Convert PDF to Greyscale — Remove Color from PDF
Batch convert color PDF documents to high-quality black-and-white greyscale. Choose from multiple greyscale methods for the best result — upload multiple files, they convert automatically. All processing stays in your browser.
Key Features
Color to Greyscale Conversion
Convert color PDF pages to black-and-white greyscale. Each page is rendered at high resolution, pixel colors are converted using your chosen method, and the result is saved as a new PDF.
Multiple Greyscale Methods
Choose from three conversion methods: Luminosity (ITU-R BT.709, most accurate for human perception), Average (simple RGB average), or Lightness (HSL midpoint). Each produces different visual results.
Batch File Support
Upload multiple PDF files at once — they convert automatically after upload. Each completed greyscale PDF appears in the results list for individual download, or download all as a ZIP archive.
100% Private & Secure
All conversion happens locally in your browser using PDF.js and pdf-lib. Your PDF files never leave your device — no uploads to any server, complete privacy.
No Installation Required
No software to download or install. The entire converter runs in your browser — works on any device with a modern browser.
About This PDF to Greyscale Converter
Our PDF to Greyscale converter renders each PDF page to a high-resolution canvas using PDF.js, applies pixel-level greyscale conversion, and embeds the result back into a new PDF using pdf-lib. Three greyscale methods are available: Luminosity uses the ITU-R BT.709 formula (0.2126R + 0.7152G + 0.0722B) which matches human perception of brightness; Average takes the simple mean of RGB values; Lightness uses the HSL midpoint between min and max RGB values. Luminosity is recommended for the most natural-looking results. The output is a standard PDF file with all colors removed, suitable for black-and-white printing, archival, or further processing. All processing stays local in your browser.
How to Convert PDF to Greyscale — Step by Step
Converting a PDF to greyscale with our tool is simple:
Upload Your PDFs
Drag and drop one or more PDF files onto the upload area, or click to browse and select files from your device.
Choose Greyscale Method
Select your preferred greyscale method from the options panel. Luminosity is recommended for natural-looking results. Adjust the quality slider for higher or lower output resolution.
Download Greyscale PDF
Files begin converting automatically after upload. Each completed greyscale PDF appears in the results list. Use Download All to batch download all files as a ZIP archive.
Important Notes
This converter renders each PDF page as a raster image, applies greyscale conversion at the pixel level, and embeds the result into a new PDF. The output PDF contains images of the original pages — text will not be selectable or searchable. For editable text output with greyscale appearance, consider printing to greyscale from a PDF reader. All processing is client-side — your files never leave your device.