About ZipPeek
ZipPeek is a ZIP viewer that runs entirely in your browser tab. Drop an archive on it and you get what a desktop file manager would give you — a folder tree, a sortable list of every entry with its real and packed size, and a preview pane — except that nothing is uploaded, nothing is installed and nothing is extracted to your disk unless you ask for it.
It exists because the usual options are both bad. Uploading an archive to a website to see what is inside means handing a stranger a copy of it; installing an archiver to look at one file is disproportionate. Reading a ZIP's index is a small, well-defined job, and a browser has had everything needed to do it — the File API and a built-in deflate decoder — for years.
The privacy claim is structural rather than a promise. The site is a set of static files with no backend to receive anything: no accounts, no analytics, no third-party scripts, no network requests at runtime. Your language and theme preferences are kept in this browser's local storage and nowhere else.
It is built and maintained by Interhive OÜ, a small studio in Tallinn that makes tiny, dependable web tools.
What it does
Read the index, not the archive
ZipPeek parses the end-of-central-directory record and the central directory itself, including ZIP64 records and archives with a stub in front. Entry bytes are fetched one at a time, only when you open or download something.
Browse like a file manager
A folder tree, breadcrumbs, a sortable list with size, packed size, saving, method, timestamp and CRC, a glob filter, and a flat view of every entry at once.
Preview most things
Text and code with highlighting, JSON pretty-printed, Markdown rendered, images, SVG as a plain image, font specimens, audio and video — and a hex dump with a named file signature for everything else.
Say what looks wrong
Path traversal, absolute paths, drive letters, backslashes, symlinks, duplicates, encrypted entries, nested archives, deep paths and compression ratios over 100× are each listed with a plain explanation.
Take only what you need
Download a single entry, or tick several and get a new ZIP built in the page. Paths are normalised when repacking, and the result tells you how many entries had to be fixed.
Two languages, two themes
The whole interface, every guide and every warning exists in English and Russian, in a light and a dark theme, and your choice is remembered in this browser only.
What it does not do
It cannot open password-protected entries, because it carries no ZipCrypto or AES implementation. It does not read RAR, 7z or tar.gz. It does not render PDF pages. It cannot decode compression methods beyond store and deflate, since those are the only two a browser implements natively. And it does not create archives from scratch — repacking a selection of entries is the closest it gets.
Get in touch
Found an archive ZipPeek reads wrong, or a format it should recognise? Email us — we read everything.
support@interhive.org