What does PDF to Grayscale do?
PDF to Grayscale is a free online tool that can convert a color PDF to grayscale. The PDF result from PDF to Grayscale is a separate copy to inspect before you use it elsewhere. One possible use is reports checked for monochrome printing.
Grayscale PDF format change rewrites color information into a gray color model using Ghostscript. It is useful for reviewing how a report will look without color or preparing a monochrome reading copy.
Colors that looked distinct on screen may become similar gray tones, so pay special attention to charts, highlights and colored instructions. The task changes the color form rather than promising a smaller file or a particular printer's ink saving.
Gray tones can make two different chart colors look alike. Check legends before removing color from a report.
Patterns and labels can help readers tell series apart. This page does not redraw the chart for you. A black-and-white print test is useful when the final copy will be printed that way.
Convert a color PDF to grayscale online: steps
Before using PDF to Grayscale, decide what the new copy must contain and where it will be used. Review which charts or labels depend on color before choosing a grayscale copy. Review the upload area and all values required by the current PDF to Grayscale form.
Choose the source
Check each plotted series against the gray legend. For PDF to Grayscale, choose one source from your device. Keep a source copy for another attempt.
Review the form values
The PDF to Grayscale form has no extra task settings. Check the source in the file area.
Run the file task
Use Process PDF to Grayscale after checking the source and form values. Wait for the job to finish. An error means this attempt failed.
Save and check the output
Compare colored legends, light backgrounds, photos and thin lines at the planned viewing size. Store the output on your device. Name this copy separately from the original.
Gray PDF: uses for PDF to Grayscale
PDF to Grayscale can help with reading copies prepared for grayscale displays. It can also be used for color-heavy scans tested for legibility. The PDF result from PDF to Grayscale must suit the intended reading or editing step, so keep the source until that check is complete.
- Reports checked for monochrome printing.
- Reading copies prepared for grayscale displays.
- Color-heavy scans tested for legibility.
- Chart accessibility reviewed with a gray rendering.
Formats and limits for PDF to Grayscale
The PDF to Grayscale form accepts PDF sources. Each PDF to Grayscale upload can be up to 300 MB, which equals 300 MiB. The allowed suffixes on the PDF to Grayscale page do not prove that a source has valid content inside it.
| Accepted formats | Maximum file size | Output |
|---|---|---|
| 300 MB per file (300 MiB upload limit) |
Two different colors can map to similar gray values. Changing does not prove that every graph remains understandable without its original color coding.
How this tool works
PDF to Grayscale uses Ghostscript to handle the source on the server. The PDF to Grayscale request uses your chosen input rather than any local editing project left on your device. Check the PDF contents produced by PDF to Grayscale before treating them as ready for another app or reader.
For PDF to Grayscale, your browser uploads the source to our file-processing server. This is a server task, not local editing.
Files are due for deletion within 1 hour. Cleanup runs during normal service operation. Keep a local download for future use.
PDF to Grayscale questions and answers
If PDF to Grayscale gives an unexpected result, start by checking the source type and the values used in the form. Check the PDF contents from PDF to Grayscale as well as the filename or displayed message. For another result type, compare PDF to Grayscale with the separate tools described in these answers.
What matters when using PDF to Grayscale?
Read pale highlights in a black-and-white proof. View that area at its intended display size. Note any differences that affect your purpose.
Why try Compress PDF?
Compress PDF offers another task beside PDF to Grayscale: reduce PDF file size using Ghostscript. Compress PDF returns PDF. The stated PDF output from PDF to Grayscale matches a listed input type for Compress PDF.
Why try PDF to PNG?
PDF to PNG offers another task beside PDF to Grayscale: convert all PDF pages to PNG images (zipped). PDF to PNG returns ZIP. The stated PDF output from PDF to Grayscale matches a listed input type for PDF to PNG.
Why try Flatten PDF?
Flatten PDF offers another task beside PDF to Grayscale: rewrite a PDF with Ghostscript; inspect forms and annotations afterward. Flatten PDF returns PDF. The stated PDF output from PDF to Grayscale matches a listed input type for Flatten PDF.
What if my PDF result does not open?
For a failed PDF to Grayscale result, first confirm that the download completed and that the viewer supports PDF. Try another local viewer for that format.
Record any error message for support. Keep private source material out of the report.
How do I report a problem with PDF to Grayscale?
Contact support with the PDF to Grayscale page name, source format and the error you saw. Mention any relevant form settings you chose. Do not send passwords or private attachments.