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CornerTools

Developer Tools

Developer tools to format, validate, encode, convert and generate the data you work with.

About Developer Tools

Developer tools that run in your browser, so JSON, tokens and API payloads you paste are never sent to a server. The one exception is the HTML Viewer: a page you preview loads the images, styles and scripts it links to.

Format and validate JSON, XML and SQL, compare JSON documents, convert between JSON and CSV, and check JSON against a schema. Encode and decode Base64 and URLs, decode JWTs, generate hashes, UUIDs and passwords, test regular expressions, build cURL commands, and convert number bases, colours, text to binary and Unix timestamps.