Typescript | Download [repack] Base64 File

function downloadBase64Direct(base64Data: string, fileName: string, mimeType: string) { const linkSource = `data:${mimeType};base64,${base64Data}`; const downloadLink = document.createElement("a"); downloadLink.href = linkSource; downloadLink.download = fileName; downloadLink.click(); } Use code with caution.

To download a base64 file in , the most reliable method involves converting the base64 string into a Blob object and triggering a browser download via a temporary link . This approach ensures compatibility with large files and allows you to specify exact file names and MIME types. Method 1: Direct Data URL Download (Small Files) typescript download base64 file

If your base64 string already includes a prefix (e.g., data:image/png;base64,... ), you must strip it before using atob() to avoid errors. Method 1: Direct Data URL Download (Small Files)

For small files (like images or short documents), you can directly assign the base64 string to a link's href attribute. typescript typescript Safari and some versions of IE may

Safari and some versions of IE may not support the download attribute or might open the file in a new tab instead of downloading it.

Convert the binary string into a Uint8Array for raw byte handling. Blob Wrap the array in a Blob object with the correct MIME type. 4 Download

Use URL.createObjectURL(blob) to create a temporary link and trigger click() . typescript