Is this PDF dark mode tool free?

Yes, the PDF to Dark Mode Converter on SimplePDFTools.in is completely free with no signup required.

Are my PDF files uploaded to a server?

No. All processing runs entirely inside your browser. Your files never leave your device and are never sent to any server.

Can I export a dark mode PDF?

Yes. Use PDF – Flattened Visuals export to create a PDF that matches exactly what you see in the preview, including dark mode filters, annotations, watermarks, and redactions.

Why is the flattened PDF image-based?

The dark mode filter is applied to image pixels, so each page is rendered as an image in the exported PDF. This ensures the filter is visible in the output. Text may not remain selectable. Use the Original Source export if you need selectable text without the filter.

Can I add a logo or image watermark?

Yes. Use the Image / Logo Watermark section in the Watermark panel to upload a PNG, JPG, or WebP image and place it on your PDF pages with custom position, size, opacity, and rotation.

Can I export only selected pages?

Yes. Use the Smart Page Range buttons (All, Current, Odd, Even, First 10, Last 10, or Custom range like 1-3, 5, 8-10) to choose exactly which pages to export as PDF, ZIP, or JPG.

What is Low-Ink Print Mode?

Low-Ink Print Mode converts your PDF to a print-friendly format with a light background and dark text, reducing ink usage when printing. It is designed for printing and may override dark mode colors.

Why is there a 50MB file size limit?

All processing runs in your browser using device memory. A 50MB PDF can require significantly more memory after rendering pages, thumbnails, OCR, annotations, and exports. The limit helps prevent the browser from freezing, failing to export, or crashing on mobile devices.

Does this tool work on mobile?

Yes. The tool is mobile-friendly with a bottom navigation tab layout for small screens. For large PDFs, scanned PDFs, OCR, or heavy exports, a desktop browser is recommended for best performance.

Can I use OCR on scanned PDFs?

Yes. Use the OCR Extract section to run Tesseract.js OCR on scanned or image-based PDF pages. You can extract text from the current page or all pages and download it as TXT, MD, or DOC.

PDF to Dark Mode Converter – Free Online Dark Mode PDF Tool

Edit, annotate, filter, and convert your documents securely in your browser. No data leaves your device.

Drag & Drop PDFs here

or tap to browse from your device

Limits: Max 10 files • 50MB per file • 200 pages total

100% Secure

Client-side processing only. Zero backend uploads.

Pro Tools

Watermarks, annotations, OCR, and dark reading filters.

Fast Export

Export as PDF, JPGs, or ZIP instantly in the browser.

Why Use Our PDF Night Mode Editor?

Reading documents at night shouldn't strain your eyes. Our pdf dark mode tool instantly transforms harsh white backgrounds into soothing dark themes. Whether you want to invert pdf colors for a true black OLED experience or apply a warm sepia filter, you have full control over your reading environment.

Privacy is our number one priority. As a 100% secure pdf tool, everything runs locally on your device. There is absolutely no upload required. Your sensitive data never touches a backend server, allowing you to use this online pdf editor safely.

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Original Dark Mode

Tools & Settings

Dark Mode & Filters

Filter Intensity 100%

File Metadata

File--

Size--

Format--

Title

Author

Subject

Keywords

Creator

Watermark

Position

Size64px

Color

Opacity30%

Rotation-45°

Apply To

OCR Extract

Language

Target

Page Numbers

Add page numbers to export

Position

Format

Size

Color

Start at

Logo Watermark

Position

Size20%

Opacity70%

Apply To

Scan Enhancement

Contrast Boost for Scans

Boost Strength60%

Best for scanned or old PDFs with grey backgrounds. Increases contrast for clearer text.

Low-Ink Print Mode

Enable Low-Ink Print Mode

Converts pages to a print-friendly light/white background for less ink usage. Overrides dark mode filter in export.