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File is damaged after uploading into PDF.co via presigned url

It means that the file was damaged during the upload process. The most common reason is the use of incorrect Content-Type header.

If you use PUT to upload file then you must add the Content-Type header as application/octet-stream!

Do not use multipart/form-data for uploading file into a presigned link in PDF.co!

Incorrect

function uploadFile(file){
...

    const formData = new FormData();
    formData.append("file", file);

       await axios({
            method: 'PUT',
            url,
            data: formData,
            headers: {'Content-Type': 'multipart/form-data'}
          })
...
}

Correct (for PDF files)

function uploadFile(file){
...
        // upload file data directly
        // https://github.com/axios/axios#axiospatchurl-data-config
        await axios({
            method: 'PUT',
            url: url,
            data: file,
            headers: {'Content-Type': 'application/pdf'}
        })
...
}

Correct (for non-PDF files like images or documents)

function uploadFile(file){
...
        // upload file data directly
        // https://github.com/axios/axios#axiospatchurl-data-config
        await axios({
            method: 'PUT',
            url: url,
            data: file,
            headers: {'Content-Type': 'application/octet-stream'}
        })
...
}