ComPDF

ComPDF

PDF Technologies, Inc.
pdfRest

pdfRest

Datalogics Inc.
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About

ComPDF, powered by KDAN (TPEx: 7737), is built on the vision of “Leading the Intelligent PDF Era with Continuous Innovation”. ComPDF offers following products: - ComPDF SDK is highly compatible with web, server, desktop, and mobile platforms, seamlessly integrating with various development frameworks. It provides features lincluding generation, viewing, editing, conversion, signing, etc. - ComPDF Cloud delivers a secure, stable, and efficient service environment, simplifying enterprise document processing and business integration workflows. With the flexibility to use either Open API calls or private deployment, enterprises can generate, edit, convert, OCR recognize, and extract data. - ComPDF AI provides intelligent document processing capabilities, enabling automated data extraction, parsing, and knowledge management. Together, these components streamline workflows, improve operational efficiency, and accelerate enterprise digital transformation.

About

pdfRest API Toolkit was made by developers, for developers. Rapidly integrate PDF workflows with any business application, simply and seamlessly. pdfRest API Toolkit includes all of the PDF processing tools you'll need, to make your job easy. PDF to Word, Excel, PowerPoint, Image, Add to PDF, Query PDF, Extract Text, Convert to PDF, Convert to PDF/A, PDF/X, Compress PDF, Linearize PDF, Flatten Forms, Transparencies, Annotations, Layers, Merge /Split PDF, Encrypt/Decrypt PDF, Restrict PDF, Watermark PDF, Sign PDF, Redact PDF, Import/Export Form Data, Rasterize PDF, PDF to Markdown, XFA to Acroforms, Set Page Box, Create Blank PDF, Delete PDF, Convert PDF Colors, OCR PDF, API Polling, Upload Files, Zip Files. Get up and running fast with the pdfRest Postman Collection or start from functional sample code in NodeJS, .NET, JavaScript, Python, PHP, and cURL from the pdfRest GitHub repository. Gold-standard processing powered by Adobe® PDF Library™ ensures the highest quality results.

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

Developers looking to add PDF functionality to their or their company’s projects.

Audience

Developers looking to rapidly integrate high-quality PDF workflows with any business applications

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

Contact us for pricing
Free Version
Free Trial

Pricing

$0 per month
Start with a free trial Guest API Key, no signup required. Then sign up to scale your usage with one of 4 Pricing Plans, including a Free tier.
Free Version
Free Trial

Reviews/Ratings

Overall 4.8 / 5
ease 4.5 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5

Reviews/Ratings

Overall 4.9 / 5
ease 4.8 / 5
features 4.7 / 5
design 4.5 / 5
support 4.7 / 5

Pros & Cons from Real Users

Pros

  • ComPDF's conversion API has become integral to our document management platform. We process a high volume of incoming documents in various formats—Word, Excel, HTML—and need reliable, high-fidelity PDF conversion to deliver a consistent user experience. The batch processing API handles our peak loads with ease, and conversion quality far surpasses the open-source alternatives we benchmarked. What truly stands out is the API documentation: detailed, well-organised, and accompanied by practical code examples that significantly accelerated our integration. Response times are fast even under heavy load, and the error-handling callbacks made our pipeline more resilient.
  • We integrated ComPDF's PDF SDK—specifically the viewing, editing, annotation, and annotation reply features—to provide core functionality for our online learning platform. What stands out most is how seamlessly these features enable interactive collaboration between instructors and students. The annotation and reply capabilities function smoothly, allowing real-time feedback on assignments and course materials within a familiar PDF interface. The rendering quality is excellent, and the editing tools are intuitive, which has significantly enhanced user engagement across our learning programs.
  • As a user who has integrated the ComPDF SDK into our company's internal system, I appreciate how smoothly it fits into our existing infrastructure. The SDK is well-architected, making the integration process straightforward even for our internal engineering team. Once deployed, it has handled our document processing workloads—including batch conversions, PDF generation, and data extraction—with impressive stability. The consistency of output quality means we can trust it as a core component of our internal toolchain without constant monitoring or manual intervention.
  • The flexibility of the on-premise SDK has been a game-changer for us. Due to our strict data compliance policies, we cannot send sensitive documents to the cloud. ComPDF's SDK allowed us to deploy the entire processing engine behind our own firewall without losing any functionality. The backend batch processing—such as OCR, redaction, and format conversion—is stable, efficient, and maintains excellent fidelity even with complex document layouts.
  • The API documentation is incredibly thorough, which made integration smooth and fast. We connected our core systems to ComPDF's conversion engine in just a few hours. On the backend, batch processing of PDFs—including conversions, merges, and data extraction—has been rock stable. Even during peak loads, the response times remain consistent, and the error rate is near zero.

