ZIP file creator

Build a zip archive from your own files. Everything happens in this browser — nothing is uploaded.

1 · Choose files

Files to include

Pick as many as you like, from as many folders as you like — each selection is added to the list below.

Files that will go into the archive
File	Size	Remove

2 · Options

Archive name

Compression

Already-compressed files — JPEG, PNG, MP4, MP3, PDF — will barely shrink, and an archive of them can even come out slightly larger. Zip earns its keep on text: code, CSV, logs and documents. Whatever happens, the real before and after sizes are reported.

Nothing is uploaded

Almost every "zip files online" tool sends your files to a server, compresses them there and sends an archive back. That means handing over whatever you are zipping — contracts, photographs, payroll, coursework — to somebody else's machine, and trusting a retention policy you cannot check.

This one does the work in your browser. The files are read by the page, compressed by the page and saved by the page. Nothing is sent anywhere, which you can confirm for yourself: open your browser's network tab while you use it, or disconnect from the internet after the page loads and watch it carry on working.

Choosing a compression level

Level 6 is the default and is the right answer nearly always. Going to 9 typically buys a percent or two on ordinary documents while taking noticeably longer, and level 0 stores the files without compressing them at all, which is occasionally what you want when the contents are already compressed.

Which brings up the thing people are most often surprised by: JPEGs, PNGs, MP4s, MP3s and PDFs are already compressed. Zipping them will save you very little and sometimes nothing. Zip is at its best on text — source code, CSV, logs, Word documents — where 70% or more is normal. The tool shows you what you actually saved rather than implying every archive is a win.

Folder structure is kept

Drop a folder in and the paths inside it are preserved, so unzipping gives you back the same tree rather than a heap of loose files.

What it is good for

Attaching several files to an email as one item, and getting under an attachment limit.
Sending a set of documents where the order and grouping matter.
Bundling source code or a site export.
Making one archive out of things scattered across several folders.

Limits worth knowing

Because it runs in the browser, the practical ceiling is your available memory rather than an upload quota. A few hundred megabytes is comfortable on a normal machine; multi-gigabyte archives are better made with a desktop tool. Very large jobs will make the page busy while they run.