Postman: collection import failed or "format not recognized"
Last reviewed 2026-09-19
A Postman collection is a JSON file with a required structure (an info block with a schema URL, items with requests). Hand-edited or generated collections often contain trailing commas, headers written as objects instead of arrays, or a missing schema, and Postman then refuses them.
Messages you might see
- “Import failed: format not recognized”
- “Unable to import the collection”
- “Invalid JSON in the collection file”
Why it happens
- The JSON itself is invalid (comments, trailing commas).
- The info block or schema URL is missing or wrong.
- Headers or scripts written in a shape Postman does not accept.
- A very old v1 collection.
Try this first (free, no tool needed)
- Validate the JSON in an editor or JSON validator first.
- Compare with a small collection exported from Postman itself.
- Import a smaller part of the file to find the item that fails.
If that didn't work
These tools run in your browser. Your file is read and repaired on your own device and is never uploaded.
Broken Postman Collection Repair
Makes the JSON parseable (comments, trailing commas), then fixes the info block and schema URL, request methods, headers written as objects instead of arrays, body modes, script.exec given as a string and items missing a name. v1 collections are detected and explained rather than converted.
Open Broken Postman Collection RepairCommon questions
Will my requests still work?
It repairs the structure Postman needs. Test the requests afterwards, as their URLs and credentials are yours to check.
Is my file uploaded anywhere?
No. The tool runs as a program inside your own browser, so the file is read and repaired on your device and never sent to a server.