Filepeek opens hundreds of file types in a browser without uploading them

An unfamiliar attachment usually arrives with a second assignment: figure out which application opens it. Filepeek puts a big drop target between you and that particular afternoon.

The Fileport-built site lists 659 supported file types and says, “Runs on your device” and “Nothing uploaded.” Its interface includes image export, video transcoding, document conversion and archive extraction. The counter covers many kinds of work, so the useful detail is the operation available for the file you actually have.

The interesting promise is where the work happens. A file viewer in a browser can look much like an upload service, even when the document never has to leave the device. If the maker’s processing claim holds, opening a private file would avoid giving a remote converter the contents. That distinction deserves more attention than the size of the format counter.

The page also offers a hex editor when a file can’t be opened normally. That is a refreshingly honest fallback. Bytes can still be inspected when the software can’t turn them into a pretty preview. The attachment has finally stopped saying, in effect, ask your IT person (who is currently you).

A long support list still needs to be read with the operation in mind. Being able to view a format, extract something from it and write a fully faithful replacement are different promises. A preview might be enough to identify an old file; editing it may demand the original application’s behavior. The useful question is what Filepeek can do with your particular file, and what survives the output.

That gives this utility a sensible first job: a nonessential sample of an awkward format. If the preview looks right, compare an exported copy with the original for the details that matter. A spreadsheet’s visible cells don’t tell you whether formulas or macros survived a conversion. An image’s dimensions don’t establish its color handling. File extensions have always been excellent at hiding a family argument.

The local-processing claim also doesn’t cancel a workplace’s rules about running web applications against sensitive material. A site can keep file contents local while still delivering application code over the network. That general distinction calls for a policy decision and, where needed, a technical review; a friendly privacy line can’t grant one on the company’s behalf.

Filepeek is most compelling as a quick way to answer what an odd file contains before buying or installing an application for it. If that works well for the formats you actually encounter, the value won’t depend on whether the list grows by another hundred. One successfully recovered file is considerably more interesting than a very impressive menu.

The site’s format tally is a starting point. What comes back out of the save dialog remains the practical test.

Attachment issues, with fewer attachments.