API Playground

Developer Tools Text Diff Checker Compare two texts and identify changed lines.

Developer Tools Markdown Editor Write Markdown and preview safe formatted HTML in your browser.

Developer Tools XML and JSON Converter Convert well-formed XML and JSON data in your browser.

Developer Tools CSS Box Shadow Generator Configure and copy a CSS box shadow with a live preview.

Developer Tools Color Format Converter Convert valid HEX, RGB, HSL, and CMYK color values.

Developer Tools JSON Formatter Validate and pretty-print JSON locally with configurable indentation.

Developer Tools Regex Tester Test a JavaScript regular expression against text and list matching results.

Developer Tools URL Encoder / Decoder Encode or decode URL components locally.

Developer Tools HTML Entity Converter Encode special characters as HTML entities or decode entities locally.

Developer Tools Cron Expression Helper Validate standard five-field cron expressions and choose common schedules.

Developer Tools Code Line Counter Count total, non-empty, and blank lines in pasted text locally.

Developer Tools Gitignore Generator Create a starter .gitignore from common project and operating-system templates.

Developer Tools HTTP Status Reference Search a concise reference of common HTTP status codes.

Developer Tools MIME Type Lookup Look up common file extensions and MIME types in a local reference.

Developer Tools CSS Flexbox Generator Configure a responsive flexbox layout and preview the generated CSS.

Developer Tools CSS Grid Generator Configure a CSS grid layout and preview the generated CSS.

Developer Tools CSS Clamp Generator Generate a fluid CSS clamp() value from size and viewport limits.

Developer Tools Unix Timestamp Converter Convert Unix timestamps to readable dates and dates to Unix seconds.

Developer Tools UUID Generator Generate RFC 4122 version 4 UUIDs locally with cryptographic randomness.

Developer Tools UUID Validator Check whether each pasted value is a valid UUID string.

Developer Tools JSON Schema Generator Infer a basic JSON Schema from a sample JSON value locally.

Developer Tools JSON Schema Validator Validate JSON against a clearly documented subset of JSON Schema keywords.

Developer Tools SQL INSERT Generator Generate parameter-free SQL INSERT statements from flat JSON records with validated identifiers.

Developer Tools CSS Border Radius Generator Build a CSS border-radius value with a live preview.

Developer Tools CSS Transform Generator Compose translate, rotate, scale and skew transforms with a live preview.

Developer Tools CSS Animation Generator Generate a small CSS animation snippet from built-in safe presets.

Developer Tools JSON to XML Converter Convert JSON into escaped XML elements using a configurable root element.

Developer Tools XML to JSON Converter Convert XML into JSON with repeated elements represented as arrays.

Developer Tools HTML Formatter Indent and format HTML fragments locally; browser parsing may normalize markup.

Developer Tools HTML Minifier Remove inter-tag whitespace from HTML fragments locally; whitespace-sensitive layouts may change.

Developer Tools CSS Formatter Apply readable indentation and spacing to CSS without executing it.

Developer Tools CSS Minifier Conservatively remove redundant whitespace from CSS while retaining comments.

Developer Tools JavaScript Formatter Apply best-effort indentation and spacing while preserving strings and comments; this is not a full parser.

Developer Tools JavaScript Minifier Conservatively remove redundant whitespace while preserving strings and comments; this is not a full parser.

Developer Tools SQL Formatter Format common SQL clauses locally; dialect-specific syntax may require manual review.

Developer Tools SQL Minifier Conservatively compact SQL whitespace while preserving quoted strings and comments.

Developer Tools Markdown to HTML Convert common Markdown headings, lists, emphasis, links, and code to escaped HTML locally.

Developer Tools HTML to Markdown Convert common HTML headings, paragraphs, links, lists, and emphasis to Markdown locally.

Developer Tools Webhook Tester (Request Preview) Validate and preview a webhook request and JSON payload locally; no network request is sent.

Developer Tools Code Snippet Manager Save, edit, search, and export code snippets in this browser using local storage.

Developer Tools htaccess Generator Generate a starter Apache .htaccess file from selected common options for manual review.

Developer Tools Nginx Config Generator Generate a basic static-site server block from a validated domain and document root.

Developer Tools YAML Validator (Basic Subset) Check common indentation, mapping, list, and scalar syntax locally; this is not a full YAML 1.2 parser.

Developer Tools SQL CREATE TABLE Generator Generate a CREATE TABLE statement from validated identifiers and a limited set of column types.

Developer Tools SQL Query Builder Build a parameterized SELECT query with validated identifiers and a separate value binding.

Developer Tools API Response Formatter Format pasted API response JSON or text with user-entered status and headers; no request is sent.

Developer Tools User Agent Parser Summarize common browser, operating system, and device hints from pasted user-agent text locally.

Developer Tools Regex Library Browse a small curated set of common regular expressions with their limitations and examples.

Developer Tools HTML Preview Playground Preview HTML and CSS in a sandboxed frame with scripts and external network resources blocked.

Developer Tools API Playground Compose and validate an HTTP request locally, then export its JSON configuration or a fetch example. Requests are not sent and credentials are not stored.