--- title: "Dark Mode PDF — Invert PDF Colors Online Free | PDFWix" url: https://www.pdfwix.com/dark-mode-pdf description: "Turn any PDF into dark mode online free. Invert PDF colors for comfortable night reading on phone, tablet or e-reader, processed inside your own browser." lang: en --- Skip to content All tools (https://www.pdfwix.com/) # Dark Mode PDF — Invert PDF Colors Online Free Turn a bright white PDF into a dark, eye-friendly version for night reading on a phone, tablet or e-reader. Free and processed in your browser. Updated July 2026 · Reviewed by the PDFWix Team (https://www.pdfwix.com/about/team) Reading a research paper or a textbook in bed means staring at a full page of white light. Some readers offer a night mode, but many — including most phone browsers, printers' proof viewers and e-ink apps — do not, and the setting never travels with the file. PDFWix Dark Mode PDF creates a permanently dark copy of your document: soft grey pages with light text that you can open in any reader, on any device. To make a dark mode PDF free: open PDFWix Dark Mode PDF, add your PDF, leave the soft dark grey setting on and click Make a dark mode PDF. You get a dark copy that opens the same way in every reader — keep your original, because the dark version's text is no longer selectable. 0 of 3 free conversions used today Best for text documents, papers and ebooks Pages are drawn and re-coloured inside this browser tab, so the file is never uploaded. The dark copy is made of page pictures, so its text is no longer selectable — keep your original for searching and copying. Want this in your History? Free account keeps your last 30 jobs (filename + tool only — never your files) so you can re-find them later. Create free account →: https://www.pdfwix.com/auth?tab=signup ## Common next steps Grayscale PDF Convert a colour PDF to black and white to save ink and file size. https://www.pdfwix.com/grayscale-pdf Compress PDF Reduce file size while keeping the best quality possible. https://www.pdfwix.com/compress-pdf PDF to PNG Convert each PDF page into a lossless PNG with transparency preserved. https://www.pdfwix.com/pdf-to-png 🔒 Browser-side processing · Never uploaded · 100% free ## Soft dark grey vs a full negative A straight negative flips white to pure black and black to pure white. It works, but the very high contrast can be tiring, and photographs turn into unreadable negatives. The soft setting instead lands the page on a dark grey around #1e1e1e with text near #e6e6e6 — closer to the night themes used by e-readers and code editors, and much easier on the eyes over a long session. There is one honest trade-off. Because PDF colours live inside page drawing instructions, changing them means redrawing each page and saving it as a picture. That keeps the layout perfect but removes the text layer, so the dark copy cannot be searched or copied from, and its file size is usually larger. Always keep the original: use it with PDF to Text & Markdown (https://www.pdfwix.com/pdf-to-text) when you need to quote a passage, and run the dark copy through Compress PDF (https://www.pdfwix.com/compress-pdf) if it is too big to email. Switch on "leave photos and charts in their original colours" to keep figures readable in a paper. ## How to make a dark mode PDF 1. 1 ### Add your PDF Drop in the paper, textbook or report you want to read at night. 2. 2 ### Pick the quality Recommended suits most documents; choose Sharp for dense diagrams or Screen for a smaller file. 3. 3 ### Choose the look Keep soft dark grey for comfortable reading, or switch it off for a full negative. 4. 4 ### Download Click Make a dark mode PDF. Your original file stays exactly as it was. ## Tips for dark mode PDFs ### Always keep the original The dark copy is picture-based, so use the original when you need to search or copy text. ### Keep figures in colour Switch on the colour option so charts and photographs in papers stay readable. ### Shrink afterwards Picture-based PDFs get big — Compress PDF (https://www.pdfwix.com/compress-pdf) brings the size back down. ### Printing instead? Never print a dark PDF. Use Grayscale PDF (https://www.pdfwix.com/grayscale-pdf) to save colour ink. ≈ #1e1e1e in soft mode Background colour Removed — pages become