i ilham.dev

Tool guides

Zip Builder Guide

Bundle several files into a zip archive in the browser, with a choice of compression level.

Bundling files is not always about making them smaller; sometimes it is about keeping them together. ZIP Builder lists the archive contents and resulting size, with a choice of compression levels. The archive is assembled in the page from the bytes already on your disk, so nothing is uploaded, and a compression level lets you trade a little time for a smaller download.

Bundle two small files

Choose one or two throwaway files with Files. The Contents table should list each one with the name it will carry inside the zip and its size, and the Archive line shows the total compressed size. Switch Compression to Store only, no compression, then to Fastest, and watch the Archive size change. Choose Download zip to save the archive under Archive name, and Remove a row to drop a file.

A zip cannot hold two entries under one name, so a second file with the same name becomes name-1, then name-2, and the table shows the rename rather than losing a file. Store only is the right choice for files that are already compressed, such as JPEGs or another zip. The archive is assembled in memory, so a few hundred megabytes is fine on a desktop but heavy on a phone, and the files are never uploaded.

Where your input goes

Processing runs in your browser. The tool does not upload your input to ilham.dev.

For more background, read Browser File Tools.

Questions you might have

Why do two files with the same name both survive?
A zip cannot hold two entries under one name, so the second becomes name-1, then name-2 and so on. That keeps both files instead of quietly losing one.
Which compression level should I use?
The balanced level suits almost everything. Store only is quicker and is the right choice for files that are already compressed, such as a JPEG or another zip, where no level can help.
Is there a size limit?
Only what your device’s memory allows, since the archive is built in the page. A few hundred megabytes of photographs is fine on a desktop and heavy on a phone.