Here are 2 free websites to convert PDF to grayscale. You can upload PDF file stored on your PC and then all the pages (including images, text, etc.) of that PDF are turned to grayscale. After that, you can save the grayscale PDF to your PC in just one click.
Each PDF to grayscale converter website also has some fantastic and unique features. For example, one website lets you password protect PDF, merge PDF files, convert PDF to grayscale in batch, etc. And another online PDF to grayscale converter comes with the features to convert text/image or both of PDF file to grayscale, upload PDF from Google Drive or Dropbox, and more.
So, let’s check these online PDF to grayscale converter websites one by one.
Online2PDF.com is probably the best free website to convert PDF to grayscale in this list. It has some really fantastic features which make it a powerful website. You can convert up to 20 PDF files to grayscale PDFs at a time. This is an amazing feature as you are able to batch convert PDF to grayscale online. Apart from that, you have options to generate a single grayscale PDF from input PDF files, create separate grayscale PDF files from input PDFs, and create separate grayscale PDF files for each page of input PDF files.
Apart from that, it lets you adjust the resolution and quality of PDF images (high, low, medium, standard, etc.). Moreover, you can also add header and footer to PDF, enable copying, printing, and opening protection for output PDF, and change the layout (keep original layout, 2 pages, 4 pages, 6 pages layout, etc.).
Everything is simply good and therefore I can easily recommend this website for PDF to grayscale conversion. There is file size limit of 100 MB for a single PDF to grayscale conversion and 150 MB limit for multiple PDF files but this limit is not an issue in most of the cases.
It also removes all the uploaded PDFs after the conversion process. Also, the output PDF may remain on the server for 60 seconds so that you can save it to PC. So, based on all these features, this website is quite useful.
Sejda.com is a very good website to convert PDF to grayscale online. It has a separate tool for PDF to grayscale conversion. You can add a PDF from PC, Dropbox, or Google Drive account and then get the output PDF with grayscale pages. The unique feature of this website is you can select if you want to convert only images of PDF file to grayscale, only text of PDF file to grayscale, or convert both text and images of PDF file to grayscale. After that, you can generate the output and save the output grayscale PDF. The PDF file can be downloaded to PC, Google Drive, and Dropbox accounts.
Your PDF file(s) remain private and are deleted automatically after 5 hours from its servers. All such features make it a very useful PDF to grayscale converter website. However, the free plan (without sign up) has some limitations. You can upload a PDF file containing maximum 200 pages or 50 MB size, which is sufficient I guess. Apart from that, you can convert one PDF at a time and 3 tasks can be accomplished in an hour. If this limit doesn’t bother you, then this PDF to grayscale website is simply a good choice.
You can also use other features of this website like encrypt PDF, split PDF by bookmarks, rotate PDF, etc.
Here is the full review of this website.
These are two best free options available to convert PDF to grayscale online. Both are simply good but I like the first website on this list. It is so because it comes with batch PDF to grayscale conversion, lets you add password protection to PDF, and file size limit is also greater than the second website. If you know some other free online PDF to grayscale converter, feel free to share it with me using the Comments section and I will add that website to this list.