List of the Top 19 Free PDF APIs in 2026

Foxit provides a powerful portfolio of cloud-native APIs built to help organizations streamline, secure, and scale document-centric workflows. Leveraging flexible REST-based architecture, Foxit APIs enable developers to integrate document creation, conversion, extraction, signing, and viewing capabilities directly into their applications—driving greater efficiency and reducing operational complexity. The Foxit PDF Services API supports high-volume PDF processing tasks such as conversion, extraction, optimization, and redaction. The Document Generation API automates the creation of customized PDFs and DOCX files using dynamic templates and real-time data sources. The Foxit eSign API embeds compliant, legally binding eSignature workflows with advanced audit and tracking features. The PDF Embed API enables fully customizable in-app PDF viewing with support for annotations, forms, and secure access controls. Together, Foxit APIs deliver a secure, scalable foundation for end-to-end document automation and digital workflow transformation.

The pdfRest API Toolkit was crafted by developers for developers, enabling swift integration of PDF workflows into business applications with ease and efficiency. This toolkit encompasses a comprehensive suite of PDF processing tools created by digital document specialists who possess decades of expertise to simplify your tasks: it offers conversions such as PDF to Word, PDF to Excel, and PDF to PowerPoint, along with functionalities like adding to PDFs, text extraction, querying PDFs, converting to various formats, and compressing PDFs. Additionally, it provides features for flattening forms, transparencies, annotations, and layers, as well as merging, splitting, encrypting, decrypting, and watermarking PDFs, along with form data management, OCR capabilities, and file uploads and zipping. Users will find extensive documentation featuring intuitive endpoints and parameters, along with sample code in .NET, JavaScript, Python, PHP, and cURL for every endpoint to facilitate smooth operation. Powered by the renowned Adobe® PDF Library™, it allows users to begin without any financial commitment and offers competitive pricing suitable for projects of any scale. The design of pdfRest emphasizes flexibility, allowing APIs to be accessed from any programming language capable of making API requests, making it a versatile choice for developers aiming to simplify their PDF workflow. Start your journey with your first API call today and experience the ease of PDF management firsthand.

Our web application and API facilitate the effortless creation of PDF documents, including invoices and letters. To get started, prepare your Word template by inserting tags at the locations where you wish to include dynamic content. You can then submit your data in either JSON format or an Excel file. The system will produce a document for every data entry, substituting the tags in the template with the corresponding real data. With robust customization options, businesses can easily generate PDF documents tailored to various needs. After uploading your template, the merge tags are automatically recognized based on its content. Our REST API is designed to help you craft personalized solutions for your organization. You can efficiently generate large volumes of PDF documents, such as contracts and letters, in a single go. Simply use the Generate Document API with your data, and a PDF will be created from the chosen template in a matter of seconds, streamlining your document generation process significantly. Whether you need one document or thousands, our system is equipped to handle your requirements swiftly and accurately.

Pdftools offers robust solutions for handling vast numbers of documents, potentially reaching into the millions. Tailored for sectors that heavily rely on documentation, the Pdftools suite of SDKs aims to enhance the speed, simplicity, and overall ease of your document workflows, reducing stress along the way. Built on reliable SDKs and APIs, Pdftools products integrate effortlessly into your current systems and applications. With the capacity to process thousands of documents each minute, our tools prioritize speed and efficiency. As engineers committed to excellence, we ensure that only the most trustworthy, usable, and well-documented platforms are utilized. While file sizes can be minimized, we guarantee that quality and interactivity remain intact. Additionally, our solutions help ensure that your documents adhere to long-term archiving standards. Comprehensive documentation accompanies every aspect of our products, allowing for a seamless onboarding experience. With Pdftools, you can transform your document management approach and unlock new efficiencies.

