Comparison
ZIP Manager vs Foretaste, for archives on the web
Both open an archive from a link without saving it first. Foretaste also opens the files inside it, and many other kinds of file, in the same tab, and shows how much of each it read.
Everything said about ZIP Manager (zip, rar, 7z) here is in its own words, from its own listing or policy, read on 12 October 2026. Sources
01
Side by side
| What | ZIP Manager (zip, rar, 7z) | Foretaste |
|---|---|---|
| Opening an archive that is still on the web | Browse remote ZIP archives without having to download them first S2 The same page says: for remote content, the extension needs to fetch a portion of the archive, which may take some time. | A ZIP is listed from the index at its end, over byte ranges. Measured: a 40 MB archive listed for about 67 KB, and one small file inside it opened for 97 bytes. The amount read is shown under the file. If the host refuses ranges, Foretaste reads the whole file and says so. |
| Where the archive is read | Works offline without any server being involved for file extraction S2 The privacy policy adds: If a link is provided, the extension downloads the ZIP binary from the provided server. | The file is fetched from the site hosting it and read in Foretaste's own tab. No file, file name or page address goes to a Foretaste server, and the build fails on any network beacon. |
| Archive formats | The extension supports almost all known archiving formats including ZIP, RAR, 7Z, and ISO. S2 | ZIP, TAR, GZ, TGZ, Zstandard, 7z, RAR, bzip2, xz, lzma, and, less tested, cab, iso, cpio, ar and lzh. Only ZIP (and one member of a plain tar) is read by range. 7z and RAR are read whole. |
| Files that are not archives | Open a local and remote ZIP, RAR, 7Z, or any other archive format S1 The listing describes archives. It does not describe drawing a document, sheet or picture found inside one. | Opens documents, spreadsheets, slides, PDFs, pictures, audio, video, subtitles, fonts, databases and datasets, including ones inside an archive, in the same tab. |
| Data the extension collects | This extension does not collect any user data S3 The store listing also says: The developer has disclosed that it will not collect or use your data. | No analytics in the extension. The build fails on any network beacon. Free readers make no request on Foretaste's own behalf. |
02
Foretaste, reading an archive on the web
The real viewer, running on this page. Nothing is installed and nothing is uploaded: scroll it, press things.
The real Foretaste viewer listing field-trip.zip, a 20 MB archive, from 66 KB read, running on this page.
ZIP archive20 MBFiles 9Unpacked 20 MB
- Folders
- 3
- Packed
- 20 MB · no smaller than its contents
- Type
- application/octet-stream
Read 66 KB of 20 MB. The rest never left the server.
How this was read
- Asked how big it is—
- Read the first 1.0 KB to see what it is1.0 KB
- Asked for the last 66 KB66 KB
- Asked for 568 B, starting 20 MB in568 B
Processed locally · Foretaste reads files on your device and does not upload them.
Unrecognised file · 4 files · 20 MBTable · 1 file · 13 KBText file · 4 files · 1.3 KB
Top-level folders: data, notes, raw
- 14 KB
- 13 KB
- 908 B
- 242 B
- 120 B
- 122 B
- 20 MB
- 5.0 MB
- 5.0 MB
- 5.0 MB
- 4.5 MB
- 157 B
- 5.0 MB
- 5.0 MB
- 5.0 MB
- 4.5 MB
- 13 KB
- 908 B
- 157 B
- 122 B
- 120 B
Look for a word in the 5 text files inside this archive, without unpacking it.
Read on your machine. Nothing was uploaded, and field-trip.zip wasn't saved unless you asked for it.
What the site said about this file
- Name
- field-trip.zip
- Kind
- ZIP archive
- Reported type
- application/octet-stream
- Size
- 20 MB
- Partial reads
- Supported. Foretaste can read part of the file without fetching all of it.
- Address
- http://localhost:8795/field-trip.zip
Reads the whole file to compare against a published checksum. Nothing is sent anywhere.
The questions people ask
Is Foretaste an alternative to ZIP Manager (zip, rar, 7z)?
For looking inside an archive that is still on the web, yes: both open it from a link without saving it first. Foretaste also opens the documents, spreadsheets, databases and pictures inside it in the same tab, and shows how much of the archive it read.
Does ZIP Manager download the whole archive?
Its support page says that for remote content it “needs to fetch a portion of the archive”, and its privacy policy says that when given a link it “downloads the ZIP binary from the provided server”. Foretaste lists a ZIP from the index at its end and shows the amount it read under the file: about 67 KB of a 40 MB archive.
How much of a remote archive does Foretaste read?
Only the index at the end of a ZIP, then only the files you open: about 67 KB to list a 40 MB archive, and 97 bytes to open one small file inside it. The amount is shown under the file, counted as it is read.
Sources
Where each claim comes from
Read on 12 October 2026, and checked again by 12 April 2027. If a source has changed by then, this page changes with it.