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PSPDFKit VS PDFluent SDK

Compare PSPDFKit VS PDFluent SDK and see what are their differences

KeptPDF
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Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

PSPDFKit logo PSPDFKit

PSPDFKit is the best framework for working with PDF files. Our SDK provides first-rate PDF solutions for your application with features like annotating, signing, and form filling. We power successful projects for businesses across the globe.

PDFluent SDK logo PDFluent SDK

Pure Rust PDF SDK โ€“ zero C deps, 2.5MB brotli WASM, tested on 50k PDFs.
  • PSPDFKit Landing page
    Landing page //
    2023-02-12
  • PDFluent SDK Landing page
    Landing page //
    2026-08-28

PDFluent is a PDF SDK built on a pure Rust core (48 crates, zero C or C++ dependencies). This means no native library to link and a single dependency to vendor. The Rust core is reached from Python, .NET, Java and Node.js through native bindings, and is compiled to WebAssembly for the browser (2.5 MB brotli-compressed over the wire).

You can integrate PDFluent from Rust, Python, .NET, Java, and Node.js, with packages published on crates.io, PyPI, NuGet, Maven Central, and npm. The SDK covers the full spectrum of PDF operations:

  • Rendering, text and image extraction
  • AcroForm forms and PAdES digital signatures
  • PDF/A conversion and validation, redaction, OCR
  • Document manipulation: merge, split, watermark, compress
  • XFA form rendering and flattening (experimental)

PDFluent has been tested on 50,000 real PDFs with zero crashes. In a rendering fidelity benchmark of 5,000 PDFs, 94% achieved SSIM 0.95 or better against the reference renderer mutool.

Run the SDK with no licence key at all and you get every feature plus a Producer watermark on output. Take the 30-day evaluation, no credit card required, and the watermark is gone for those 30 days. Buy a perpetual licence (paid once from EUR 699 โ€“ no subscription) and it stays gone.

A companion desktop editor for macOS and Windows is free for everyone, including commercial use. It runs entirely on the device, requires no account, and sends no telemetry. The company behind PDFluent is Innovation Trigger B.V., based in the Netherlands.

PSPDFKit

Website
pspdfkit.com
Pricing URL
Official PSPDFKit Pricing
$ Details
-
Platforms
-
Edit details

PDFluent SDK

Website
pdfluent.com
Pricing URL
Official PDFluent SDK Pricing
$ Details
freemium โ‚ฌ699 / One-off (Start free for 30 days โ€” full SDK, no watermarks)
Platforms
Linux MacOS Windows Web Browser Online
Startup details
Country
Netherlands
Employees
1 - 9
Edit details

PSPDFKit features and specs

  • Comprehensive PDF Toolkit
    PSPDFKit provides a wide range of PDF functionalities including viewing, annotating, signing, and form filling, which makes it a one-stop solution for PDF handling within applications.
  • Cross-Platform Support
    PSPDFKit offers support for multiple platforms including iOS, Android, Windows, Web, and macOS, allowing developers to maintain consistency in PDF operations across different environments.
  • Ease of Integration
    With detailed documentation and various SDKs, integrating PSPDFKit into existing applications is relatively straightforward, saving development time and resources.
  • High Performance
    PSPDFKit is optimized for performance, capable of handling large PDF files with efficiency and speed, ensuring a smooth user experience.
  • Customization and Extensibility
    The toolkit offers extensive customization options and the ability to extend functionalities, enabling developers to tailor the PDF features to suit specific use cases.

Possible disadvantages of PSPDFKit

  • Cost
    PSPDFKit is a commercial product with licensing fees, which can be expensive for some organizations, especially smaller ones or those with limited budgets.
  • Complexity for Simple Applications
    For projects that require only basic PDF functionalities, the extensive features of PSPDFKit might be overkill, adding unnecessary complexity.
  • Dependence on Vendor
    Using a third-party library like PSPDFKit introduces a dependency on the vendor, which can be a risk if the vendor changes pricing models or discontinues support.
  • Learning Curve
    While there is comprehensive documentation, the breadth of features means that there can be a learning curve for developers new to PSPDFKit, which could delay implementation.

PDFluent SDK features and specs

  • Engine
    Pure Rust core, 48 crates, no C or C++ dependencies
  • Language surfaces
    Rust, Python, .NET, Java, Node.js, WebAssembly
  • Distribution
    crates.io, PyPI, npm, NuGet, Maven Central
  • WebAssembly build
    2.5MB brotli-compressed, runs in the browser
  • Licence
    Perpetual, paid once from EUR 699, no subscription
  • Evaluation
    30 days, no credit card required
  • Unlicensed output marking
    Adds Producer watermark to output, all features enabled
  • Stability test
    Zero crashes on 50,000 real PDFs
  • Rendering quality
    94% of 5,000 PDFs at SSIM 0.95+ vs mutool
  • Document operations
    Rendering, text and image extraction, forms, redaction, OCR, merge, split, watermark, compress
  • Standards & compliance
    PAdES digital signatures, PDF/A conversion and validation
  • XFA support
    Renders and flattens legacy XFA forms, experimental
  • Desktop editor
    Free for macOS and Windows, commercial use, runs entirely on device

PSPDFKit videos

+ Add

5 min Presentations *** Sponsored by PSPDFKit

More videos:

  • Review - PSPDFKit
  • Review - All about eSignatures & Digital Signatures in PDF | Jonathan Rhyne | PSPDFKit

PDFluent SDK videos

No PDFluent SDK videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to PSPDFKit and PDFluent SDK)

PSPDFKit

PDFluent SDK

PDF Tools
89 89%
PDF Tools
11% 11
HTML To PDF
0 0%
HTML To PDF
100% 100
PDF Creator
100 100%
PDF Creator
0% 0
PDF Conversion API
80 80%
PDF Conversion API
20% 20

Questions & Answers

As answered by people managing PSPDFKit and PDFluent SDK.

