# Create a ZIP Archive Online — Without Uploading Anything

> Bundle any number of files into a ZIP archive entirely in your browser.

To create a ZIP file online, drop your files in and download the archive. Compression runs in your browser with DEFLATE at the level you choose, so files of any size are bundled without ever being uploaded — which is the difference between a private archive and one that passed through someone else's server.

**URL:** https://convertto.tech/t/zip-creator
**Category:** Browser & Device (https://convertto.tech/c/browser-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Limit:** Bounded by available memory, not by an upload cap
- **Compression:** DEFLATE, levels 0–9
- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Select your files — the file stays on your device and is never uploaded.
2. Enter or paste your archive name.
3. Set the compression.
4. Turn "Flatten folders into the root" on or off as needed.
5. Enter or paste your password.
6. Press Run, then download the result when it is ready.

## FAQ

### Why does my ZIP barely get smaller?

DEFLATE compresses redundancy, and JPEGs, PNGs, MP4s, MP3s and PDFs are already compressed — there is little left to squeeze. Text, CSV, JSON, logs and source code routinely drop by 70–90%. A ZIP of photos is about bundling, not shrinking.

### Can I password-protect the ZIP?

Not here. The original ZipCrypto cipher was broken decades ago and offers no real protection, and AES-encrypted ZIPs have no browser implementation solid enough to stake your data on. A tool that pretended otherwise would be selling false confidence — use 7-Zip or your operating system's own encryption instead.

### Does the archive keep my folder structure?

Yes, when you drop a folder rather than individual files — the browser reports each file's relative path and it is preserved inside the archive. Switch on "flatten" if you would rather everything sat in the root.

## Related tools

- [ZIP File Extractor](https://convertto.tech/t/zip-extractor): Look inside a ZIP, EPUB, DOCX or JAR and extract the files you want, in your browser.
- [7Z to ZIP Converter](https://convertto.tech/t/7z-to-zip): Convert 7-Zip (.7z) archives into universal ZIP format.
- [GZIP to ZIP Converter](https://convertto.tech/t/gzip-to-zip): Convert GZ files into standard ZIP archives.
- [RAR to ZIP Converter](https://convertto.tech/t/rar-to-zip): Extract RAR archives and repackage contents into standard ZIP format.
- [TAR to ZIP Converter](https://convertto.tech/t/tar-to-zip): Convert uncompressed TAR archives into compressed ZIP files.
- [ZIP to 7Z Converter](https://convertto.tech/t/zip-to-7z): Repackage ZIP files into high-compression 7Z format.
- [ZIP to TAR Converter](https://convertto.tech/t/zip-to-tar): Convert ZIP archive files to TAR format.
- [PDF to ZIP Archive](https://convertto.tech/t/pdf-to-zip): Package a PDF's text into a ZIP — one file per page, plus Markdown and HTML of the whole document.