Every tool, one place

Browse 500+ AI prompts for coding, writing, analysis, and more.

Search 400K+ public AI/ML datasets on Hugging Face, plus a curated offline catalog.

Count tokens in text for GPT-4, Claude, Llama, and other models.

Build, test, and refine system prompts for LLM-based applications.

Generate standardized model cards for ML models with documentation.

Format, validate, minify, and prettify JSON data instantly.

Decode and inspect JWT tokens: header, payload, signature, expiration.

Encode text or files to Base64 and decode back. UTF-8 safe.

Test regular expressions in real-time with match highlighting and groups.

Generate UUIDs and ULIDs: v4, v7, bulk mode, copy, download.

Convert Unix timestamps to human-readable dates and back.

Generate MD5, SHA-1, SHA-256, SHA-512 hashes for text and files.

Format and beautify SQL queries for PostgreSQL, MySQL, SQLite.

Build and test cron expressions with next-run previews.

Generate strong, secure passwords with customizable character sets and entropy.

Generate .gitignore files with 500+ templates for any tech stack.

Compare text and code side by side with line-level highlighting.

Encode and decode URLs, query strings, and components. Parse URLs into parts.

Send HTTP requests, inspect responses, and generate curl commands.

Encode and decode HTML entities with a character reference cheat sheet.

Minify and beautify JavaScript with comment stripping and gzip sizing.

Minify and beautify CSS with comment stripping and gzip sizing.

Format, minify, validate, and visualize HTML as a DOM tree.

Format, minify, validate, and visualize XML documents as a tree.

Convert text between lowercase, UPPERCASE, Title Case, camelCase, snake_case, and more.

Preview layouts at any screen size with device presets and media query snippets.

Turn code into shareable PNG screenshots with themes, line numbers, and chrome.

Minify and clean SVG files with svgo in your browser: no upload needed.

Decode PEM certificates: subject, issuer, SANs, key details, fingerprints.

Upload a .har file and analyze every request: timings, waterfall, payloads.

Lint Dockerfiles for best practices: layers, caching, security, size.

Validate docker-compose.yml: syntax, services, ports, volumes, networks.

Lint .env files: syntax, duplicates, secrets, and clean exports.

Score passwords with zxcvbn and check for known breaches via HIBP.

Build Content-Security-Policy headers with guided directive and source selection.

Check bundle sizes of npm packages: minified + gzip, compare two packages.

Preview how your page looks on Google, Facebook, X and LinkedIn.

Look up A, AAAA, CNAME, MX, NS, TXT, SOA, PTR, and CAA records via DNS-over-HTTPS.

Check the HTTP status of any URL, follow redirect chains, and inspect headers.

Validate TOML configuration files against the TOML 1.0 spec and convert to JSON.

Paste a git diff and read it visually: hunks, line numbers, additions, deletions.

Pick the right license for your project with a goals-based decision wizard.

Track your first open source contribution step by step: saved in your browser.

Discover active open source projects to contribute to: search by language, stars, license, and recent activity: live from GitHub.

Analyze your GitHub profile and get an industry-grade score with exact, prioritized fixes and copy-paste templates.

Convert JSON arrays to CSV spreadsheets and back. Supports nested data.

Convert between JSON and YAML formats without data loss.

Convert Markdown to clean HTML with live preview and GFM support.

Convert colors between HEX, RGB, HSL, HSV, and CMYK formats.

Convert numbers between binary, octal, decimal, hex, base-32, and base-64.

Compress and resize images locally: WebP, JPEG, PNG with quality control.

Calculate API costs for GPT-4, Claude, Gemini, and other LLMs.

Calculate rate limits, burst capacity, and throttling for APIs.

Estimate database size based on row count, columns, and data types.

Calculate bandwidth and data transfer costs across cloud providers.

Calculate network, broadcast, hosts, and masks for any IPv4 or IPv6 CIDR block.

Convert Unix file permissions between numeric, symbolic, and ls-style formats.

Generate realistic fake data in JSON, CSV, or SQL format.

Generate lorem ipsum and sample text in words, sentences, or paragraphs.

Convert JSON to TypeScript interfaces, types, and Zod schemas.

Generate CREATE TABLE statements from JSON or CSV data.

Generate OpenAPI 3.1 specifications from sample data.

Generate realistic mock API responses for frontend development.

Scan QR codes with your camera or from an image file: decoded entirely in your browser.

Generate QR codes with custom colors, sizes, and error correction levels.

Generate favicon.ico, PWA icons, apple-touch-icon, and manifest files from one image.

Generate CONTRIBUTING.md, PR templates, issue templates, SECURITY.md, and Code of Conduct for your open source repo.

Generate a complete developer portfolio site and GitHub profile README from one form: live preview, zero signup.