Developer Tools

Format, validate, and minify JSON with error details, key sorting, and copy-ready output.

Compare two JSON objects and see the differences.

Convert JSON to CSV with nested flattening, column selection, delimiter options, and copy/download — all in your browser.

Convert Markdown to HTML with live preview, raw HTML output, and copy/download — processed locally for privacy.

Convert CSV to JSON with paste/upload, delimiter auto-detect, header controls, and copy/download — all in your browser.

Convert between JSON, YAML, and XML with auto-detect, prettify, and minify.

Search and browse HTTP status codes with explanations, use cases, and snippets.

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text and small files.

Decode JWT header and payload safely in your browser.

Encode or decode Base64 and URLs quickly.

Test regular expressions with live matches.

Convert epoch seconds/millis to readable time and back.

Format, minify, and case-convert SQL queries instantly in your browser.

Generate UUIDs (v4) and check validity.

Convert JSON to TypeScript interfaces with nested objects, arrays, nullable handling, and copy-ready output.

Generate .gitignore files for Node, Python, Java, React, Next.js, Docker, and OS-specific ignores. Merge, dedupe, copy, or download instantly.

Convert CSS declarations to Tailwind utility classes, highlight unmatched rules, and copy-ready output.

Convert HTML snippets to clean Markdown with support for headings, links, lists, code blocks, and more, plus unsupported tag reporting.

Convert .env key=value lines to JSON or YAML, ignoring comments and preserving order, with copy-ready output.

Parse URL query strings into table and JSON views with decoding, repeated keys, and copy-ready output.

Parse raw HTTP request/response headers, highlight auth/CORS/security headers, handle duplicates, and export as JSON.

Convert CSS values between px, rem, em, and percent with a configurable base font size and copy-ready results.

Explain regex patterns in plain English with token breakdowns and match previews for quick debugging and learning.

Build, parse, and validate cron expressions with presets and human-readable explanations.

Convert cURL commands to code snippets (fetch, axios, Python requests, PHP, Go, Java) with validation and quick presets.

Format or minify HTML with options for indent size and comments. Copy, clear, and load samples fast.