Start with the document format.

JSON File Tools processes document contents locally, so most issues can be diagnosed without sharing the file.

JSON will not open

• Use JSON for one complete value, such as an object or array.
• Check commas, quotes, brackets, and trailing characters near the reported line and column.
• Confirm the file is no larger than 64 MiB.

JSONL or NDJSON will not open

• Put exactly one complete JSON value on each line.
• Blank and malformed lines remain available for review. Complete records must fit on one line.
• Use a .jsonl or .ndjson filename, up to 2 GiB.

Contact support

In desktop releases offering Contact support, enter a reply email and message, then submit the request. Feedback is a separate optional control for a sentiment and any message or reply email you choose to include. These forms send through PostHog and do not attach files automatically. Opening or cancelling a form does not submit its draft. If your installed version has neither control, use Support or feedback in the Loam dashboard. Include the app version, operating system, approximate time and non-sensitive error text. Do not include private document contents or credentials.