Alter Signature Certificate For Free

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Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
Based on 12500+ reviews
Last updated on Dec 27, 2025

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Great, I own several businesses and am Senior Vice President at Colliers International (13,000 employees). I would like to speak with a business specialist next week to explore opportunities.
Neil G
As a small business owner in the healthcare field, we do not have the resources to have much administrative support. PDFfiller's user interface helps us with the host of insurance forms that are emailed to us. We simply download them in to PDFiller and our forms look professional and they are easily accessible to save or send back completed and signed.
Walt
customer service excellent. removed one star for irritating Watermark and Filler buttons right next to the page scroll bar … way too easy to accidently add them … hence the need to contact support
jennifer
the experience was mostly good, however, when coming from a google doc and putting the document here to convert into a pdf, the drop down tabs that were originally in the google doc did not work- in that way, it was tedious.
Anonymous Customer
pdfFiller for document sign I like the robust feature that pdfFiller provides, fairly simple to use Limited functionality, rarely see updates to match other features Adobe has
Verified Reviewer
Used the product a few times (PDF editor) and really liked it but disn't use it enough to warrant purchase. I forgot to cancel the free trial and was charged the annual fee a few weeks later. The company immediately refunded me when I requested it, and did so without question or issue.
Louise P
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