⚫ Grayscale PDF Converter
Processing... Please wait.
Please select a color PDF file to convert all pages to grayscale.
🚀 How the Grayscale PDF Converter Works
You said:- **Select File:** Choose your PDF document (.pdf) from your device.
- **Initiate Conversion:** Click the black **Convert to Grayscale PDF** button.
- **Page Rendering:** The tool uses **PDF.js** to render each PDF page onto an invisible HTML.
- **Apply Grayscale Filter:** A JavaScript function reads the raw pixel data from the canvas and applies a mathematical formula to convert every colored pixel (RGB) into a single intensity value, effectively making it grayscale.
- **Generate New PDF:** The grayscaled image data from each canvas is then imported into **jsPDF**. This library creates a new, multi-page PDF document containing the optimized black and white images. **The entire process is client-side**, ensuring privacy.
❓ Frequently Asked Questions
1. Why convert a PDF to grayscale? +
Grayscale reduces file size and printing cost, making files better for archiving or sharing.
2. Does this process reduce quality? +
Not significantly. The rendering resolution is high, preserving clarity for text and images.
3. Is it secure? +
Yes — everything happens in your browser; nothing is uploaded to a server.
4. How is grayscale calculated? +
We use the luminosity formula: 0.2126R + 0.7152G + 0.0722B for natural tone balance.
5. Will text remain searchable? +
No. The output PDF contains images of text, not actual text layers.