A complete suite of utilities designed to speed up your development workflow. format code, validate data, and generate configs instantly.
Toolkit
57
development tools
Real-time regular expression tester with highlighting and cheat sheet.
Open Utility
Compare two JSON objects structurally to find differences.
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Calculate IP ranges, netmasks, and CIDR subnet details.
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Visual builder for Cron schedules with next-run previews.
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Visually design and generate CSS box-shadow code.
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Create custom .gitignore files for your projects instantly.
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Convert pixels to REM units with live preview.
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Convert JSON objects into TypeScript interfaces instantly.
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Convert raw HTML to React/Next.js compatible JSX.
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Format, validate, and beautify your JSON with instant error detection.
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Format, beautify, and standardize your SQL queries instantly.
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Generate customizable QR codes for URLs, text, and more.
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Generate Open Graph meta tags for social media sharing.
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Create a robots.txt file to control how search engine crawlers access your site.
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Generate standard HTML meta tags for SEO.
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Generate customizable barcodes (Code128, EAN, UPC, etc.).
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Create and download digital signatures.
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Calculate Linux file permissions (chmod) visually.
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Display device, browser, and OS information.
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Visualize JavaScript keyboard events.
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Visualize JSON as a sortable, searchable interactive table.
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Minify and compress JSON data.
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Minify and compress CSS code.
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Minify and compress SQL queries.
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Validate IPv4 and IPv6 addresses.
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Decode and inspect JSON Web Tokens (JWT).
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Convert cURL commands to JSON format.
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Convert JSON objects to Java POJO classes.
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Convert JSON objects to C# classes.
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Convert JSON arrays to SQL INSERT statements.
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Parse and analyze User Agent strings to identify browser, OS, and device.
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Generate realistic fake JSON, CSV, or SQL datasets with configurable fields: names, emails, UUIDs, dates, addresses, and more.
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Test REST APIs directly in the browser. Supports GET/POST/PUT/DELETE, custom headers, JSON/form body, and Bearer/Basic auth.
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Pretty-print and minify GraphQL queries, mutations, and fragments with proper indentation.
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Connect to any WebSocket server, send and receive messages, and inspect the full conversation log in real time.
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Generate and decode JWTs with HS256/HS384/HS512 algorithms. Build payload key-value pairs and sign securely in-browser.
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Validate JSON data against a JSON Schema (Draft-7) using AJV. Shows all validation errors with paths and messages.
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Generate a JSON Schema (Draft-7) from any sample JSON object. Infers types, required fields, and nested structure.
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Evaluate JSONPath expressions against JSON data. Supports dot notation, wildcards, array indexes, and filter expressions.
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Evaluate XPath 1.0 expressions against XML documents using the browser XPathEvaluator. Shows matched nodes instantly.
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Validate and convert YAML ↔ JSON. Parse YAML with clear error messages including line and column numbers.
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Convert TOML ↔ JSON ↔ YAML with full TOML spec support. Validate TOML syntax and transform formats instantly.
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Visual Apache .htaccess rule builder. Toggle HTTPS redirect, www/non-www, caching, Gzip, bot blocking, and more.
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Generate nginx server blocks for static sites, reverse proxies, PHP-FPM, Node.js, and Django with SSL and security headers.
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Generate boilerplate Dockerfiles for Node.js, Next.js, Python, Go, Java, Rails, PHP, Rust, and static sites.
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Build .editorconfig files with indent style, size, line endings, charset, and language-specific overrides.
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Generate RSA key pairs (1024/2048/4096-bit) in PEM format. Download public and private keys separately.
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Generate Ed25519 and RSA SSH key pairs in PEM/PKCS8 format. Ready for authorized_keys and server authentication.
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Symmetric AES-256-GCM encryption and decryption using PBKDF2 key derivation. Fully in-browser, nothing sent to servers.
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Asymmetric RSA-OAEP encryption and decryption with PEM keys. Uses Web Crypto API — fully client-side.
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Generate OpenPGP key pairs, encrypt messages with a public key, and decrypt with a private key using OpenPGP.js.
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Decode and inspect SSL certificates, public keys, and private keys in PEM format. View subject, issuer, SANs, and expiry.
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Decode Certificate Signing Requests to view CN, O, OU, SANs, key size, and signature algorithm.
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Interactive regex reference with live pattern tester. Click tokens to build expressions, test against strings, and see matches highlighted.
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Translate cron expressions to plain English. Shows field breakdown, next 10 run times, and common presets.
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Convert cURL commands to Python requests, JavaScript fetch, PHP, Go, PowerShell, and Axios code instantly.
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Convert images to Base64 data URIs. Output as raw string, HTML img tag, or CSS background-image. Supports PNG, JPEG, WebP, SVG.
Open Utility