A closer look at your files.

ViewerHub is a free local file viewer for data, documents, books and HEIC images. It runs on TanStack Start and React. No account or upload is required.

Practical limits

This is a viewer, not a professional editor or archival converter. Browser memory is finite; rendering and color can differ from the source application. Keep your original files. Downloads clearly identify their scope.

Acknowledgments

Parsing and rendering use DuckDB-Wasm, Apache Arrow, Papa Parse, lossless-json, fast-xml-parser, yaml, PDF.js, fflate, DOMPurify and libheif-js. Their respective licenses and notices apply.

• DuckDB-Wasm MIT notice
• PDF.js Apache license
• libheif-js LGPL license · decoder notices

Additional image/font codec notices are distributed with the local PDF resources. The libheif decoder is an unmodified, separately loaded module. Its source-distribution and codec notice audit remains a release prerequisite; this development build is not a statement of distribution clearance.