Postman Octet-stream Download [best] May 2026

Downloading files like images, PDFs, or spreadsheets often involves a response with the application/octet-stream content-type. Because Postman is primarily built for JSON and XML, it doesn't automatically "download" these binary streams to your hard drive when you click the standard button. Method 1: Use "Send and Download" (Best for Single Files)

The most direct way to save an octet-stream response as a physical file is to use the dedicated download command.

: Enter your API endpoint and set any necessary headers, such as Accept: application/octet-stream . postman octet-stream download

: Look for the blue Send button at the top right.

: Click the downward arrow next to the Send button and select Send and Download . Downloading files like images, PDFs, or spreadsheets often

If you have already clicked "Send" and the response body looks like a wall of unreadable binary text or symbols, you can still save it. How to download excel (.xls) file from API in postman?

* 7 Answers. Sorted by: 888. Try selecting send and download instead of send when you make the request. ( the blue button) https:/ Stack Overflow Saving API response in Postman to a file - Stack Overflow : Enter your API endpoint and set any

: Postman will prompt you to choose a location on your computer to save the file. Note that you may need to manually add the correct file extension (e.g., .pdf or .xlsx ) if the API doesn't provide it. Method 2: Save from the Response Window