Compress Folder Online
Compress a folder online by dropping it onto the creator at https://freetoolonline.com/zip-tools/zip-file.html; it builds one .zip archive with sub-folders preserved and returns it as a download. No install needed on the sender or recipient.
FreetoolOnline Editorial Team| Property | Value |
|---|---|
| Format | Online tool, no install on the sender or recipient |
| Input | A whole folder (sub-folders preserved) |
| Output | Single .zip archive, downloaded to your browser |
| Max file size | 300 MB per file; up to 500 MB total archive |
| Retention window | Source files auto-deleted within 1 hour of build |
| Optional | Password (Standard / AES-128 / AES-256) |
| Privacy | Files uploaded over HTTPS; auto-deleted after a short retention window. No account. |
| Implementing tool | https://freetoolonline.com/zip-tools/zip-file.html |
The three-step recipe
Open the creator, drag the folder onto the upload zone, and click Convert. The folder structure stays intact inside the resulting archive, which is a property worth confirming when you hand off a project: the recipient unzips the .zip and finds the same nested layout you had on disk, not a flat dump of every file from every sub-folder. Name the archive in the Settings modal before you build it so the recipient sees something obvious on arrival ("q3-financials.zip" beats "archive.zip"). The output is a single .zip file, served back to your browser as a download.
When you need a password on the archive
If the folder is travelling through a channel where you cannot fully trust the recipient list - a forwarded email, a shared inbox, a chat group - the Settings modal exposes an optional password field with three encryption choices. Standard ZIP encryption is universally accepted but weak by current standards. AES-128 is the modern default, accepted by Windows Explorer (right-click Extract All) and macOS Archive Utility. AES-256 is the highest grade with the same compatibility ceiling as AES-128. Send the password through a separate channel - sending password and file together defeats the point. The password is applied at build time, so the recipient is prompted on extract.
What the creator does not do
The creator builds new archives - it does not crack the encryption on a .zip someone else built. It does not output 7z or RAR (both are denser than ZIP but require a third-party install on most recipient machines, so the creator stays on ZIP for cross-platform reach). It does not strip metadata from the input files: EXIF on a JPG, the author field on a Word doc, and the modification timestamps all travel into the archive unchanged. If that metadata needs cleaning, do so before uploading the folder.