Create a monochrome copy of a color PDF
FigureOwl renders each PDF page, converts its visible colors, and rebuilds the pages into a new PDF. Choose grayscale to retain shades and gradients or strict black and white for a high-contrast result containing only black and white pixels.
Preview documents for ordinary monochrome printing
A grayscale copy helps you review whether colored headings, charts, photographs and callouts remain understandable without color. It can also be convenient when sharing a version specifically intended for a black-and-white office printer. Printer hardware and driver settings ultimately determine which inks or toners are used.
Grayscale keeps detail in photos and charts
Grayscale maps colors to brightness while keeping intermediate gray shades. It is the safer default for photographs, gradients, colored charts and shaded tables because visual differences are less likely to disappear completely.
Black and white creates a high-contrast copy
Black-and-white mode compares each pixel with a threshold. Darker pixels become solid black and lighter pixels become solid white. Adjust the threshold when faint text disappears or colored backgrounds become too dark. This mode works best for simple text documents and line art rather than photographs.
Choose standard or high rendering quality
Standard quality is suitable for many office documents and usually creates a smaller result. High quality uses more pixels for fine lines and small type, but takes longer and can create a much larger PDF. Documents above 50 pages should be split into smaller sections for reliable browser processing.
Understand the flattened output
The result preserves visible page appearance as rendered images. Text and links are no longer selectable, forms cannot be filled, comments and layers are flattened, accessibility structure is removed and digital signatures do not remain valid as interactive signatures. Always keep the original PDF.
Private browser-local processing
The source PDF is decoded, converted and rebuilt in browser memory. FigureOwl does not receive, inspect or retain the document. Processing time depends on page count, dimensions, complexity, rendering quality and available device memory.
Review before printing or distributing
Inspect pages containing colored charts, pale text, photographs and QR codes before using the output. Grayscale conversion is not a substitute for professional color separation, spot-color management, trapping or commercial prepress checks. For a searchable archive, retain the original alongside the monochrome copy.