Limits the maximum size of any single array allocation.
self.onmessage = function(e) const base64Data, contentType = e.data; const cleanBase64 = base64Data.split(',')[1] ; Use code with caution. 2. The Main Thread Script javascript javascript download large base64 file
Instead of converting the entire Base64 string to a binary array at once, process the string in smaller chunks (e.g., 1024 KB). This prevents the JavaScript engine from hitting allocation limits. javascript Limits the maximum size of any single array allocation
function downloadBase64AsFile(base64Data, fileName, contentType) // Remove data URI prefix if present const cleanBase64 = base64Data.split(',')[1] Use code with caution. Why This Works The Main Thread Script javascript Instead of converting
Call URL.revokeObjectURL(url) immediately after the download link click to free up browser RAM.
Most modern JavaScript engines enforce a maximum string length (often around 512 MB to 1 GB). Exceeding this throws a RangeError .