Nivra: Dark Mode PDF Viewer by bhyreshbs

Nivra opens PDFs in a fast, local viewer that makes them easier on your eyes, without ever changing the original file.

Display modes
- Smart Dark: dark pages with photos, charts and diagrams kept in their real colors, on the page and in the thumbnails
- Original, True Invert, Grayscale and High Contrast
- Brightness and contrast sliders
- One-click profiles: Reading, Night, Study, Focus, Original
- "Remember for this site" (or for local files) to keep a look per website
- Your last settings are restored every time

A complete viewer
- Page thumbnails and an outline (bookmarks) panel
- Search, zoom, fit-to-page/width, two-page view, rotate
- Document properties, print, and download a transformed copy
- Open any local PDF by dropping it on the Nivra popup
- Keyboard shortcuts (Ctrl+F search, Ctrl+B sidebar, R rotate, Ctrl+P print)

Private by design
Everything happens on your device. No accounts, no uploads, no analytics, no remote code.

Tip: allow Nivra's site access when the popup asks, so PDF links open in Nivra. Firefox keeps PDFs saved on your computer in its own viewer; drop one on the Nivra popup to read it in Nivra.