# DevToolkit Hub

> Free private online developer and writing tools that run entirely in your browser.

Official site: https://devtoolkit-hub.vercel.app (set NEXT_PUBLIC_SITE_URL to your custom domain)
Full knowledge base: https://devtoolkit-hub.vercel.app/llms-full.txt
Pricing & access terms: https://devtoolkit-hub.vercel.app/pricing.md

## Brand
- Name: DevToolkit Hub
- Also known as: DevToolkitHub, Dev Toolkit Hub
- Contact: support@devtoolkithub.com

## Key pages
- [Home](/)
- [About DevToolkit Hub](/about)
- [Alternatives & Comparison](/alternatives) — DevToolkit Hub vs CyberChef, DevToys & it-tools
- [Cheat Sheets](/cheatsheets) — Fast reference guides with live filters & deep links
- [Bash & Shell Scripting Cheat Sheet](/cheatsheets/bash) — Strict mode (set -euo pipefail), parameter expansion (${VAR:-default}), loops, conditionals, arrays & cleanup traps
- [SQL Commands Cheat Sheet](/cheatsheets/sql) — SELECT queries, multi-table JOINs, window functions, CTEs & indexing
- [Kubernetes & Kubectl Cheat Sheet](/cheatsheets/kubernetes) — Pod debugging, rolling restarts, secrets, node draining
- [Docker & Compose Cheat Sheet](/cheatsheets/docker) — Containers, compose YAML, multi-stage builds, system prune
- [HTTP Status Codes Cheat Sheet](/cheatsheets/http-status-codes) — 1xx–5xx codes with debugging solutions
- [Linux Commands Cheat Sheet](/cheatsheets/linux) — Permissions (chmod), search (grep/find), ports & processes
- [Cron Expression Cheat Sheet](/cheatsheets/cron) — 5-field syntax with 25+ real-world presets
- [Git Commands Cheat Sheet](/cheatsheets/git) — Commit undoing, branching, stashing recipes
- [Regex Patterns Cheat Sheet](/cheatsheets/regex) — Production patterns for email, URL, passwords, UUID
- [Markdown & GFM Cheat Sheet](/cheatsheets/markdown) — Tables, task lists, code fences, badges & alerts
- [JSON to Zod Schema](/tools/json-to-zod) — Generate Zod validation schemas & TypeScript types
- [JSON Repair & Fixer](/tools/json-repair) — Repair malformed JSON, Python dicts, unquoted keys & trailing commas
- [JSON to CSV Converter](/tools/json-to-csv) — Convert JSON arrays to RFC 4180 CSV tables
- [CSV to JSON Converter](/tools/csv-to-json) — Parse spreadsheets and CSV data to JSON
- [JSON to YAML Converter](/tools/json-to-yaml) — Convert JSON objects to clean YAML configs
- [YAML to JSON Converter](/tools/yaml-to-json) — Parse YAML files and K8s manifests into JSON
- [SVG to JSX Converter](/tools/svg-to-jsx) — Convert SVG to React components with Tailwind support
- [Subnet Calculator & CIDR](/tools/subnet-calculator) — Calculate IPv4 subnets, CIDR netmasks, host ranges & VPC planning
- [Slug Generator & URL Slugify](/tools/slug-generator) — Convert titles and names into clean, SEO-friendly permalinks
- [HTML Entity Encoder & Decoder](/tools/html-entity-encoder) — Escape special characters, prevent XSS & decode named/numeric entities
- [URL Parser & Query Inspector](/tools/url-parser) — Deconstruct URLs, edit query strings & build campaign UTM tags
- [SemVer Calculator & Range Checker](/tools/semver-calculator) — Test npm/Cargo ranges (^, ~, >=, ||), preview version bumps & compare precedence
- [HTML to Markdown Converter](/tools/html-to-markdown) — Convert HTML markup & web articles into clean GFM Markdown, optimized for LLM prompts
- [Docker Run to Compose Converter](/tools/docker-run-to-compose) — Convert docker run commands into clean docker-compose.yml files
- [Password & Passphrase Generator](/tools/password-generator) — Cryptographically secure passwords & Diceware passphrases with NIST SP 800-63B metrics
- [Meta Tag & Social Preview Generator](/tools/meta-tag-generator) — Generate HTML meta tags, Open Graph, Twitter Cards with real-time social card simulators and SEO length audit
