All Tools

Format, validate, and beautify JSON online. 100% client-side — your data never leaves your browser.

Format, validate, and beautify XML documents.

Convert between YAML and JSON formats with full fidelity.

Convert CSV files to JSON with proper quoting and escaping.

Compare two JSON objects structurally with field-by-field diff.

Compare two text blocks line-by-line or word-by-word. Unified and split view. Shows added, removed, and changed segments with full color coding.

Live Markdown preview with GitHub-flavored syntax. Tables, task lists, code blocks, strikethrough. Side-by-side editor and rendered output.

Format and beautify SQL queries. 12 dialect options (PostgreSQL, MySQL, SQLite, MSSQL, BigQuery, Snowflake, and more). Keyword casing control.

Minify HTML, CSS, or JavaScript. Strips whitespace, comments, and unnecessary characters. Shows size reduction percentage.

Encode and decode Base64 strings and files. Client-side, safe for sensitive data.

Percent-encode and decode URLs per RFC 3986.

Decode and inspect JSON Web Tokens. Local-only — tokens never leave your browser.

Generate UUID v4 and v7 identifiers in bulk.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes client-side.

Generate QR codes for URLs, text, Wi-Fi, contact cards. Custom size, colors, error correction. Download as PNG or SVG. 100% client-side.

Generate strong random passwords with configurable length, character classes, and exclusions. Real entropy meter, crack-time estimate, bulk mode.

Convert between binary, octal, decimal, hexadecimal, and text (UTF-8). Handles arbitrary lengths. Per-byte and per-character views.

Encode and decode ROT13 and arbitrary Caesar shifts. Letter frequency analysis. 100% client-side.

Pick colors, convert hex/RGB/HSL/OKLCH, and check WCAG contrast.

Test regular expressions with live match highlighting and explanation.

Convert Unix timestamps, epoch seconds/milliseconds, and ISO 8601 dates.

Build and parse cron expressions with human-readable explanations.

Full HTTP status code reference with explanations and when to use each.

Count words, characters, sentences, paragraphs, and lines. Reading time estimate, char-limit indicators for X, LinkedIn, meta titles, and more.

Generate placeholder text — words, sentences, or paragraphs. Classic lorem ipsum plus alternatives (hipster, cupcake, pirate). HTML-wrapped output option.

Calculate IPv4 subnets — network, broadcast, usable range, wildcard mask. Input CIDR (/24) or dotted mask (255.255.255.0). Binary visualization.

Calculate aspect ratios (16:9, 4:3, 21:9, etc.). Given W:H and one dimension, get the other. Responsive padding-top % for CSS aspect-ratio containers.

Convert text between camelCase, PascalCase, snake_case, kebab-case, SCREAMING_CASE, Title Case, sentence case, and more. Bulk mode.

Extract every email address and URL from a block of text. Regex-based, case-insensitive, deduplicated, sorted output.

Parse any User-Agent string into browser, OS, device, and engine. Or detect your own. Built on the maintained ua-parser-js dataset.

Generate favicon package from any image or emoji. Multiple sizes (16, 32, 48, 180, 192, 512), manifest.json, and HTML snippet.

Visual CSS Flexbox playground. Live preview + copyable CSS. Control direction, wrap, justify, align, gap. Example child layouts.

Visual CSS Grid layout builder. Configure columns, rows, gaps, and named areas. Live preview with copyable CSS output.

Visual CSS box-shadow builder. Control offset, blur, spread, color, inset. Multi-layer shadows. Live preview + copyable CSS.

Compress JPEG, PNG, and WebP images in your browser. Adjustable quality, batch mode. Files never leave your device.

Convert px to rem, em, and percent — and vice versa. Configurable root font size. Bulk conversion mode for entire stylesheets.