How would you describe the primary audience of your product?

PDFluent SDK's answer:

This fits developers who need to process real-world PDFs that include XFA forms - often from government or banking sources - and want a single SDK that works consistently across Python, Node.js, Java, C, Rust, and WebAssembly without managing native binaries for each platform.

What makes your product unique?

PDFluent SDK's answer:

PDFluent SDK parses XFA, a 1,000-page specification that almost every modern PDF library ignores. It evaluates FormCalc scripts and flattens XFA forms to standard PDF, validated against an internal corpus of 1,150 enterprise documents including US, Canadian, IRS, GSA, and VA government forms plus banking documents. XFA support is experimental and has no published fidelity claim.

Why should a person choose your product over its competitors?

PDFluent SDK's answer:

Because the SDK is pure Rust with no C or C++ dependencies, there is no FFI boundary inside the engine, no C++ exceptions to catch, and no platform binary to ship per OS. This eliminates the deployment complexity of dragging in a full PDFium build.

What's the story behind your product?

PDFluent SDK's answer:

The team got tired of PDF libraries that crashed on real-world documents, ignored XFA entirely, or shipped 80 MB of C++ just to read a form field. They started building a parser in Rust from scratch, then added an XFA engine, a renderer, and a PDF/A converter. The company is Innovation Trigger B.V., based in the Netherlands.

Which are the primary technologies used for building your product?

PDFluent SDK's answer:

PDFluent is built in pure Rust with no C or C++ dependencies. It provides bindings via PyO3 for Python, napi-rs for Node.js, JNI for Java, a cdylib header for C, native Rust, and WebAssembly (2.5 MB brotli-compressed). The same engine runs across all surfaces.

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare PSPDFKit and PDFluent SDK

PSPDFKit Reviews

2024 Best C#/ .NET PDF Library for Developers
PSPDFKit's GdPicture.NET Library is a cross-platform SDK, encompassing OCR, data extraction, editing, PDF conversion, barcode generation, scanning, and more. With its rich API, developers quickly add PDF, imaging, and intelligent data processing capabilities to any .NET application. No matter which development environment, you can leverage GdPicture.NET SDK to create...
Source: www.compdf.com
2024 Best JavaScript PDF Viewer
This article introduces the five best JavaScript PDF viewers to meet your needs. We cover popular open-source options like PDF.js and React PDF, as well as three commercial choices: ComPDFKit for Web, PSPDFKit for Web, and PDFTron WebViewer. We're here to help you pick the right one for your case!
Source: www.compdf.com
PDF Reports: The Ultimate Guide
PSPDFKit provides support for generating, editing, and collaborating on commercial-grade PDFs. It has very strong performance and provides deep support with a diverse range of features. However, it comes at a premium price point, and some features may require additional licensing.
Source: unidoc.io
5 Best PDF Conversion SDK Manufactures
Converting PDF into MS Office formats is recognized as notoriously challenging within the document technology industry, few have overcome it, but at least they are on their way. The PSPDFKit PDF conversion API supports Office to PDF, Image to PDF, and HTML to PDF.
Source: www.compdf.com

PDFluent SDK Reviews

We have no reviews of PDFluent SDK yet.
Be the first one to post

Social recommendations and mentions

Based on our record, PSPDFKit seems to be more popular. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

PSPDFKit mentions (3)

  • How to generate PDFs in react?
    For a commercial solution check out https://pspdfkit.com/. Full disclosure, I am a Solutions Engineer for the company. Iโ€™m happy to answer any questions you have. Source: over 3 years ago
  • Representing and formatting PDF files in iOS app (SwiftUI)
    Never touched it but thereโ€™s something called PSPDFKit. Source: over 3 years ago
  • What's the best PDF reader for Mac?
    The team at PSPDFKit, who make this app, is one of the most knowledgeable teams when it comes to PDF content that I've ever interacted with. Source: almost 5 years ago

PDFluent SDK mentions (0)

We have not tracked any mentions of PDFluent SDK yet. Tracking of PDFluent SDK recommendations started around Aug 2026.

What are some alternatives?

When comparing PSPDFKit and PDFluent SDK, you can also consider the following products

ComPDF - Offer a top-quality PDF SDK, PDF API, and PDF AI solution for companies and developers. It enables you to integrate PDF document generation, viewing, annotation, editor, conversion, form filling, signing, parsing, and more into your applications.

Apryse - Integrate document processing capabilities into any software applications. Generate, convert, view, edit, and sign pdf and documents easily.

PDFTron - PDF components and tools.

Adobe - Creativity doesnโ€™t just open doors.

Foxit PDF SDK - Foxit is the leading PDF SDK distributor for Desktop, Mobile & Web applications. We provide the best UX on all major platforms, including iOS, Android and Windows, with our PDF libraries

Firefox PDF Viewer (PDF.js) - PDF Viewer (aka pdf.js) is a new revolutionary extension using web standard technologies that...

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