OmniViewer

6.7easy start · #12 of 31
in File Viewer Software

Free to practise onnot on record
Free trialnot on record
Well documentedyes
Runs where you workyes

Runs on Linux, Mac, Web, Windows.

Visit site Alternatives

OmniViewer is ranked #12 of 31 in file viewer software on The Geeks Club. It runs on Linux, macOS, Web, Windows.

Compared on file viewer software

Free plan: Yes
Primary access: web
Archive preview: Yes
Office file preview: Yes
Code file preview: Yes

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The record

File viewer: OmniViewer is a browser-based file viewer that displays raw content and a hex view with offsets and ASCII.
Editing: It lets users edit text files in place, including line-by-line editing of very large files, and download the result.
Format tools: Dedicated toolkits include JSON formatting and conversion, CSV tables and SQL, Markdown preview, and media metadata tools.
Local processing: The site says files are read in the browser and are not uploaded to a server.
Offline use: The viewer and its format tools continue to work after the page has loaded and the network is turned off.
Analytics: OmniViewer uses Google Analytics and says it sends only the page path, excluding URL queries, fragments, and file contents.
Sharing limit: The toolbar can create a URL containing file content in its fragment for content up to 32 KB.
CSV capacity: The CSV viewer offers sorting, filtering, SQL queries, export, and splitting, and the site says it was tested with a 21 GB, 100-million-row file.
PDF support: The PDF toolkit can extract text and images, inspect and remove metadata, and open password-protected PDFs; it does not perform OCR on scanned pages.
Supported computers: The PDF viewer works in a modern browser on Windows, Linux, macOS, or a phone, with no additional software required.
No backend: The site describes itself as static, with no application server, API, database, or upload endpoint.
Product: OmniViewer is a universal file viewer that runs in the browser and shows raw content and a hex view.
Large files: The site says file size is effectively unlimited and cites a 40 GB in-browser test of the same viewing engine.
File sharing: Files or snippets up to 32 KB can be shared in a URL whose payload is stored in the URL fragment.

Where it ranks on The Geeks Club

Best File Viewer Software in 2026#12 of 31

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Sources

omniviewer.org· checked 2 Oct 2026
omniviewer.org/s/privacy/how-we-use-google-analytics.h· checked 2 Oct 2026
omniviewer.org/csv· checked 2 Oct 2026
omniviewer.org/pdf· checked 2 Oct 2026
omniviewer.org/zip· checked 3 Oct 2026