PDF Grayscale Converter
Convert every page of a color PDF to grayscale using a standard luminance formula. Free, private, runs entirely in your browser.
Click to select a PDF file, or drag and drop
Your file never leaves your browserHow to Convert a PDF to Grayscale
- Upload the color PDF you want to convert.
- Click Convert to Grayscale — every page is rendered as an image and each pixel is replaced with its luminance value using the standard formula
0.299R + 0.587G + 0.114B, which weights green highest since the eye is most sensitive to it. - Download the grayscale PDF — every page now uses only shades of gray, with no color information.
Example
A colorful marketing brochure with blue headers and orange highlights becomes a clean black-and-white document with proportional shades of gray, keeping relative brightness intact while removing all hue and saturation — ideal for black-and-white printing.
Common Use Cases
- Preparing a color document for a black-and-white printer or photocopier.
- Reducing toner/ink usage by removing color before printing large batches.
- Standardizing scanned color documents into a consistent grayscale archive.
FAQ
- How is this different from the Black & White Converter? Grayscale keeps a full range of gray shades based on each pixel's brightness. The Black & White Converter instead reduces every pixel to pure black or pure white using a threshold — grayscale looks like a black-and-white photo, black-and-white looks like a fax or line drawing.
- Will my text still be selectable afterward? No — converting to grayscale requires redrawing each page as an image, so text and vector content become part of a flattened, non-selectable image.
- Is my file uploaded anywhere? No — conversion happens entirely in your browser; the PDF is never sent to a server.