NimbleToolKit

Developer Tools

Validate and format JSON, inspect nested keys, parse URLs, and encode snippets with focused browser-based developer tools.

Work with JSON

Validate syntax first, format the value for reading, or inspect its key paths.

JSON ValidatorCheck JSON syntax in your browser and see an error when the input is invalid. JSON FormatterFormat minified JSON into readable, indented JSON. JSON Key ExtractorList key paths from a JSON object in your browser. Traverse nested objects and arrays without uploading your input. JSON MinifierMinify formatted JSON into a compact single-line string.

Convert data

Move between structured text formats or inspect an encoded payload.

CSV to JSON ConverterConvert simple CSV rows into JSON objects in your browser. JSON to CSV ConverterConvert JSON arrays of objects into CSV data. Base64 Encoder & DecoderEncode text to Base64 or decode Base64 back to plain text. JWT DecoderDecode JWT header and payload without verifying the signature.

Inspect web input

Parse and transform URLs, query strings, and small text patterns.

URL ParserBreak a URL into protocol, host, path, query, and hash parts. Query String ParserParse URL query strings into readable key-value pairs. URL Encoder & DecoderEncode or decode URLs and query string values. Regex Escape ToolEscape text so it can be used safely inside a regular expression.

More developer tools

UUID GeneratorGenerate random UUID v4 identifiers instantly. Hash GeneratorGenerate SHA-256 hashes from text using your browser. CSS MinifierRemove comments and extra spaces from CSS. JavaScript MinifierMinify simple JavaScript snippets by removing comments and extra whitespace. HTML MinifierMinify HTML snippets for lighter markup. Query String BuilderBuild a query string from key-value lines. HTML PreviewPreview a small HTML snippet safely in your browser. CSS Unit ConverterConvert px, rem, and em values for CSS layouts. Viewport Size CheckerCheck the current browser viewport width, height, and pixel ratio. User Agent ViewerView your browser user agent and platform details. HTML Tag CounterCount HTML tags in a snippet and list the most common tags.