---
title: "Extract .Z Files Online — Unix Compress | Compress Pro"
description: "Open unix .Z (compress) files right in your browser — decompress ancient archives and .tar.Z chains without installing anything. No uploads. Free."
canonical: https://compress-pro.com/extract-z
---

# Extract .Z files.

> Ancient unix .Z archives, opened right in your browser.

Decompress unix .Z files right in your browser — **the 1980s compress format, opened with nothing installed and nothing uploaded**. Old distribution archives, university mirrors and legacy backups come back as their original files; a .tar.Z unwraps all the way through.

**No uploads · No ads · Free & open source.**

## How it works

1. Drop files anywhere on the page, click to browse, or paste with Ctrl/⌘ + V.
2. Pick a quality or preset — or set an exact target size and let the tool find it.
3. Compress, compare before/after, and download — individually or as a ZIP.

## A format older than the web

.Z predates gzip: it is the output of compress(1), built on 1984-vintage LZW, and modern systems often ship without the tool that reads it — exactly why a browser page is the convenient way in. Chains like source.tar.Z unwrap both layers automatically, first the .Z stream, then the tar bundle. Newer single-file cousins live on [Extract GZ](https://compress-pro.com/extract-gz), and everything else archive-shaped opens on [Zip & Unzip](https://compress-pro.com/zip-files).

## .Z and .gz, side by side

gzip was written specifically to replace compress — LZW was patent-encumbered in the early 90s, and the free replacement also happened to compress better. The family resemblance comes with clear tells:

| Trait | .Z (compress) | .gz (gzip) |
| --- | --- | --- |
| Era | 1984 to the early 90s | 1992 onward |
| Algorithm | LZW — the patent that started it all | DEFLATE, patent-free by design |
| Natural habitat | FTP mirrors, tape backups, SunOS-era sources | Everything since |
| Compression | Modest | Noticeably tighter on the same input |

## Frequently asked questions

### What created these .Z files?

The unix compress utility, standard through the eighties and nineties — FTP mirrors, tape backups and source distributions of that era are full of them.

### What about .tar.Z files?

Recognized and unwrapped in one pass — the .Z layer is decompressed, then the tar bundle inside unpacks to its files automatically.

### Can I create .Z files here?

No — the format is obsolete for new archives. Make .gz or .xz instead; every system that reads .Z also reads those.

### Is it private?

Yes. The archive is opened and unpacked on your own device — its contents are never uploaded, and a password, if one is needed, is used locally and never transmitted. The server does nothing but deliver this page. Want proof? Run one file through, switch your connection off, and run another — it still works.

## Related tools

- [Extract GZ files](https://compress-pro.com/extract-gz)
- [Zip & Unzip files](https://compress-pro.com/zip-files)
- [Extract TAR.GZ tarballs](https://compress-pro.com/extract-tar-gz)

---

Part of [Compress Pro](https://compress-pro.com/) — every tool page has a markdown twin at `<page url>.md`. Full tool index: [llms.txt](https://compress-pro.com/llms.txt)