If you occasionally need to do more serious PDF editing, but don't want to commit to paying for Acrobat Pro, Sejda PDF may be a solid option for you. That's because the free version isn't feature-limited, but quantity-limited. Every day, it will let you perform up to 3 major actions on files of up to 200 pages and 50MB.

Editing text in PDF documents can be tricky when the original has not been saved in text format. In those instances you're dealing with images of text. But with Sejda, every time you click on a line, the app will replace it with text based on its recognition algorithm.

Merge files into one PDF

Visually combine and reorder pages, merge multiple PDF files. Alternate and mix odd and even page from separate files.

Split PDF files

Split documents by pages. Extract separate documents. Split by size, bookmarks or text occurrences. Divide two page layout scans

Convert PDF files to Office and image formats

Convert PDF files to Word, Excel and to image. Convert images to PDF file

Compress PDF

Reduce the size of PDF files. Optimize images and other resources

Edit PDF files

Add, edit or move text in your PDF. Change the font type, size and style. Insert, reorder, move or delete pages.
Add signature, highlight text and shapes

Apply PDF passwords and restrictions

Add copy and edit protection to a PDF. Include a password to protect your PDF from unapproved access

Watermark PDF

Add image or text watermark to PDF documents

Grayscale PDF

Make a PDF text and images grayscale

Crop PDF

Trim PDF margins, adjust visible page area, change PDF page size