PubToo · Guides
ZIP or 7z: packing, encryption, split volumes and extraction
Distinguish archiving from media compression, choose ZIP or 7z, check password and split-volume compatibility, and verify the contents before sending an archive.
An archive organizes files and folders for sharing or storage. It preserves the bytes of the files inside rather than lowering media quality like an image or video tool. Already compressed photos and videos may barely shrink when placed in ZIP or 7z.
Before choosing a format, find out what the recipient can open and whether passwords, hidden file names or split volumes are needed. Recovering the complete set of usable files matters more than the archive size alone.
1. Start with recipient compatibility
Consider ZIP for a routine handoff, then test it with the software the recipient will actually use. For 7z features such as solid compression, encrypted file names or split volumes, confirm that their extractor supports those features. Sharing a format name does not guarantee support for every compression and encryption method.
PubToo creates ZIP and 7z and extracts formats including ZIP, 7z, RAR, TAR and GZ. Reading RAR is different from creating it; PubToo does not create RAR archives. To make an image or PDF substantially smaller, process a copy with its appropriate media tool before packing the deliverable files.
2. Choose compression and password settings deliberately
If the goal is simply to combine already compressed media in a ZIP, compare storing the files without compression with standard compression. The 7z settings do not offer a Store option. Text and similar files may offer more savings. Stronger compression can take longer and does not guarantee a smaller result every time.
PubToo offers AES-256 password protection for ZIP and 7z; 7z can also encrypt file names. Password protection alone does not imply a hidden file list, so check both the setting and the result. Use a hard-to-guess password, send it through a separate channel and confirm that the recipient can decrypt the archive. PubToo does not save the archive password used for the operation.
3. Deliver split volumes as a complete set
Splitting can help when an individual attachment exceeds a service’s limit, but does not reduce the total bytes across all volumes. PubToo supports split 7z archives, rather than split ZIP. Keep every volume name and number intact, place the whole set in one folder and explain that they belong to one archive.
A missing volume can prevent complete extraction. The parts are not independent ordinary archives. Before sending, copy the complete set into a separate folder and use an extractor to check that all required contents can be recovered.
4. Verify the contents and allow space for extraction
Review the file and folder list for missing deliverables and unintended private files. Extract into a fresh folder, check the file count and directory structure, and open representative files. This also helps expose password, missing-volume or transfer-damage problems.
Expanded contents may be much larger than the archive, so check available storage first. Browse an unfamiliar archive before extracting and do not immediately run its programs or scripts. PubToo blocks unsafe paths, extracts into separate folders without overwriting existing files and asks before unusually large expansion. These protections do not establish that the contents are trustworthy.
Local processing and support
PubToo packs and extracts on the device; this website has no file-upload workflow. Check the product website for edition requirements and release status. If an archive fails to open, email contact@zinuto.com with its format, volume count, device system and error message. Do not include its password or private source files in the email.