This method decodes the ASCII string back into its original binary form before downloading, preventing potential "Corrupt File" errors seen with direct Data URI downloads. 3. Handling API Responses and Metadata
function downloadBase64AsBlob(base64, fileName = "document.pdf") { // Decode the base64 string to binary data const byteCharacters = atob(base64); const byteNumbers = new Array(byteCharacters.length); for (let i = 0; i < byteCharacters.length; i++) { byteNumbers[i] = byteCharacters.charCodeAt(i); } const byteArray = new Uint8Array(byteNumbers); // Create a Blob from the binary data const blob = new Blob([byteArray], { type: "application/pdf" }); // Create a temporary URL for the Blob const url = window.URL.createObjectURL(blob); // Download logic const link = document.createElement('a'); link.href = url; link.download = fileName; link.click(); // Clean up: Release the object URL from memory window.URL.revokeObjectURL(url); } Use code with caution. download base64 file javascript pdf
Some mobile browsers ignore the download attribute. In these cases, opening the Data URI in a new tab ( window.open(linkSource) ) may be the only way to allow the user to save it. This method decodes the ASCII string back into