JSON Formatter

JSON

Loading JSON Formatter

Settings

JSON Formatter runs on your device

Runs in your browser

No uploads.There is no file-upload endpoint on duck.tools. This tool process your input inside this browser tab.
No tracking.No analytics and no tracking cookies. Sign-in uses a session cookie and loads Cloudflare Turnstile only when you open the account dialog.
We never see your data.Your file never reaches a Duck Tools server, so there is nothing for us to store, read or leak.

Formatting happens in this page. Your JSON stays in memory and is discarded when you leave.

To be precise: your browser still downloads this page, its scriptsover the network, and our web server keeps standard access logs. What never travels is the content you put into a local tool.

Read the full privacy page →

Your account

No password. We email you a sign-in link.

Human check

Saving presets across devices is next. For now this just signs you in.

How we handle your email

JSON Formatter

Pretty-print JSON and inspect it as text or a collapsible tree.

Paste JSON to format it with 2-space, 4-space or tab indent. Sort keys, browse a tree, and copy the result. Invalid input shows the line and column. Nothing leaves this tab.

How it works

Paste JSON or load a .json file into the editor.
Choose indent size and whether to sort object keys.
Read the pretty-printed document or expand the tree.
Copy or download the formatted output.

Also known as

json
format
pretty
beautify
inspect
tree

Related tools

JSON ValidatorCheck JSON syntax and see the line, column and a short hint.
JSON CompressorMinify JSON, optionally drop empty values and trim string whitespace.
JSON DesignerBuild JSON structures and datasets from a visual editor, then copy the result.

LOCALRuns in your browser

No uploads.There is no file-upload endpoint on duck.tools. This tool process your input inside this browser tab.
No tracking.No analytics and no tracking cookies. Sign-in uses a session cookie and loads Cloudflare Turnstile only when you open the account dialog.
We never see your data.Your file never reaches a Duck Tools server, so there is nothing for us to store, read or leak.

Formatting happens in this page. Your JSON stays in memory and is discarded when you leave.

To be precise: your browser still downloads this page, its scriptsover the network, and our web server keeps standard access logs. What never travels is the content you put into a local tool.

More json tools →Full privacy page →