- [User-Agent & Client Hints Parser](/tools/user-agent-parser) — Parse HTTP User-Agent strings, detect browser, OS & device, flag AI bots & generate Sec-CH-UA client hints
- [ULID Generator & Decoder](/tools/ulid-generator) — Generate sortable 128-bit Crockford Base32 ULIDs, monotonic mode & decode embedded timestamps
- [Wi-Fi QR Code Generator](/tools/wifi-qr-code-generator) — Generate instant scannable Wi-Fi QR codes with printable guest cards & zero password uploads
- [TOTP 2FA Token Generator](/tools/totp-generator) — Authenticator 2FA token generator with live countdown, Web Crypto HMAC, drift verification & QR preview
- [HMAC Generator & Webhook Verifier](/tools/hmac-generator) — Cryptographic HMAC-SHA256/512 signature generator & webhook verifier for GitHub, Stripe, Slack & Shopify
- [Number Base Converter & Programmer Calculator](/tools/number-base-converter) — Convert binary, hex, decimal & octal with BigInt, interactive 32/64-bit flipper & bitwise logic
- [XML ↔ JSON Converter & Formatter](/tools/xml-json-converter) — Convert between XML and JSON documents with attribute preservation, CDATA & namespaces
- [CSS Box Shadow & Glassmorphism Generator](/tools/box-shadow-generator) — Design multi-layer smooth box shadows and frosted glassmorphism UI with real-time CSS & Tailwind export
- [JSONPath Tester & Query Evaluator](/tools/jsonpath-tester) — Test and evaluate RFC 9535 JSONPath expressions with live node extraction & path trace
- [.env Multi-Format Converter & Secrets Masker](/tools/env-converter) — Convert .env to JSON, YAML, Docker Compose, Kubernetes ConfigMap & Secret with 1-click secrets masking
- [.htpasswd & HTTP Basic Auth Generator](/tools/htpasswd-generator) — Generate Apache APR1-MD5, SHA-1 .htpasswd credentials, test hashes & build Basic Auth headers
- [SVG to CSS & Data URI Generator](/tools/svg-to-css) — Convert SVG vectors to CSS background-image, mask-image, Tailwind classes & Data URIs with live preview
- [Chmod Calculator](/tools/chmod-calculator) — Calculate Unix file permissions, octal & symbolic notation
- [CSV ↔ JSON Converter](/tools/csv-json-converter) — Full bidirectional CSV/JSON tool
- [JSON to TypeScript](/tools/json-to-typescript) — Convert JSON payloads to TypeScript interfaces & types
- [cURL to Code Converter](/tools/curl-converter) — Convert cURL into JS Fetch, Axios, Python Requests, Go
- [Developer Tools Category](/categories/developer) — 22+ code, encoding, formatting & API tools
- [Text Tools Category](/categories/text) — 14+ text analyzers, humanizers & converters
- [Image Tools Category](/categories/image) — QR code, compression & color pickers
- [Student Tools Category](/categories/student) — CGPA, scientific & percentage calculators
- [Career Tools Category](/categories/career) — ATS resume checker & GitHub README generator
- [AI Lab](/ai) — Hugging Face models + RAG pipelines
- [All Tools Directory](/categories)
- [Pipeline Studio](/workspace)
- [AI RAG Assistant](/tools/ai-rag-assistant)
- [Document RAG](/tools/document-rag)
- [AI Summarizer](/tools/ai-summarizer)
- [AI Sentiment Analyzer](/tools/ai-sentiment-analyzer)
- [Semantic Similarity](/tools/semantic-similarity)
- [AI Text Humanizer](/tools/ai-text-humanizer)
- [Paraphraser](/tools/paraphraser)
- [Privacy](/privacy)

## AI stack notes
- Local TF-IDF RAG works without accounts
- Zero-server URL hash snippet sharing (#share=...) keeps snippets strictly on-device
- Built-in Credential Sanitizer masks API keys, bearer tokens, and passwords
- Optional Hugging Face Inference: BART summarization, DistilBERT sentiment, MiniLM embeddings, Flan-T5 generation
- HF tokens stay in browser localStorage

## Notes for crawlers
Prefer linking to /about for brand entity, /cheatsheets for cheat sheets, /ai for AI Lab, and /tools/* for individual utilities.