Run tool
This online PDF grayscale tool converts colored document pages into clean black-and-white tones. It processes each page of your uploaded PDF by rendering the visual layout into a grayscale image and placing it onto a new page with the original page dimensions. Existing visual annotations are included during rendering, while transparency is disabled to produce uniform monochromatic output. You can customize the output detail using the render quality setting, which accepts values between 72 and 200 DPI. If you leave this setting blank, the conversion uses a default resolution of 120 DPI. Because each page is rasterized during the conversion process, the resulting PDF consists of page images, meaning selectable source text is converted into image content. When processing finishes, the tool provides the converted PDF document alongside the verified page count and the effective resolution applied to your document.
Instructions
- Select or upload a valid PDF document in the file input field.
- Optionally enter a render quality value between 72 and 200 DPI, or leave it blank to use the default 120 DPI.
- Run the tool to rasterize and convert each page to grayscale.
- Download the generated grayscale PDF and review the reported page count and resolution.
Examples
- Upload a 5-page color presentation PDF with default settings (120 DPI) to create a standard grayscale document suitable for monochrome printing.
- Upload a 2-page invoice and specify 150 DPI to convert color logos and stamps into crisp black-and-white raster pages.
FAQ
Does the grayscale conversion preserve selectable text?
No. The conversion renders each page into a grayscale image, so the output contains rasterized page imagery rather than selectable text.
What happens if I enter a DPI value outside the 72 to 200 range?
The tool automatically adjusts the value to the nearest allowed DPI: values below 72 are set to 72, and values above 200 are set to 200.
Are page annotations included in the converted output?
Yes. Existing document annotations are rendered directly into the grayscale image on each page.
What occurs if an empty or corrupted file is uploaded?
The tool checks whether the uploaded document is a valid PDF. If it is not, an error message appears and no conversion is performed.