images Text layer 100% in your browser Processing Results measured on a sample of 500 PDFs across scanned documents, photo portfolios, and office reports. ## Ways to read a PDF in dark mode | Method | Works in every reader | Keeps selectable text | Travels with the file | Cost | | --- | --- | --- | --- | --- | | PDFWix Dark Mode PDF | ✓ Yes | ✗ No | ✓ Yes | Free | | Acrobat night mode | Acrobat only | ✓ Yes | ✗ No | Free viewer | | Phone system dark mode | Rarely for PDFs | ✓ Yes | ✗ No | Free | | E-reader invert setting | That device only | ✓ Yes | ✗ No | Free | Comparing a converted file with reader settings. ## Why use PDFWix to convert PDFs? A converted file means dark mode everywhere, including readers that have no night setting. - **Works in any reader.** The colours are in the file, so phones, tablets, e-readers and browsers all show it dark. - **Easier on the eyes.** Soft grey pages cut the glare of a full white page in a dark room. - **Saves battery on OLED.** Dark pixels draw less power on OLED phones and tablets during long reading sessions. - **Private.** Papers and confidential reports are re-coloured inside your browser and never uploaded. Keep the original for quoting and searching — PDF to Text & Markdown (https://www.pdfwix.com/pdf-to-text) pulls out passages, and Compress PDF (https://www.pdfwix.com/compress-pdf) shrinks the dark copy if it is large. For printing, Grayscale PDF (https://www.pdfwix.com/grayscale-pdf) is the right tool instead. Printing rather than reading? Grayscale PDF (https://www.pdfwix.com/grayscale-pdf) saves colour ink. For page pictures use PDF to PNG (https://www.pdfwix.com/pdf-to-png), and Compress PDF (https://www.pdfwix.com/compress-pdf) keeps the dark copy small enough to email. ## Common uses for converting PDFs - Reading research papers and textbooks at night without glare - Studying long documents on an OLED phone to save battery - Making lecture slides comfortable to read on a tablet in a dark room - Giving a PDF a dark theme for a reader app that has no night mode - Creating a high-contrast negative for a specific accessibility need ## Frequently asked questions ### How do I make a PDF dark mode? Open PDFWix Dark Mode PDF, add your PDF and click Make a dark mode PDF. You get a dark copy that opens the same way in any reader, for free. ### How do I invert the colors of a PDF? Switch off the soft dark grey option to get a full negative, where white becomes black and black becomes white. ### Can I still select text in the dark PDF? No. Re-colouring means the pages are redrawn as images, so keep your original for searching and copying. ### Will the dark PDF be bigger? Usually yes, because pages become pictures. Choose the Screen quality setting or run it through Compress PDF. ### Does it work on phones and e-readers? Yes. The colours are baked into the file, so any reader on any device shows it dark. ### Is my PDF uploaded? No. Pages are drawn and re-coloured inside this browser tab. ## More PDF tools ### Grayscale PDF ### Compress PDF ### PDF to PNG ### PDF to Text & Markdown Extract PDF text as clean Markdown or plain text for AI prompts and notes. https://www.pdfwix.com/pdf-to-text ## Related PDF tools Grayscale PDF: https://www.pdfwix.com/grayscale-pdf Compress PDF: https://www.pdfwix.com/compress-pdf PDF to PNG: https://www.pdfwix.com/pdf-to-png PDF to Text & Markdown: https://www.pdfwix.com/pdf-to-text Merge PDF: https://www.pdfwix.com/merge-pdf Split PDF: https://www.pdfwix.com/split-pdf ## Structured data ```json [ { "@context": "https://schema.org", "@type": "WebApplication", "@id": "https://www.pdfwix.com/dark-mode-pdf#app", "name": "Dark Mode PDF — PDFWix", "applicationCategory": "UtilitiesApplication", "applicationSubCategory": "PDFApplication", "operatingSystem": "Any — runs in browser on Windows, macOS, Linux, iOS, Android", "browserRequirements": "Requires a modern web browser", "offers": { "@type": "Offer", "price": "0", "priceCurrency": "USD", "description": "100% free online browser tool" }, "aggregateRating": { "@type": "AggregateRating", "ratingValue": "4.9", "ratingCount": "1329", "bestRating": "5", "worstRating": "1" }, "description": "Turn any PDF into dark mode online free. 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