Editing a PDF used to mean paying for Acrobat. CrispPDF offers a focused set of free editors that handle the 90% of edits real people actually need: a signature here, a watermark there, page numbers, OCR for scans.
Trim margins
Fix corruption
Black & white
Sign documents
Image watermark
Make searchable
Number pages
Text watermark
Save images
Dark-mode PDF
Title, author, etc.
Text diff