Yes. The editor is completely free and runs in your browser with no install.

Does it validate JSON?

Yes. It shows errors with line numbers and suggests fixes for common issues.

Can I compare two files?

Yes. Open two panes side by side and view differences between them.

No. Editing and validation happen locally in your browser.

Does it support large JSON?

Yes. It handles relatively large files with fast format and minify tools.

JSON editor

Format, validate, compare, and transform JSON.

Errors

Copy

Transform

Compare

Errors

Differences

What does this JSON editor do?

It shows JSON in panels for edit, format, and a light compare so you can fix a missing brace or change a value without a raw notepad. It fits developers and anyone who maintains app config.

Paste or upload JSON, then use the panes. Auto-repair helps broken braces; still check meaning. Compare highlights differences between two pastes.

The editor runs in the browser; it does not push your config to your team server. Do not paste production keys on a public PC.

When do you need a JSON editor?

Fixing a config file broken by a trailing comma.

Comparing an API response before and after a change.

Editing a setting before you re-upload it.

JSON editor

Errors

Errors

Differences

Transform JSON