Will the text stay selectable?

Yes for full invert with "Keep text selectable" on: the original text is untouched and an inverting layer is drawn on top. Dark mode and sepia redraw each page as an image, so text there is not selectable.

What is the difference between invert and dark mode?

Invert flips every colour, so blue turns orange and photos look like negatives. Dark mode only flips lightness, so colours keep their hue and look natural on a dark background.

Why is the file bigger in dark mode or sepia?

Those modes redraw every page as an image. Pick a lower resolution to keep the file smaller.

Are the original colours removed?

With the selectable-text invert, the original page is kept underneath the inverting layer, so a PDF editor could remove the layer. Turn the option off (or use dark mode or sepia) for a permanent change.

No. The PDF is processed entirely in your browser and never leaves your device.

Does it work on scanned PDFs?

Yes. A scanned page is an image, and all three modes work on it.

Invert PDF Colors

Turn a white PDF into a dark one for comfortable night reading. Full invert keeps text selectable; dark mode keeps colours recognisable. Runs in your browser - your file is never uploaded.

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Is this the right tool?

Reading a PDF at night with a dark background

Use full invert to keep text selectable, or dark mode to keep colours natural.

A scanned PDF

Every mode works on scanned pages.

Saving ink when printing

A dark page uses far more ink. Convert to black and white instead.

Convert PDF to black and white

Features

Full invert that keeps text selectable and searchable
Dark mode that keeps hues (blue links stay blue)
Sepia mode for warm, paper-like reading
Choose the resolution for image-based output
Preview the first page before downloading
100% private - processed in your browser

Why invert a PDF

Reading at night

Bright white pages are harsh in a dark room. A dark copy is easier on the eyes.

E-readers and tablets

Readers without a built-in dark mode for PDFs can open the inverted copy.

Light sensitivity

Some readers find light text on a dark background less tiring.

Invert, dark mode or sepia?

Full invert

Every colour flips: white pages turn black, black text turns white, and photos look like negatives. With "Keep text selectable" on, the tool adds an inverting layer on top of each page instead of redrawing it, so text still selects and searches and the file stays almost the same size.

Dark mode

Dark mode flips only the lightness of each colour. Backgrounds go dark and text goes light, but a blue link stays blue and a red heading stays red. Pages are redrawn as images to do this, so text is no longer selectable.

Sepia and grayscale

Sepia gives warm, brownish tones that many people find comfortable for long reading.
For black and white printing, use PDF to black and white instead.
Dark-mode copy too large to share? Compress it to an exact size.