Online JSON formatter
Frequently asked questions
Formatting, minifying and validating JSON
What does formatting JSON mean?
It means adding indentation, spaces and line breaks to make it readable. The content stays identical, only the way it is written changes. It is what you want for reading an API response, a configuration file or data to hand on.
What is minifying JSON for?
It strips every space, tab and line break that is not needed, leaving a single line string. The file weighs less, which matters when the data travels over a network or sits inside a configuration where readability is not the point.
Which errors does validation catch?
Syntax errors: missing or extra commas, unclosed brackets, unquoted keys, values that are not allowed such as undefined or NaN, single quotes in place of double ones, and comments, which standard JSON does not have.
Is my data safe here?
Yes: everything is processed in the browser with JSON.parse and JSON.stringify, the native JavaScript methods. Nothing is sent to a server, so you can paste API keys and private configuration without worry.
Does my data stay private?
Yes, and not because we promise it: this tool runs entirely inside your browser. What you type or upload never leaves your device, so it never reaches a server of ours and there is nothing we could keep, read or lose. You can check it yourself: open the page, disconnect from the internet, and the tool keeps working.
Do you store what I enter?
No. There is no database behind this tool: we do not store your files, your text or your results. When you close the tab nothing is left — not here with us, because it never arrived, and not anywhere else.
Do you profile me? Are you GDPR compliant?
We do not profile you: there is no account to create, we never ask for your email to use a tool, and we keep no profile of what you do. We are an Italian company and we work under the GDPR and the other European rules, with the privacy notice and the consent request in plain sight. One thing we say in full rather than hiding it behind a slogan: the ads on the page are Google's, and Google may use cookies to personalise them. You decide from the consent banner: if you say no the ads stay, but they are not personalised, and the tool works exactly the same.
If it is free, how do you make money?
From the ads on the page, and that is all. We do not sell your data, there is no hidden paid plan, there is no limit that eventually asks for your card, and you do not have to sign up. The ads pay for the servers and for the time we spend writing the tools: that is how we can keep them open to everyone.