iText is the dominant Java/.NET PDF library with 25 years of history. PDFluent adds what iText lacks: PDF rendering, XFA form support, WebAssembly, and multi-language bindings.
| PDF Parsing | ||
| PDF Rendering (to image/screen)iText has no rendering engine | ||
| Text Extraction | ||
| AcroForms | ||
| XFA Forms — StaticRequires separate pdfXFA add-on | Partial | |
| XFA Forms — Dynamic Reflow | ||
| FormCalc Execution | ||
| PDF/A Validation & Conversion | ||
| PDF/UA Compliance | ||
| Digital Signatures (PAdES) | ||
| OCR | ||
| ZUGFeRD / Factur-X | ||
| PDF Merge / Split | ||
| Redaction | Partial |
| Pure Rust — memory safe by designiText is Java / C# | ||
| WebAssembly (runs in browser) | ||
| Java / JVMiText's primary platform | ||
| .NET | Via C API | |
| Python bindings | ||
| Node.js bindings | ||
| C API | ||
| Mobile SDK (iOS / Android) |
Internal benchmarks — verify with your own workloads.
| Test | PDFluent | iText |
|---|---|---|
| Cold Start | < 10ms | 800–2,000ms |
| PDF/A Validation (100 pages) | 35ms | ~400ms |
| Text Extraction (100 pages) | 120ms | ~900ms |
| XFA Flattening | 85ms | ~1.2s |
| Memory Usage (idle) | 15–30 MB | 200–500 MB |
| PDF Rendering to PNG | 45ms | N/A |
iText cannot render PDFs to images or screen. PDFluent can. This matters for preview thumbnails, document review tools, and any visual workflow.
iText's pdfXFA add-on handles XFA flattening only. PDFluent supports dynamic reflow, FormCalc scripting, and XFA 3.3 form processing.
PDFluent compiles to a ~2MB WASM bundle. You can process PDFs entirely in the browser without a server round-trip. iText is JVM-only.
PDFluent has bindings for Python, Node.js, C, and WASM. iText is Java and .NET only.
Rust starts in under 10ms. JVM startup adds 800ms–2s to every cold invocation — a real cost in serverless environments.
PDFluent pricing is public. iText commercial deals require a sales call.
25 years of Maven artifacts, Spring integrations, Jakarta EE support, and Java-native tooling. If your stack is JVM, iText fits naturally.
For open-source projects that can accept the copyleft obligation, iText 9 is genuinely free. No free-tier limitations on feature set.
iText processes billions of documents per year across banking, government, and legal sectors. The edge cases have been found and fixed.
A broad ecosystem of first- and third-party plugins (pdfHTML, pdfOCR, pdfSweep, etc.) built on a stable extension model.
Backed by Apryse (formerly PDFTron), with dedicated enterprise support contracts and a large sales organization.
Choose PDFluent if you are building in Rust, need WASM/serverless compatibility, or want a commercial license with flat pricing (not per-seat).
iText is a solid choice for Java or C# shops, especially when open source AGPL use is acceptable. It has the broadest documentation and community of any PDF library.
If you're building on the JVM and don't need PDF rendering or XFA, iText is a proven choice — especially if you qualify for the AGPL license. If you need PDF rendering, XFA form processing, browser-side processing, or bindings for Python/Node.js, PDFluent covers what iText can't.
Try PDFluent free for 30 days
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