Validate JSON

JSON Validator checks whether your JSON can be parsed correctly and helps you spot syntax issues faster. It is useful for APIs, config files, test payloads, and debugging. When the JSON is valid, you also get a formatted preview without sending data anywhere. Whether you are optimizing for the NBN, preparing myGov submissions, or sharing files across Australia's vast distances, this tool keeps your files light and quick to transfer — even on regional, fixed-wireless, and satellite connections, with no upload required.

Australian internet ranges from fast NBN fibre in the capitals to satellite and fixed-wireless in regional and remote areas. Keeping files small is essential for reliable sharing across the NBN, for uploads to myGov and state services, and for delivering content to audiences on Telstra, Optus, and Vodafone mobile networks across vast distances.

• myGov and state government portals enforce upload limits — compress scanned IDs and documents before lodging them.
• For regional users on fixed-wireless or satellite NBN, smaller files mean fewer timeouts on slower, higher-latency links.
• Australian mobile plans often include data caps; pre-compressed media saves data for end users on the go.
• When sharing with New Zealand and Southeast Asia, smaller attachments transfer more reliably across trans-Tasman links.

1. 1
   Paste your JSON

   Copy your JSON into the input editor.

2. 2
   Run validation

   Check the JSON syntax in your browser and inspect any reported line or column details.

3. 3
   Use the preview or fix the error

   If the JSON is valid, copy or download the formatted preview. If not, fix the reported syntax issue and validate again.

• No upload — saves your NBN and mobile data allowance
• 100% free, no sign-up — no subscriptions or hidden fees
• Reliable on slower regional, fixed-wireless, and satellite NBN connections
• Batch processing for busy Australian workflows
• Works in any modern browser — nothing to install
• Privacy by design — your files stay on your device