AnyNPC Tools - Free Online Tools

Base64 encoder and decoder. Encode text to Base64 or decode Base64 back to readable text with real-time auto-detection. Supports UTF-8 characters including emojis, Chinese, and other non-Latin scripts. Features include drag-and-drop file upload, one-click copy, and download results as text files. All processing runs locally in your browser — your data never leaves your device.

HTML entity encoder and decoder. Encode special characters (< > & " ') to HTML entities or decode entities back to readable text. Prevents XSS attacks and broken markup when displaying user-generated content or code snippets. Supports named entities, decimal (&#38;), and hex (&#x26;) numeric references. Features include encode-all-non-ASCII option, drag-and-drop file upload, one-click copy, and download results as text files. All processing runs locally in your browser — your data never leaves your device.

JSON formatter, validator, and beautifier. Format, minify, pretty-print, and syntax-highlight JSON data instantly. Features include key sorting, custom indentation (2/4 spaces or tab), line numbers, tree view, error highlighting with line/column position, drag-and-drop file upload, one-click copy/download. All processing runs locally in your browser — no server uploads.

JWT parser and debugger. Decode JSON Web Tokens instantly — view header, payload, and signature in readable format. Inspect registered claims (exp, iat, nbf, iss, sub, aud) with human-readable timestamps. Detects expired tokens, missing expiration, weak algorithms, and alg:none security issues. All processing runs locally in your browser — your tokens never leave your device.

Free online SQL formatter, beautifier, and minifier. Format and beautify SQL queries for MySQL, PostgreSQL, SQL Server, Oracle, SQLite, and 15+ dialects instantly. Features include keyword case conversion (UPPER/lower/Capitalize), custom indentation (2/4 spaces or tab), syntax highlighting with color-coded keywords, instant minification for production, real-time formatting as you type, drag-and-drop file upload, error detection with line positioning, and one-click copy/download. All processing runs locally in your browser — no server uploads.

URL encoder and decoder. Encode text to URL-safe percent encoding or decode percent-encoded URLs back to readable text. Supports UTF-8 characters including emojis, Chinese, and other Unicode scripts. Features include spaces-as-plus encoding for form data, uppercase hex option, drag-and-drop file upload, one-click copy, and download results as text files. All processing runs locally in your browser — your data never leaves your device.

Free online XML formatter, beautifier, and minifier. Format and beautify XML documents with custom indentation options (2/4 spaces or tab). Features include syntax highlighting with color-coded tags and attributes, instant minification for production use, real-time formatting as you type, drag-and-drop file upload (.xml), error detection with line positioning, one-click copy/download, and support for XML comments, CDATA sections, and processing instructions. All processing runs locally in your browser — no server uploads.

YAML to JSON and JSON to YAML converter. Transform YAML configuration files (Docker Compose, Kubernetes, CI/CD pipelines) to JSON format with real-time validation, syntax error detection, and precise line/column position. Supports YAML 1.2 features including anchors, aliases, merge keys, multi-line strings, and custom tags. Features include bidirectional conversion, customizable indentation (2/4 spaces), line numbers, drag-and-drop file upload (.yaml/.yml), one-click copy/download. All processing runs locally in your browser — no server uploads, perfect for sensitive config files.