Free QA & Test Tools

Test data generators, spec validators, locator builders, and comparison tools to speed up manual and automated QA workflows.

Your data stays in your browser

Sensitive inputs (tokens, passwords, keys, and configs) are processed locally in your browser and is never sent to a server.

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JSON Formatter

Prettify, minify, sort keys, and format API JSON responses.

Prettify and minify YAML, TOML, XML, HTML, CSS, and GraphQL.

Convert between CSV, JSON, Markdown tables, and reshape nested JSON structures.

Side-by-side diff for text, JSON, CSV, YAML, XML, and dotenv files.

Validate against schemas and estimate JSON payload sizes.

Extract paths, apply RFC 6902 patches, and merge JSON documents.

Parse .env files and convert Postman environments to dotenv format.

Build unsigned JWTs and inspect header and expiry claims.

Test XPath-like paths on XML and CSS selectors on HTML snippets.

cURL to fetch, status codes, headers, content types, and MIME lookup.

1–10 of 20

Per page