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I am receiving a prompt that says the file I'm trying to use when posting an image into copilot is the wrong format but it is saved as a JPEG.

Beaux Williamson 0 Reputation points
2026-05-30T20:37:06.0866667+00:00

I am receiving a prompt that says the file I'm trying to use when posting an image into copilot is the wrong format but it is saved as a JPEG.

Microsoft Copilot | Other
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  1. AI answer

    2026-05-30T20:37:22.7+00:00

    The most likely causes are either an unsupported scenario for image upload in Copilot, or a file type/extension issue even though the file appears to be JPEG.

    1. Verify that image upload is supported in the specific Copilot experience being used:
      • For the free Microsoft Copilot experience (copilot.microsoft.com), supported image formats include JPEG/JPG and PNG, among others.
      • For Microsoft 365 Copilot (work or school), image upload is supported for .png, .jpg, and .jpeg when using image/document inputs.
      • In some Microsoft 365 Copilot Chat experiences tied to personal (consumer) subscriptions, image upload may not be enabled; in that case, any image file (including JPEG) will be reported as unsupported.
    2. Confirm the file is truly a supported JPEG:
      • Ensure the file extension is exactly .jpg or .jpeg.
      • If the file came from email or another system, it may have been converted or renamed; try opening it and re-saving it as JPEG using an image editor, then upload again.
    3. Check size and limits:
      • For Copilot Studio image/document inputs, only PNG, JPG, JPEG, and PDF are allowed, and the total size of all files passed to the prompt must be ≤ 25 MB.
      • For Microsoft Copilot file upload, images must be in supported formats (PNG, JPEG, PJP, JFIF) and ≤ 50 MB.
    4. If using Microsoft 365 Copilot Chat with a personal account and image upload is not available in the UI (no option to select JPG/PNG, paste gives “file type not supported”), this is a limitation of that environment rather than the specific JPEG file.

    If the JPEG meets the format and size requirements and image upload is supported in the specific Copilot experience, but the error persists, test with another simple JPEG file and, if only one file fails, re-export that image as a fresh JPEG and retry.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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