JSON5 Formatter

Definition

Format JSON5 in the browser. On JSON Nova, the workflow runs entirely in your browser with no server processing of your data. Suitable for sensitive payloads, large files, and offline use as a PWA.

Format JSON5 in the browser. Private. For dev workflows and asset prep. See also JSON to CSV, JSON Formatter, and JSON Validator.

Run everything in your browser with Monaco Editor on JSON Nova—100% client-side, no server uploads, large-file friendly. Install as a PWA for offline use.

Guide and tips

Developer guide

Short, practical notes—workflow, common mistakes, and pro tips—with links to related tools.

Format JSON5 consistently

Format JSON5 in the browser. Private. For dev workflows and asset prep.

All processing stays in your browser. Paste production-shaped samples without uploading secrets.

Editor-native behavior

Match project style (tabs vs spaces, width) before you commit.

Related: JSON Formatter, JSON Validator.

Common mistakes

Formatting minified production bundles you should not rewrite by hand—use the right tool for source files.

Mixing formatter output with linter rules that disagree (ESLint, Prettier conflicts).

Pasting secrets into shared sessions; keep tokens out of examples.

Pro tips

Format on save in the IDE; use this page for quick one-off fixes and reviews.

Related: JSON Formatter, JSON Validator.

Quick reference

What is this JSON5 tool?

Formats **JSON5** locally. Useful before deploy or code review.

Use cases

  • Smaller assets (consistent style).
  • Readable JSON5 in docs.

Common errors

  • Syntax errors block format.
  • Very large files may be slow.

Best practices

Validate in your build. Pair with related language formatters in the same hub.

Performance and privacy

Performance

Leverage the power of Monaco Editor and Web Workers. Our toolkit is optimized for files up to 50MB, providing real-time transformations without lag.

Privacy

Your data stays local. Conversions and formatting run 100% in your browser—nothing is sent to our servers.

Frequently asked questions

FAQ

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What is JSON5?

An extension to JSON that allows for programming comments, trailing commas, and easier quoting rules.

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Can I convert JSON5 back to regular JSON?

Yes! Our engine takes JSON5 as the input and can format it cleanly into standard JSON.

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Does it strip comments?

If outputting to standard JSON, comments are safely stripped since standard JSON strictly disallows them.

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