Open an Archive Without Installing Anything
Archives arrive constantly, a set of photos from a colleague, a download that bundles its documentation, an export from a service that ships everything in one file. On a locked-down work machine or a borrowed computer, the usual answer is to install something, which is exactly what you cannot do.
This extractor unpacks archives in the browser tab. It lists what is inside first, so you can see the contents before pulling out anything, and you can take a single file rather than the whole thing.
How to Extract an Archive
The listing step is worth using rather than skipping, because it tells you what you are about to unpack.
- Drop the archive onto the box above, or click to select it from your device.
- Wait for the listing. Each entry shows its name, its size and its compressed size, so you can spot an unexpectedly large file before extracting it.
- Extract a single file by choosing it from the list, useful when you want one document out of a large archive.
- Or extract everything at once if you need the full contents.
- Save the extracted files where you want them. Nothing is written anywhere until you choose to download.
- Check the folder structure in the listing before extracting everything, since some archives unpack into the current directory rather than into a folder of their own.
What the Listing Tells You
A ZIP file keeps a central directory at the end listing every entry with its name, sizes and a checksum. Reading that directory is cheap and requires no decompression, which is why the contents appear almost immediately even for a large archive while extraction itself takes longer.
Comparing the stored size against the original is informative in itself. Text, code and documents typically compress to a fraction of their size, while an archive of JPEGs or MP4s is barely smaller than its contents, because those formats are already compressed. An archive that has barely shrunk is usually full of media rather than badly made.
Archive Formats
What each format is, and whether it can be opened here.
| Format | What it is | Supported |
|---|---|---|
| .zip | Container plus compression, the general default | Yes |
| .gz | Compression only, a single file | Yes |
| .tar | Container only, no compression | Common on Unix systems |
| .tar.gz / .tgz | A tar file then compressed with gzip | Two steps: decompress, then untar |
| .7z | Higher compression, different algorithm | Needs a dedicated tool |
| .rar | Proprietary format | Needs a dedicated tool |
The tar and gzip split confuses people reasonably often: tar bundles files without compressing, gzip compresses a single file without bundling, and .tar.gz is simply one applied after the other.
Password-Protected and Very Large Archives
An encrypted archive cannot be opened without its password, and this tool does not accept one, the file will list but not extract. That is a limitation rather than a security claim; use a desktop tool if you have the password.
Size is bounded by memory, because the archive and the extracted output both sit in the browser. A few hundred megabytes is comfortable on a laptop and less on a phone. If a very large archive stalls, extracting individual files rather than everything at once usually gets you what you need.
One habit worth keeping is to read the entry names before extracting everything. An archive from an unfamiliar source can contain paths that unpack outside the folder you expected, and a listing makes that visible in a way that a blind extraction does not. The same glance also catches the archive that turns out to hold a thousand files rather than the four you wanted.