The quickest and most straightforward workaround is to reduce the payload size per request.
(often stylized as Zip-on-the-Fly) is not a standalone software product that you install. Instead, it is a backend server technology used by web applications to compress files in real-time.
Maya remembered a trick: instead of one giant ZIP, split the files into multiple smaller ZIPs of 500 MB each.
The ubiquitous PHP ZipArchive class, while powerful, has its own complexities when dealing with extremely large data. Specifically, the ZIP format originally had a total archive size limit. The ZIP64 extension was introduced to overcome this, but it must be explicitly enabled. In PHP, this is controlled by the ZIPARCHIVE::ZIP64 flag. If the extension is not available or ZIP64 is disabled, attempts to create archives larger than 4 GB will fail. Moreover, the ZipArchive class often buffers data in memory, making it unsuitable for true on‑the‑fly streaming of massive datasets. total size of requested files is too large for ziponthefly
Often limited to 2GB due to browser blob or 32-bit integer limits. to download these large file sets? Is there a workaround to download large files online?
Bonus tip: For web servers with “zip on the fly” plugins (like cPanel’s), the limit often exists to prevent memory overload. Splitting respects both server resources and file size restrictions.
Are you encountering the frustrating "Total size of requested files is too large for ZipOnTheFly" error while trying to compress files using the popular ZipOnTheFly tool? You're not alone. This error message has been a thorn in the side of many users who need to compress large files or folders for sharing, storage, or other purposes. In this article, we'll delve into the causes of this error, its implications, and most importantly, provide you with practical solutions to overcome it. The quickest and most straightforward workaround is to
Additionally, if you are using Nginx as a reverse proxy, ensure proxy_buffering is disabled to avoid memory blowouts:
You are likely here because you tried to download a massive batch of files from a web platform—such as Nextcloud, AEM (Adobe Experience Manager), or a custom enterprise portal—and were blocked by an error screen stating:
Roughly is the total folder you are trying to pull? Maya remembered a trick: instead of one giant
error_reporting(E_ALL); ini_set('display_errors', 1);
An even more modern alternative is , which supports async/await and can calculate the total ZIP size before generation begins, avoiding connection timeouts.
Curious about the artificial limit, Mina dug into ZipOnTheFly’s help pages. A terse explanation described resource constraints and anti-abuse safeguards: to prevent runaway compression tasks, the service limited on-the-fly zipping to a size threshold that balanced user experience with server load. They recommended chunking large exports or using scheduled bulk exports for very large data sets.