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JSON Formatter

Format JSON

Paste JSON to validate and transform it. Parse errors show line and column; exports never leave this tab.

Runs in your browser. Inputs stay on this device — nothing is uploaded to BrowserSpaces for processing.

Pretty / minify

Readable or compact output.

Convert

YAML, CSV, JSON Lines, TypeScript interfaces.

Query

Simple dot/bracket paths.

Validate

Exact parse error locations.

Use the tool

How it works

Native JSON, local transforms

Parsing uses JSON.parse. Converters walk the value in memory to build YAML, CSV, or TS types.

Three steps

  1. 1

    Paste JSON

    Or load a .json file.

  2. 2

    Pick an action

    Format, convert, or query.

  3. 3

    Copy or download

    Take the result with you.