OpenAnyFile
Works
Viewing, inspecting and verifying. You get the contained stream, and if it is a tar it opens as a browsable archive tree. File details, exact byte size and the detected signature are always shown.
How to open a .gz file
GZ files come from Unix tooling, web servers, and the usual advice — buy the software that made it — is rarely what you need just to look inside one. This page covers what the format is and how to open it in a browser tab.
What is a .gz file?
Gzip Compressed File is an archive format developed by Jean-loup Gailly & Mark Adler, first appearing in 1992. It is normally produced by Unix tooling, web servers.
Compresses a single stream, so it cannot bundle multiple files by itself. Written to replace the patent-encumbered Unix compress utility.
| Full name | Gzip Compressed File |
|---|---|
| File category | Archives |
| MIME type | application/gzip |
| Magic bytes (file signature) | 1F 8B 08 |
| Developer | Jean-loup Gailly & Mark Adler |
| Introduced | 1992 |
| Usually created by | Unix tooling, web servers |
| OpenAnyFile engine | gzip decompressor |
| Opens without upload | Yes — parsed locally in your browser |
Open a .gz file in your browser
OpenAnyFile routes .gz to its gzip decompressor, which decompresses the contained stream, and if it is a tar it opens as a browsable archive tree.
- Open the OpenAnyFile opener in this browser — nothing to download or sign up for.
- Drag your .gz file onto the drop zone, click to browse for it, or paste it with Ctrl+V.
- The extension is detected and the file is handed to the gzip decompressor.
- Your GZ opens on its own viewer page: the contained stream, and if it is a tar it opens as a browsable archive tree.
- Use fullscreen for a closer look, or download the file back out unchanged. No account, no upload, no watermark, no file-size gate.
What you can and cannot do with it here
Does not work
Editing and re-saving. OpenAnyFile is a reader, not an editor — for changes you still need special software or an equivalent.
Is it safe to open a {E} file on a website?
It depends entirely on whether the website uploads it, and almost all of them do. That is a real problem when the archives file in question is a contract, a client deliverable or something under NDA. OpenAnyFile removes the question: the decoding happens inside your browser tab, so there is no transfer, no queue, no temporary storage and no retention window to read about in a privacy policy.
Frequently asked questions about GZ files
Can I open a .gz file without installing special software?
Yes. OpenAnyFile's gzip decompressor runs in your browser, so you can read a GZ file with nothing installed. You get the contained stream, and if it is a tar it opens as a browsable archive tree. For full editing you still need the original application — this is a viewer, not an editor.
How can I check a file really is a GZ file?
Look at the first bytes rather than the extension. A genuine GZ begins with 1F 8B 08. Opening the file in OpenAnyFile shows that signature in the file-details panel, so a file renamed to .gz by mistake is easy to spot.
Is it safe to open a GZ file online?
With OpenAnyFile, yes, because nothing is uploaded. The file is read locally through your browser's File API and never leaves your device, so there is no server copy to leak, log or retain. That matters most for the kind of file people are least willing to hand to a random converter site.
What is a .gz file, exactly?
Gzip Compressed File — an application/gzip format created by Jean-loup Gailly & Mark Adler since 1992. Compresses a single stream, so it cannot bundle multiple files by itself. Written to replace the patent-encumbered Unix compress utility.
Does the same viewer handle formats related to GZ?
Yes — the same engine also opens .tgz, .001, .7z, so you can compare related files without switching tools.
Related formats
These open with the same engine, so if you have one of these sitting next to your .gz file, it will open too: