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How to Use Free Online GZIP Unzip Tool - Complete Guide

Step 1

Select Your GZIP File

Choose the GZIP file you want to unzip. GZIP uses the GZIP file format specification:

•
Upload from computer: Click "Upload" and browse to your .gz, .gzip or .tgz file
•
Paste compressed data: Paste Base64-encoded GZIP data. Line breaks, URL-safe Base64 and a data: prefix are fine
•
Test with sample: Click "Sample" button to see how the tool works

Example: Compressed GZIP Input

Here's what compressed GZIP data looks like in base64 format:

H4sIAAAAAAACAzXMMQvCMBCG4T2/4uNmKeJUuhUs4lZwLA5HPOQgXkMSlSD+d6nV9eXhfTmAOMagnovORh1oz4VP1TwGK5Ji0iy0WdxDUv6ZXdM227Xe5ss9SKYOkwMA6scjDlzkyfUrsC4xapSgJv/YG4da1GcMdl26A87u/QGyoovokwAAAA==

Paste this string into the tool and you get the JSON shown in Step 2.

Step 2

Extract the File

The tool automatically unzips your GZIP file using the DEFLATE algorithm as soon as you upload it:

•
Automatic extraction: File is unzipped instantly in your browser
•
No server upload: All processing happens locally for privacy
•
Preview content: See extracted content immediately in the output panel

Example: Extracted Output

After unzipping, the original data is extracted:

{
  "application": "DataSync Enterprise",
  "version": "2.8.0",
  "modules": [
    "API Gateway",
    "Data Pipeline",
    "Analytics Engine"
  ]
}

The extracted content is now readable and ready to use!

Step 3

Save Your Extracted File

Save or use your unzipped content:

•
Download file: Click "Download" to save the original file byte for byte, named after the name stored in the archive or your .gz file when there is one
•
Copy text: Use "Copy" to put text content on your clipboard (binary content can only be downloaded)
•
Further processing: Use with other tools like JSON Formatter

Frequently Asked Questions

How do I unzip a .gz file?

Click "Upload" and pick the .gz file. It is unpacked straight away and, if it holds text, the text shows up on the right. Download saves the original file, named after the name stored inside the archive (or the .gz file name without ".gz"), and Copy puts the text on your clipboard.

Is GZIP unzip the same as gunzip?

Yes. gunzip is the Unix/Linux command for it; "unzip" is just the everyday word. Both take the GZIP compression off and give you back the original file. Note that .zip files are a different format: they need a ZIP extractor, and this page tells you so if you give it one.

Can I unzip .tar.gz files?

Partly. This page removes the GZIP layer, so a .tar.gz (or .tgz) gives you the .tar archive inside it. A .tar is binary, so it is not previewed, but Download saves it byte for byte. Open it with a TAR tool (for example tar -xf file.tar) to get the individual files.

Is this GZIP unzip tool secure?

The unpacking runs in your browser with JavaScript (the pako library). The file or text you give it is not sent to our server.

What file types can be inside a .gz file?

Anything: text, JSON, XML, CSV, logs, images, .tar archives. Text that is valid UTF-8 is shown in the output panel. Anything else gets a short note instead of a screen full of garbled characters, and Download still saves the exact bytes.

Do I need to install software to unzip GZIP files?

No, it works in the browser with no sign-up. If you need to do it from code, use Python's gzip module or Node.js zlib.

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