Free Online Developer Tools

Format, validate, repair, minify and explore JSON online. JSON runs locally in your browser with tree view, error detection, copy and download options.

Compare two JSON objects side-by-side online. Highlight structural diffs, added keys, deleted values, and modified properties instantly.

Test JSONPath expressions online and instantly find matching JSON values. Explore JSONPath syntax, filters, arrays and nested properties in your browser.

Convert JSON objects into clean TypeScript interfaces and types automatically. Fast browser-based JSON to TS converter.

Flatten nested JSON into dot notation or unflatten JSON back into nested objects. Free online JSON flattener with custom separators and browser-based processing.

Convert JSON data into JSON Schema online. Paste a JSON object and automatically infer property types, required fields, arrays, nested objects and schema structure.

Build JSON Schema online using a visual schema generator. Add properties, choose data types, mark required fields and generate valid JSON Schema.

Validate JSON data payloads against a JSON Schema online. Instant schema compliance testing and detailed validation error reporting.

Visualize JSON Schema definitions as interactive graphical trees and human-readable documentation online.

Convert JSON data arrays and nested JSON objects into clean, tabular CSV files for Excel and spreadsheets instantly.

Convert JSON payloads into clean, readable YAML (YML) format online instantly with custom indentation controls.

Convert JSON objects into structured XML documents online instantly. Secure, browser-based JSON to XML conversion.

Convert JSON arrays and nested data into downloadable Microsoft Excel (.xlsx / .csv) spreadsheets directly in your browser.

Convert Microsoft Excel (.xlsx/.xls) spreadsheets into clean JSON arrays or objects online. Multi-sheet support with client-side processing.

Compress and minify JSON data online. Remove whitespace and line breaks to minimize payload size and save network bandwidth.

Unescape JSON strings online. Remove backslashes, unescape quotes, tabs, newlines, and Unicode characters from stringified JSON.

Detect syntax errors and automatically repair malformed or invalid JSON online. Fix trailing commas, unquoted keys, and single quotes.

Parse, inspect, and navigate JSON data online. Explore objects, arrays, and primitive data types with an interactive tree viewer.

Escape JSON strings for use in JavaScript, Java, Python, and C# source code literals. Handles quotes, backslashes, and newlines.

Compare two plain text files line-by-line online. Highlight added, removed, and modified text with inline diff view.

Convert strings to URL-friendly slugs, camelCase, snake_case, PascalCase, Title Case, and UPPERCASE.

Deduplicate text lists, sort lines alphabetically or numerically, and strip empty lines.

Build, test, match, and replace regular expressions with real-time highlighting and group extraction.

Encode special characters into percent-encoded URI strings and decode query string params.

Escape HTML special characters into entities or decode HTML entities back into readable text. Free browser-based HTML encoder and decoder.

Encode text to Base64 or decode Base64 back to readable text online. Supports UTF-8, Unicode and developer-friendly Base64 conversion directly in your browser.

Generate cryptographic checksum hashes including MD5, SHA-1, SHA-256, and SHA-512 instantly.

Generate single or bulk cryptographically secure UUID v4 strings for database keys and APIs.