Supported Formats

Category	Formats
Markdown	`.md`, `.markdown`
PDF	`.pdf`
Spreadsheets	`.csv`, `.tsv`, `.xlsx`, `.xls`, `.xlsm`, `.xlsb`
Documents	`.docx`, `.rtf`
Presentations	`.pptx`, `.ppsx`
Code / Text	`.json`, `.xml`, `.yaml`, `.yml`, `.html`, `.htm`, `.txt`, `.log`
Images	`.png`, `.jpg`, `.gif`, `.webp`, `.bmp`, `.ico`, `.svg`, `.tiff`
Audio / Video	`.mp3`, `.wav`, `.ogg`, `.m4a`, `.flac`, `.aac`, `.opus`, `.mp4`, `.webm`, `.mov`, `.mkv`, `.avi`
Archives	`.zip`, `.tar`, `.tgz`, `.jar`, `.war`
Email	`.eml`
Binary / Unknown	`.bin`, `.dat`, `.hex` (hex viewer, plus manual open for any file)

Features

Auto-refresh — viewers reload automatically when the file changes on disk (external edits, git checkouts, rebuilds). In-viewer edits are preserved until saved; scroll position and page/zoom preserved for PDF and images.
Print — every viewer has a Print button; prints markdown/docs as formatted HTML, spreadsheets in landscape, presentations one-slide-per-page.
Image editor (Paint-lite) — draw/annotate/crop/rotate/resize on any non-SVG image with pencil, eraser, arrow, rectangle, ellipse, and text tools. Undo/redo, Save, Save As…
SVG split editor — code + preview side-by-side with live update; Ctrl+S saves.
Markdown clipboard-paste images — paste a screenshot in source mode and it writes to ./assets/ and inserts the markdown for you.
Markdown outline — slide-out heading nav.
CSV/XLSX — cell editing, sort, search, column resize, find & replace, multi-sheet.
Archive browser — preview or extract single files from zip/tar/tgz.
Diff command — FileKit: Diff Two Files for quick side-by-side compare.
Preview & Source toggle for all text-based formats
Search across all text-based viewers (Ctrl+F)
Zoom controls for Markdown, Documents, Images, and PDF
Syntax highlighting for JSON, XML, YAML, HTML, and log files
Mermaid diagrams in Markdown (can be disabled in settings)
Block editing in Markdown - click any block to edit it inline
Slide navigation for PowerPoint files with speaker notes
Style toggle between Obsidian and VS Code themes for Markdown/Documents

Settings

Setting	Default	Description
`filekit.markdown.fontSize`	`13`	Base font size (px)
`filekit.markdown.lineHeight`	`1.8`	Line height
`filekit.markdown.maxWidth`	`680`	Max content width (px)
`filekit.markdown.defaultStyle`	`obsidian`	`obsidian` or `vscode`
`filekit.markdown.enableMermaid`	`true`	Render mermaid diagrams
`filekit.csv.maxRows`	`5000`	Max rows to render
`filekit.pdf.defaultZoom`	`fit-width`	Default PDF zoom level

License

MIT