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Self-Hosting
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Most online developer tools are bloated with intrusive ads, slow to load, or silently send your private snippets, JSON objects, tokens, and SQL queries to backend servers.
ZeroSnippet was built with three foundational principles:
- 🔒 100% Client-Side Privacy: Data manipulation happens strictly in your browser via Web APIs and WebAssembly. Your payloads and credentials are never transmitted, stored, or logged on any external server.
- ⚡ Blazing Fast: Built with Next.js 16, React 19, and Tailwind CSS v4 for instantaneous page switches, minimal footprint, and zero clutter.
- 🐳 Self-Hostable: Need an internal tools dashboard for your company VPN or home lab? Spin up the full suite with a single Docker command.
- 🌓 Dark & Light Mode: Clean, developer-tailored interface designed for long debugging sessions.
- 🔍 Instant Search: Find any utility in milliseconds using the integrated search palette (
/orCmd+K).
You can host your own private instance of ZeroSnippet inside your home lab or corporate network:
# docker-compose.yml
services:
zerosnippet:
image: zerosnippet:latest
build: .
container_name: zerosnippet
restart: unless-stopped
ports:
- "3000:3000"Start the container:
docker compose up -ddocker build -t zerosnippet .
docker run -d -p 3000:3000 --name zerosnippet zerosnippetOpen http://localhost:3000 in your browser.
Ensure you have Node.js 20+ installed on your machine.
-
Clone the repository:
git clone https://github.com/your-username/developer-tools.git cd developer-tools -
Install dependencies:
npm install
-
Start the development server:
npm run dev
-
Open http://localhost:3000 in your browser.
| Tool | Description |
|---|---|
| Broken Link Checker | Scan outbound links from any URL for 404s and broken hrefs. |
| HTTP Header Checker | Inspect HTTP response headers: cache-control, CORS, security headers. |
| Redirect Chain Checker | Trace the full redirect path to the final URL and spot unnecessary hops. |
| SSL Certificate Checker | Verify TLS certificate validity, expiry, issuer, and chain. |
| DNS Lookup Tool | Query A, AAAA, MX, CNAME, TXT, NS, and SOA records. |
| WHOIS Lookup | Look up domain registration details: registrar, dates, and status. |
| IP Address Lookup | Resolve IPv4 or IPv6 to geolocation, ISP, ASN, and hostname. |
| Domain Age Checker | Check domain registration age and vetting signals. |
| Robots.txt Checker | Review robots.txt rules, directives, and sitemap lines. |
| Meta Tags Extractor | Extract title, meta description, Open Graph, and Twitter Card tags. |
| Open Graph Preview | Preview social share cards across Facebook, Twitter/X, and LinkedIn. |
| Website Technology Detector | Detect CMS, frontend frameworks, analytics, and CDNs on any site. |
| Canonical Tag Checker | Confirm canonical tags and self-references to prevent SEO duplicate issues. |
| Server Response Code Checker | Check HTTP status codes (200, 301, 404, 500) for any URL in one request. |
| Tool | Description |
|---|---|
| JSON Formatter & Validator | Pretty-print, validate, minify, and browse JSON in a collapsible tree. |
| JavaScript / TypeScript Formatter | Beautify or minify JS/TS code with customizable indentation. |
| HTML Formatter | Clean up messy HTML tags and indent nested trees. |
| CSS Formatter & Minifier | Beautify or minify CSS rules and optimize stylesheets. |
| SQL Formatter | Pretty-print complex SQL queries with syntax highlighting and dialect support. |
| XML Formatter | Format, validate, and tree-view XML structures. |
| JSON to CSV Converter | Flatten and export JSON data into CSV spreadsheets. |
| CSV to JSON Converter | Parse CSV datasets into structured JSON arrays and objects. |
| JSON to YAML Converter | Convert configuration between JSON and YAML syntax. |
| YAML to JSON Converter | Parse YAML manifests into clean JSON objects. |
| HTML to Markdown Converter | Convert HTML snippets into clean Markdown format. |
| Markdown to HTML Previewer | Real-time Markdown editor with live HTML rendering and copyable code. |
| Regex Tester & Debugger | Test regular expressions with instant match highlighting and flags. |
| Base64 Encoder & Decoder | Encode/decode plain text and binary strings to Base64 format. |
| URL Encoder & Decoder | Percent-encode or decode URL query strings and URI components. |
| HTML Entities Encoder/Decoder | Convert special characters into HTML entities (&, <, etc.). |
| UUID / GUID Generator | Generate v4 and custom UUIDs in bulk with formatting options. |
| Hash Generator | Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly. |
| JWT Decoder | Inspect decoded headers, payloads, and timestamps without sending secrets. |
| Cron Expression Generator & Explainer | Build cron schedules with human-readable plain-English explanations. |
| Timestamp / Unix Epoch Converter | Convert epoch timestamps to human dates and ISO-8601 strings. |
| Code Diff & Comparison Tool | Side-by-side visual difference comparison between two text snippets. |
| Lorem Ipsum Generator | Generate custom placeholder paragraphs, sentences, and words. |
| Dummy Data Generator | Generate realistic test data (names, emails, addresses, phones) for testing. |
| Number Base Converter | Convert between Binary, Octal, Decimal, and Hexadecimal notations. |
| Color Code Converter | Convert between HEX, RGB, HSL, HSV, and CMYK color formats. |
| .gitignore Generator | Assemble standard .gitignore templates for Node, Python, Go, Rust, and more. |
| Tool | Description |
