Verified no-login tool
Drop pdf file here or
Your files are secure
Upload, invert, read at night.
Select your PDF — the tool shows the page count.
Hit Invert Colours — every page is re-rendered with inverted colours.
Wait for the progress bar to finish.
Download the dark-mode PDF.
Built for speed, privacy and reliability — on any device.
White backgrounds become dark and text becomes light — perfect for night reading.
Each page is rendered at high resolution and inverted — not just a CSS trick.
Scanned documents, reports and books all work.
Inversion runs locally — your PDF never reaches a server.
No account, no limits, no watermarks.
No — inverted pages are re-rendered as images. This is the trade-off for true colour inversion at the pixel level.
Pages are converted to JPEG images. Text-only PDFs become larger but photos-heavy ones may stay similar or shrink.
No. Inversion runs entirely in your browser.
Yes. Output files conform to the PDF standard and open correctly in Adobe Acrobat, Adobe Reader, macOS Preview, Chrome, Firefox and all other major PDF viewers.
The tool works in all modern browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, Safari and Opera. We recommend keeping your browser up to date for the best experience.
Dark mode — invert every page’s colours