Free developer tools, 100% in your browser

Format, validate and convert JSON, XML, HTML and more — instantly, privately, and free. Nothing is ever uploaded to a server.

JSON Tools

JSON Formatter & Validator

Format, beautify, minify and validate JSON online. Runs entirely in your browser — no data is uploaded.

JSON to XML Converter

Convert JSON to XML instantly in your browser. Free, fast and private client-side conversion.

XML Formatter & Validator

Format, beautify and minify XML documents online, directly in your browser.

HTML Formatter & Beautifier

Beautify, format and minify HTML markup online with instant client-side processing.

Base64 Encoder / Decoder

Encode or decode text and files to/from Base64 online. Supports file upload and download.

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No round-trip to a server — results appear instantly as you type.

Your data is processed locally in your browser and never uploaded.

No sign-up, no limits. Free tools for everyday developer tasks.