Cons

  • Advanced options for controlling specific conversion nuances—such as handling uncommon fonts or complex Excel chart rendering—required some trial and error. A dedicated "advanced configuration" section in the documentation would help teams tackle these edge cases more efficiently.
  • The SDK offers extensive functionality, but managing the interaction between multiple features—such as synchronizing annotations across different user sessions—required additional development effort. While the individual components work well, clearer documentation on handling real-time collaboration scenarios would have helped streamline the implementation. Some advanced UI customization options also took time to discover and configure properly.
  • The SDK comes with extensive functionality, but the documentation could be more structured for internal integration scenarios. We occasionally had to dig through different sections to understand how certain modules interact when building a custom backend pipeline. More comprehensive integration examples or architecture guides would help streamline the setup process for teams building internal systems.
  • The initial resource planning for deployment required several consultations with the support team to get the hardware configuration right. A more automated deployment guide or a scaling calculator would be a helpful addition for future updates.
  • While the documentation is strong, having more detailed business use-case examples (beyond basic technical implementations) would help accelerate the initial setup for teams with less API experience.

Pros & Cons from Real Users

Pros

  • The team at PDFrest is incredibly helpful — they respond quickly, clearly, and even took individual feature requests into account without delay. The API itself is fast, user-friendly, and well-documented. A solid, reliable partner to work with.
  • pdfRest is surely a business oriented PDF converter because it can convert all sorts of files, small and large, landscape or portrait, into splendid and crisp PDFs for all purposes.
  • It is the best documentation tool in the market for creating, editing and converting office suite documents into PDF. Really liked its simple to use procedures.
  • With pdfRest I am assured that all my word, excel and presentation files can be easily converted to PDF without migrating to other softwares. Really a reliable software with comprehensive features.
  • It is an excellent PDF conversion tool that offers a wide range of features and functionality. The platform provides a user-friendly interface that makes it easy to convert PDF files to various formats such as Word, Excel, and HTML. Additionally, PDFRest offers a robust API that allows users to seamlessly integrate PDF functionalities into their applications. One of the standout features of PDFRest is its conversion speed. The platform can convert large PDF files quickly and accurately, saving users valuable time and effort. Moreover, PDFRest's API is versatile and flexible, providing users with the ability to customize and automate their PDF workflows easily.

Cons

  • The team at PDFrest is incredibly helpful — they respond quickly, clearly, and even took individual feature requests into account without delay. The API itself is fast, user-friendly, and well-documented. A solid, reliable partner to work with.
  • Multiple file upload options is missing or I didn't find the option, either ways would appreciate some guidance.
  • I do not have complaints at the moment with regards to execution of the tool or its processes.
  • OCR feature could have been a lovely add. I hope the makers add this feature soon.
  • One area where the platform falls short is in its limited language support. PDFRest currently only supports English, which can be a significant limitation for users.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

PDF Technologies, Inc.
Founded: 2014
Singapore
www.compdf.com

Company Information

Datalogics Inc.
Founded: 1967
United States
pdfrest.com

Alternatives

Pdftools

Pdftools

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Alternatives

KDAN PDF

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Investintech PDF Library SDK

Investintech PDF Library SDK

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Adobe PDF Library SDK

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JPedal

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KDAN PDF

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PDFKit.NET 5.0

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TallComponents
Pdftools

Pdftools

PDF Tools

Categories

Categories

PDF Features

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

Integrations

GitHub
JavaScript
Node.js
PDF Reader Pro
PHP
Postman
Python
pdfAssistant.ai

Integrations

GitHub
JavaScript
Node.js
PDF Reader Pro
PHP
Postman
Python
pdfAssistant.ai
Claim ComPDF and update features and information
Claim ComPDF and update features and information
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