|---|---|
| Case Converter | Convert text to camelCase, snake_case, kebab-case, PascalCase, UPPER, lower. |
| Word & Character Counter | Count words, characters, sentences, paragraphs, and estimated reading time. |
| Duplicate Line Remover | Remove duplicate lines from lists and sort unique entries alphabetically. |
| Text Sorter | Sort lists alphabetically, numerically, by length, or reversed. |
| Slug Generator | Convert titles and headlines into clean, URL-friendly slugs. |
| String Reverser | Reverse strings, word order, or letter sequences. |
| Random String & Password Generator | Create cryptographically secure random passwords and tokens. |
| Morse Code Converter | Translate text to Morse code and Morse back to plain text. |
| Binary to Text Converter | Convert 8-bit binary strings to ASCII characters and back. |
| Whitespace Cleaner | Strip extra spaces, tabs, and trailing line breaks from raw text. |
| Line Break Converter | Normalize LF (Unix) and CRLF (Windows) newline line endings. |
| ASCII Art Generator | Convert text strings into stylish ASCII banner art. |
| ROT13 Cipher | Encode and decode text using classic ROT13 cipher rotation. |
| Tool | Description |
|---|---|
| Password Strength Meter | Score password entropy, estimate crack time, and get hardening tips. |
| bcrypt Hash Generator | Generate bcrypt hashes with configurable salt cost for auth testing. |
| AES-256 Encrypt & Decrypt | Encrypt and decrypt text with AES-256 and passphrase locally in-browser. |
| RSA Key Pair Generator | Generate 1024–4096 bit RSA public/private key pairs locally. |
| CSP (Content-Security-Policy) Builder | Assemble and test CSP directives for secure web response headers. |
| Security Headers Checker | Audit security headers (HSTS, X-Frame-Options, CSP) on any domain. |
| JWT Encoder | Build HS256-signed JWTs from custom headers and claims. |
| HMAC Generator | Create HMAC-SHA256 and HMAC-SHA512 signatures with secret keys. |
| SSL Certificate Decoder | Decode PEM certificates to read subject, issuer, SANs, and expiry. |
| .htaccess Generator | Assemble Apache .htaccess rules for redirects, HTTPS, and caching. |
| Tool | Description |
|---|---|
| Color Picker & Palette Generator | Pick colors, preview harmonies, and export CSS/Tailwind variables. |
| Contrast Checker (WCAG 2.1) | Check foreground/background contrast ratios against AA and AAA guidelines. |
| Color Blindness Simulator | Preview designs through Protanopia, Deuteranopia, and Tritanopia filters. |
| CSS Box Shadow Generator | Build smooth layered box shadows with real-time CSS output. |
| CSS Border Radius Generator | Design custom 8-point asymmetric border curves visually. |
| CSS Gradient Generator | Build multi-stop linear and radial gradients with modern CSS output. |
| Flexbox Playground | Test flex directions, alignment, wrapping, and item properties live. |
| CSS Grid Playground | Prototype grid templates, gaps, areas, and tracks with instant visual feedback. |
| Favicon Generator | Generate favicon.ico and multi-size PNG icons from images or text. |
| Tool | Description |
|---|---|
| Meta Title & Description Checker | Preview search snippet lengths for Google Desktop and Mobile SERPs. |
| Keyword Density Checker | Measure keyword frequency and density percentage across page copy. |
| Readability Score Checker | Run Flesch-Kincaid and Gunning-Fog readability grade calculations. |
| Robots.txt Generator | Generate crawler-friendly robots.txt directives and sitemap declarations. |
| XML Sitemap Generator | Convert a list of URLs into a standards-compliant XML sitemap. |
| Schema Markup Generator | Build JSON-LD structured data for Articles, FAQs, Products, and Organizations. |
| Open Graph Tag Generator | Build OpenGraph and Twitter Card <meta> tags with live preview. |
| Hreflang Tag Generator | Generate multilingual hreflang tag clusters for international SEO. |
| Redirect Type Checker | Differentiate 301 permanent vs 302 temporary redirects. |
| UTM Link Builder | Build tracking URLs with campaign, source, medium, and term parameters. |
| Tool | Description |
|---|---|
| HTTP Request Builder | Compose and send GET, POST, PUT, DELETE requests directly with fetch. |
| API Response Formatter | Parse JSON and XML API responses with tree navigation and syntax highlighting. |
| OpenAPI / Swagger Viewer | Render OpenAPI YAML/JSON specs in an interactive documentation viewer. |
| Webhook Payload Tester | Debug and log webhook POST bodies locally without external proxies. |
| HTTP Status Code Reference | Search HTTP status codes (1xx–5xx) with plain-English causes and remedies. |
| MIME Type Lookup | Map file extensions to Content-Type headers for API contracts. |
| OAuth 2.0 Flow Visualizer | Interactive step-by-step visualizer for Authorization Code & PKCE flows. |
| API Rate Limit Calculator | Calculate requests per minute and pacing against daily quota limits. |
- Framework: Next.js 16 (App Router, Standalone Output)
- UI & Styling: React 19, Tailwind CSS v4
- Icons: Lucide React
- Content & Blog: Next-MDX-Remote, Contentlayer2, Gray-Matter
- Containerization: Docker (Alpine Multi-Stage Build)
Contributions make the open-source community thrive! Whether it's adding a new developer utility, refining an existing UI, or fixing a bug:
- Check out our Contributing Guide.
- Fork the repository & create a feature branch (
git checkout -b feat/my-new-tool). - Commit your changes and open a Pull Request.
This project is open-source and licensed under the MIT License.
Built with ❤️ for developers worldwide by the ZeroSnippet team.