PDF9.Ai

PDF9.Ai

9 Rank LLC
+
+

Related Products

  • MobiPDF
    7,544 Ratings
    Visit Website
  • Foxit Document Workflow APIs
    8 Ratings
    Visit Website
  • RAD PDF
    3 Ratings
    Visit Website
  • Adobe Experience Manager
    1,876 Ratings
    Visit Website
  • StackAI
    53 Ratings
    Visit Website
  • Apryse PDF SDK
    158 Ratings
    Visit Website
  • Titan
    376 Ratings
    Visit Website
  • Retool
    593 Ratings
    Visit Website
  • Nutrient SDK
    111 Ratings
    Visit Website
  • UnForm
    19 Ratings
    Visit Website

About

PDF9.Ai is a free, AI-powered PDF workspace that brings 68 tools into a single browser-based platform. It includes a PDF reader, full-featured editor, conversion suite, e-signature tools, and enterprise governance controls. Most operations run entirely in-browser, so files never leave the user's device. Nine built-in AI models enable document chat, summarization, and translation into 50+ languages at no extra cost. Key capabilities include merging, splitting, compressing, and organizing PDFs; converting to and from Word, Excel, PowerPoint, HTML, CAD, and image formats; OCR; PAdES/PKCS#7 digital signatures with audit trails; smart PII redaction; form filling for U.S. government forms; and document comparison. PDF9.Ai serves students, freelancers, legal professionals, accountants, HR teams, and enterprises. Teams benefit from SSO, RBAC, audit logs, and compliance-aligned infrastructure. Desktop apps are available for Windows and macOS.

About

Made in Switzerland, the land of watches, banks, and clean design, Smallpdf is an award-winning company that offers a suite of clever document management tools for everyone—for work, for home, for life. Founded in 2013, Smallpdf provides a simple, secure, and reliable answer to heavy, awkward PDF software. By removing unnecessary features and adding a deep focus on user experience, Smallpdf has become the most-loved and most-trusted PDF software on the planet, serving over 500 million users, 100,000 different companies, in 24 different languages, and in every country in the world—even Antarctica! Smallpdf integrates seamlessly with professional and personal tasks, boosting productivity and simplifying the way people manage their documents, with tools to compress, convert, edit, sign, protect, and unlock PDF documents in just a few easy steps.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

All Businesses, Government, Education, Individuals

Audience

Everyone

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

$12 per month
PDF9 AI offers a free version with access to core PDF tools. Paid plans are available for additional features.
Free Version
Free Trial

Pricing

$7/month/user
$84/year or $10/month.
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 5.0 / 5
ease 4.7 / 5
features 4.3 / 5
design 4.3 / 5
support 4.7 / 5

Pros & Cons from Real Users

Pros

  • Absolutely love that SmallPDF is available through a web browser, meaning we do not need to download and install any software and that it is accessible anywhere we are regardless of which computer we are using. It has *most* the features we use for editing PDFs including inserting text and converting PDF files to Word, and it integrates nicely with Google Suite. The overall design and UX is also very slick and intuitive.
  • The convenience of being able to convert to and from PDFs, along with a range of file manipulation options whenever I want, makes Smallpdf a no-brainer compared to the the huge expense and bloated nature of the market leader. It does exactly what I need it to do, 95% of the time, the balance is usually page "overflow" and not hard to rectify.
  • How easy it is to use, and the price. Also, the style is beautiful. And you can compress the document right after editing and signing it.

Cons

  • Coming from someone who also uses Nitro Pro, SmallPDF is missing the feature to directly edit existing text and images on a PDF file while retaining original formatting. This means I have to occasionally revert back to Nitro Pro if I need to edit existing text and images on PDF files (as opposed to adding text or images to PDF files, which is what SmallPDF can do).
  • The service could do with a custom option - there are tools I use all the time but there is no option to have shortcuts to these particular tools on the main menu. As a subscriber it would make sense to have that option rather than having to go through the whole list of tools to select the same thing each time. Conversion from pdf to jpg is not high resolution so the images do not stand up well on a web site. The Word to PDF conversion does not like "tight" pages and will overflow a two-page Word file into 3 pages of PDF, which can be frustrating but if you are aware of the problem then you can adjust the volume of copy accordingly to compensate.
  • I would like to have more featured with editing my documents.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

9 Rank LLC
Founded: 2025
United States
pdf9.ai/

Company Information

Smallpdf
Founded: 2013
Switzerland
smallpdf.com

Alternatives

Alternatives

MobiPDF

MobiPDF

MobiSystems
PDFCreator

PDFCreator

pdfforge
PDF Studio

PDF Studio

Apryse
Instafill

Instafill

Botmakers LLC
SODA PDF

SODA PDF

Avanquest
Foxit PDF Editor

Foxit PDF Editor

Foxit Software

Categories

Categories

Digital Signature Features

Audit Trail
Authentication
Auto Reminders
Customizable Templates
Document Analytics
Mobile Signature
Multi-Party Signing
Progress Tracking
Task Progress Tracking

Document Management Features

Access Controls
Archiving & Retention
Collaboration Tools
Compliance Tracking
Document Archiving
Document Assembly
Document Capture
Document Conversion
Document Delivery
Document Indexing
Document Retention
Electronic Signature
Email Management
File Recovery
File Type Conversion
Forms Management
Full Text Search
Offline Access
Optical Character Recognition
Print Management
Version Control

PDF Features

Annotations
Convert to PDF
Digital Signature
Encryption
Merge / Append
PDF Reader
Watermarking

PDF Editors Features

Access Controls / Permissions
Annotations
Commenting / Notes
Compare Side-by-Side
Customizable Branding
Delete Pages
Electronic Signature
Forms Management
Full Text Search
Merge / Append
Offline Access
Optical Character Recognition (OCR)
Rearrange Pages
Rotate Pages
Watermarking

Integrations

Claude
Desktop.com
Dropbox
Gemini
Google Cloud AI Infrastructure
Google Drive
OpenAI
Stripe
Wasabi

Integrations

Claude
Desktop.com
Dropbox
Gemini
Google Cloud AI Infrastructure
Google Drive
OpenAI
Stripe
Wasabi
Claim PDF9.Ai and update features and information
Claim PDF9.Ai and update features and information
Claim Smallpdf and update features and information
Claim Smallpdf and update features and information