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FormatPeek

Free viewers for MPP, MSG, EML, XPS, DBF, Winmail.dat & VCF

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FormatPeek opens files that don't open easily anywhere else: Microsoft Project (.mpp), Outlook messages (.msg), email (.eml), Winmail.dat attachments, XPS documents, vCards (.vcf) and dBase/FoxPro (.dbf) tables — directly in your browser. No install, no account, no file library. Uploads are deleted immediately after parsing, and DBF files never leave your browser at all. Built for the moment someone sends you a file your everyday software can't open.

PH · launched Sep 29, 2026 · 1 upvote (top 69%) · 2 views

Niche: developer data and local file viewers · 49 launches, 9 in the last 7 days · Explore this niche →

Category and tags
  • Horizontal
  • Dev tools
  • Prosumer
  • Not AI
  • Commercial product
  • Web App
  • Productivity

Visit website ↗ Source listing ↗

More like this: all 49 launches in developer data and local file viewers →

Could you build this?

Partial While standard web viewers are easy to build, parsing legacy binary formats (MPP, MSG, XPS, DBF, and Winmail.dat/TNEF) in-browser requires compiling complex native C/C++ format parsers to WebAssembly or running dedicated backend conversion microservices.

What it would actually take: Requires either a backend conversion pipeline running tools like LibreOffice, libmspack, and readpst or a suite of client-side WebAssembly modules compiled from C/C++ legacy file-format libraries. Handling corrupted or proprietary Microsoft compound document binaries (OLE/CFB for MSG/MPP) and rendering them accurately in DOM/Canvas demands specialized reverse-engineered file parsing expertise.

Competitors

Other products that read as similar to this one : 119 launches clear the similarity bar, closest 8 shown.

Attention rank: #98 of 120 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 291 days after the earliest competitor.

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.