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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.
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.
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.