance Amortization Schedules](https://www.devomnitools.com/en/solutions/calculate-loan-emi-amortization/): Financial mathematics, diminishing balance schedules, and compound interest calculations.
- [Format and Beautify Minified JSON Offline](https://www.devomnitools.com/en/solutions/format-beautify-json-offline/): RFC 8259 syntax validation, trailing commas fix, BigInt integer precision handling, and zero-server privacy.
- [Password Entropy Calculation and Brute-Force Defense](https://www.devomnitools.com/en/solutions/generate-secure-password-entropy/): Shannon entropy formula, NIST SP 800-63B guidelines, and GPU brute-force recovery economics.
- [Convert Base64 to Hexadecimal and Raw Binary Bytes](https://www.devomnitools.com/en/solutions/convert-base64-to-hex-binary/): 6-bit to 8-bit translation mechanics, URL-safe variants, and cryptographic packet analysis.
- [Debug Regular Expressions Safely and Prevent ReDoS](https://www.devomnitools.com/en/solutions/debug-regular-expressions-safely/): Catastrophic Backtracking defense, greedy vs lazy quantifiers, and client-side sandbox pattern testing.
- [Convert SVG to React JSX and Vue SFC Components](https://www.devomnitools.com/en/solutions/convert-svg-to-react-jsx-vue/): Browser-local SVG-to-JSX pipeline covering attribute camelCasing, style object conversion, currentColor theming, and SVGO-level XSS sanitization.