Field notes for tricky files.

Identify a mystery file safely before choosing software.

Preview compatible documents and media using browser-local tools.

Investigate mismatched extensions, truncation and unsupported formats.

Avoid freezing your device when viewing oversized local text.

Understand quoted CSV fields and multiline records.

Locate JSON syntax problems and inspect valid documents safely.

Inspect one JSON object or value per line and find broken entries.

Inspect XML data without allowing active markup or network fetching.

Check an archive listing without running or extracting unknown files.

Identify EPUB structure and choose a compatible reader.

Understand Word document package parts without executing document content.

Locate workbook, worksheet and shared-string parts in XLSX packages.

Find slides and relationship files inside PowerPoint presentations.

Use magic bytes when a filename extension has been changed.

Compare local file checksums with a trusted publisher’s value.

Use browser-local previews without submitting private content to a web server.

Open a DOCX safely and recover readable paragraphs without installing office software.

Find readable cells in a Word table and recognize layout limitations.

Preview an Excel workbook without uploading it and understand cached formula results.

Understand repeated workbook text stored in the sharedStrings part of an Excel file.

Preview PowerPoint slide text in order without enabling any presentation features.

Read the separate notes parts of a PowerPoint file when present.

Open EPUB book text locally with chapter ordering from its package spine.

Inspect publication metadata without opening embedded web pages.

Use browser-local text previews for OpenDocument text, spreadsheets and presentations.

Inspect Rich Text Format safely and understand where formatting will be lost.

Inspect email sender, subject and body safely without signing in to an account.

Inspect meeting dates and summaries without adding unknown events to a calendar.