Piclizer

JSON Formatter & Validator

Make sense of unreadable JSON. Format it with the indentation you prefer, validate it with exact error positions, sort keys alphabetically, minify it for production, and explore the structure in a collapsible tree.

Input

Tip: press Ctrl/⌘ + Enter to format.

All processing is done locally in your browser. Your images never leave your device.

How to use

  1. 1

    Paste your JSON into the editor.

  2. 2

    Press Format to beautify it, or Minify to compact it.

  3. 3

    Fix any error using the reported line and column.

  4. 4

    Copy the result or browse the tree view.

Supported formats

Accepts

Produces

FAQ

Trailing commas, single quotes instead of double quotes, unquoted keys and missing brackets. The error message points to the exact line and column.

No. Only whitespace changes, unless you explicitly choose to sort keys.

Several megabytes work comfortably; extremely large files may slow the syntax highlighting.

Never. Parsing and formatting use your browser's own JSON engine.

Yes. Sorting is recursive and makes two versions of the same object much easier to compare.

About this tool: JSON Formatter & Validator

Readable, validated JSON in one paste

The JSON Formatter beautifies minified JSON into properly indented, syntax-highlighted structure — and validates it while it works, pointing at the exact character that broke your document if the JSON is malformed. Minify mode does the reverse, stripping every unnecessary byte.

JSON is everywhere in modern development: API responses, configuration files, logs, NoSQL documents. Reading a single-line response of 4,000 characters is impossible; formatting it reveals the structure in seconds. Validation matters just as much — a trailing comma or unquoted key breaks parsers with confusing errors, and this tool pinpoints the culprit.

Parsing and formatting run locally in your browser, so API responses with tokens, personal data and proprietary payloads stay on your machine. Sort keys for stable diffs, choose your indent size, and copy the cleaned result.

Like every Piclizer tool, this one runs entirely in your browser — your files stay on your device.

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