Read PDFs at night without eye strain
Turn any PDF into a comfortable dark theme in seconds — free, unlimited, and entirely in your browser.
100% private
Files never leave your device. All conversion runs in your browser — no uploads, no accounts, no tracking.
Text stays text
Real vector conversion — your text is not turned into pictures. Search, copy-paste and OCR layers keep working.
Works on scans
Scanned pages and full-page images are recolored too, including fragile FineReader scans with OCR layers.
How it works
- Drop a PDF. It opens instantly with a dark preview — page one renders right in the browser.
- Pick a theme. Soft Dark is tuned for night reading (light grey on near-black, not harsh white on black). True Black for OLED screens, Warm Night for less blue light, or dial in your own colors.
- Download the dark PDF. The converter recolors every page with precise blend math and gives you a new file that opens dark in any reader, on any device.
Not another “invert my screen” hack
Most dark-mode tricks — OS smart invert, browser extensions, reader themes — only change how a PDF looks on your screen. They break on long documents, turn photos into negatives, and vanish the moment you send the file to your tablet, Kindle, or a colleague.
This tool converts the document itself. White backgrounds become a deep, comfortable near-black; black text becomes soft light grey. The result is a normal PDF file: keep it, print it, send it to your e-reader.
And unlike many online converters, pages are not rasterized. Text remains real vector text — sharp at any zoom, fully searchable, and your OCR layer survives.
Made for night readers
- Students and researchers reading long papers and textbooks after dark.
- Musicians with sheet music on an iPad — no more blinding white pages on a dim stage.
- E-ink and tablet owners (reMarkable, Boox, Kindle via send-to-kindle) whose devices lack a real dark mode.
- Anyone light-sensitive — migraines, photophobia, astigmatism — who needs calm grey-on-dark instead of glaring white-on-black.
Need the opposite — a dark PDF made light for printing, or a faint scan made darker? Use the presets on our Darken PDF page. Want an exact color negative? See Invert PDF Colors.
Frequently asked questions
Can you turn a PDF into dark mode?
Yes. Upload the PDF above, pick a dark theme preset, and download the converted file. The document itself is converted, so it opens in dark mode in any PDF reader — no extensions or special apps needed.
Does PDF have night mode?
The PDF format has no built-in night mode. Some readers can recolor the view, but that setting lives in the app, not the file. Converting the file itself gives you a permanently dark PDF that works everywhere.
How is this different from Dark Reader or a browser extension?
Extensions restyle web pages — and sometimes a PDF viewed in the browser — but they cannot produce a dark PDF file you can keep, print, or send to a Kindle or tablet. This tool converts the document itself.
Does it work on scans?
Yes. Full-page scan images are recolored too, and the invisible OCR text layer is preserved, so text search and copy-paste keep working after conversion.
Are my files uploaded anywhere?
No. All processing happens locally in your browser with client-side JavaScript. Your file never leaves your device — you can even disconnect from the internet after the page loads.