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Convert any PDF to dark mode, full color invert, sepia, or grayscale — permanently, not just as a display filter. Unlike PDF viewer night modes that only affect your screen, ihatepdf rewrites the actual color operators inside the PDF so the result is permanent in every viewer. Text stays fully selectable and searchable.
To invert PDF colors free, upload your PDF, choose a color mode, and download — the change is baked into the file, not just a screen filter. On ihatepdf, pick Dark Mode (inverted), Full Invert, Sepia, or Grayscale, and the new colors render correctly in every PDF viewer on every device. Text stays selectable, and your file is never uploaded to a server.
The reason most inverted PDFs look terrible is that inverting a colour is trivially easy and almost always wrong. Subtract every channel from its maximum and a white page does go black, which is the part people check — but the photograph on page four becomes a film negative, the blue hyperlink turns orange, the green tick in the table turns magenta, and a red warning box turns cyan. The document is readable and every visual cue in it is now lying to you. Dark Mode takes a different route: it converts each colour into hue, saturation and lightness, flips only the lightness, and eases the saturation back slightly. White backgrounds go near-black and black text goes near-white, exactly as you want, while a blue link stays blue and a photograph stays a photograph. Full Invert is still there if the raw negative is genuinely what you are after.
Almost every PDF reader has a night-mode toggle, and it only ever changes what that reader draws on that device. Send the file to someone else, open it on a phone, or print it, and it is blinding white again. This rewrites the colours inside the PDF itself, so the document is dark everywhere it is opened, including on an e-reader that has no night mode of its own and including at the printer — which is the other common reason to do this, since a mostly-black page inverted to mostly-white saves a startling amount of toner.
Most PDF apps that offer a "night mode" only recolor the document on your own screen — the file itself is unchanged, so the moment you open it on another device or send it to someone, it is bright white again. ihatepdf works differently: it permanently inverts the colors inside the PDF, turning white pages into dark backgrounds with light text that stays that way in every reader, including Chrome, Acrobat, Apple Books, Kindle, and mobile viewers. This effectively turns any PDF into a dark-mode e-book you can read at night without eye strain, then keep or share. Because the color operators are rewritten locally, your document is never uploaded to a server.
Dark mode reduces eye strain when reading long documents at night or in low-light environments. If you regularly read PDFs on a device that doesn't support automatic dark mode for PDFs — or if you want to send a dark-mode version to someone else — permanently converting the PDF's colors is the only reliable solution. ihatepdf rewrites the color data in the PDF structure itself, so the result looks correct in every PDF viewer without any viewer settings required.
Sepia mode applies a warm amber tone to the PDF — many readers find this softer on the eyes than both bright white and high-contrast dark mode. It is popular for reading long-form text documents, books, and academic papers. Grayscale mode removes all color from the document, reducing file size slightly and making documents suitable for black-and-white printing without color ink waste.
Not in Dark Mode. Naive inverters apply raw RGB inversion to every pixel, which is why a landscape photo comes out looking like film negative and a blue hyperlink turns orange. Dark Mode here inverts lightness while preserving hue, so a white page becomes near-black, black text becomes near-white, and a blue link stays blue. Photographs keep their colours and stay recognisable. If you actually want the negative effect, Full Invert still does raw RGB inversion.
Full Invert is the classic one-minus-the-value operation on each colour channel — the photo-negative look, and what most other inverters do by default. Dark Mode converts each colour to hue, saturation and lightness, inverts only the lightness, and damps saturation slightly so the result is not garish. For reading a document with charts, screenshots or photographs in it, Dark Mode is almost always what you want.
PDF viewer night modes apply a display filter to your screen only — the underlying file is unchanged. ihatepdf rewrites the color operators inside the PDF file itself so dark mode is permanent in every viewer on every device.
Yes. The tool transforms color operators without touching the text layer. You can still select, copy, and search text in the output PDF.
Yes. Because the color change is baked into the file, it renders correctly in every PDF viewer — Acrobat, Preview, Chrome, Edge, and mobile viewers.
No. The entire color transformation pipeline runs locally using WebAssembly. Your file never leaves your device.
Yes. The Grayscale mode converts all page content to black and white. This is useful for reducing printer ink costs or meeting submission requirements for greyscale-only documents.
Yes. Instead of a viewer that only inverts colors on your own screen, ihatepdf permanently inverts the PDF's colors so it reads in true dark mode in any reader — desktop, mobile, Kindle, or e-reader. Upload, choose Dark Mode, and download a night-friendly version you can read or share anywhere.
Inverting to a dark background uses more ink, but the Grayscale and high-contrast modes can reduce color-ink usage. For ink savings when printing, choose Grayscale; for comfortable night reading on screen, choose Dark Mode (inverted).
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