ComPDF is a brand under PDF Technologies (a KDAN company), offering a range of products including ComPDFKit (PDF SDK and Conversion SDK) and ComIDP (an Intelligent Document Processing solution). Developers and businesses can integrate ComPDF products via SDKs, APIs, or low-code platforms to enable powerful PDF functionalities such as rendering, editing, annotation, conversion, form filling, digital signing, document comparison, measurement, redaction, OCR, and data extraction. 1. Product Details of ComPDF: - ComPDFKit PDF SDK Our PDF SDK renders PDFs at the fastest speed and provides rich and reliable functionalities including viewing, markup, content & page editing, digital & electronic signing, form filling, OCR, comparing, measuring, etc., satisfying the needs of processing PDFs in different scenarios. - ComPDFKit Conversion SDK Support Convert PDF to or from Word, Excel, PPT, TXT, RTF, PNG, JPG, HTML, JSON, markdown, searchable PDF, etc. - ComIDP ComIDP is the intelligent document processing, allow companies to integrate for unstructured data extracting, knowledge base building, AI Q&A, image pre-processing, PDF parsing, PDF data extraction, PDF table extraction, etc. 2. Tailored Solutions for Unique Business Demands No matter in construction, education, or any other industry, our specialized solutions streamline your workflows. Whether integrating PDF features into apps or collaborating on PDF editing with teams, we have the ideal solutions tailored for you. - Low-code PDF solution on Make.com, zapier, etc. - Construction - Aviation - Manufacturing - Finance - Education - Printing - Healthcare - Government - Salesforce - Sharepoint - Onedrive - Teams ……

KDAN PDF is a versatile and intelligent PDF solution designed to optimize the digital workflows of independent professionals and specialized industries. In a world where document management is central to success, KDAN PDF provides the tools necessary to edit, secure, and analyze files with precision across Windows, Mac, and mobile devices. The platform stands out by integrating document intelligence that allows professionals to interact with their PDF content. Through the AI assistant, users can generate summaries of lengthy reports, ask specific questions about file data, and extract tables directly into editable spreadsheets. This intelligent approach minimizes administrative overhead and allows users to focus on high-value tasks. Key features of KDAN PDF include: - Professional Editing and OCR: Seamlessly update text and images or use multi-language OCR to digitize paper archives. - Synchronized Workflow: Maintain continuity across iOS, Android, and desktop environments with a unified user interface. - Advanced Security: Protect sensitive information with permanent redaction, encryption, and digital signatures. - Flexible Organization: Manage documents efficiently using Bates numbering, page rearrangement, and high-fidelity file conversion. Optimized for fields like healthcare, legal services, and academia, KDAN PDF ensures that your professional documentation is handled with the highest level of integrity and efficiency. By providing an offline-first experience, it guarantees that your most sensitive data remains secure while you work across any screen.

Transforming a webpage into a PDF is now simpler than ever with PageToPDF @ Aypeye. Our cloud-based PDF converter offers a quick and efficient way to generate high-quality PDF files from any website, all at no cost to users online. Moreover, PageToPDF features an API designed for bulk conversions, making it an excellent choice for users who need to convert several webpages simultaneously. Simply provide the URL of the page you wish to convert, and our cutting-edge software will create a polished PDF document in no time. This PDF generator caters not only to professionals aiming to archive key online content for future reference or to share with clients but also to students who require saving articles for their research or studies. One of the most appealing aspects of PageToPDF is its flexible pricing structure; there are no recurring fees or contracts involved. Instead, we operate on a Pay As You Go basis, allowing you to pay solely for the services you utilize, making it both convenient and economical. In today's fast-paced digital environment, having such a tool at your disposal is invaluable.

Anvil is a versatile workflow platform based on embedded logic that enables businesses to efficiently manage a large volume of PDFs, which require completion, generation, maintenance, and signing. This platform allows for a tailored approach to handle diverse PDF-related tasks seamlessly.

PDFMonkey offers a powerful solution for all your PDF generation needs. Utilizing modern web technologies alongside a user-friendly REST API, crafting beautiful documents is easier than ever before. Don’t waste precious time! Streamline your development process since there's no requirement to write lengthy code for generating PDFs, tackle complex setups, or wade through dependency challenges. We handle all the complexities for you, enabling you to concentrate on what really counts. Experience the simplicity of document creation with PDFMonkey now and transform the way you generate PDFs!

Explore an all-encompassing toolkit that is specifically crafted to guarantee the success of your projects: it boasts a variety of features such as image resizing and CDN services, as well as tools for PDF and screenshot generation, currency exchange, discount management, email validation, and QR code creation, to name just a few! Our cutting-edge color generator allows you to easily produce unique shades from textual input, effortlessly switch between HEX, RGB, and HSL color formats, and develop color palettes that are inspired by a chosen color or text prompt. Image manipulation is simplified with this API, enabling you to customize and deliver images seamlessly via a Content Delivery Network. You can also easily compute readability scores, approximate reading durations, and evaluate the sentiment of any text you provide. Create perfect QR codes in both image and vector formats that can be customized to meet your needs, making them ideal for advertising events, presenting discounts, or sharing links. Moreover, you can access detailed insights about a Spotify profile, which includes their name, follower statistics, popularity metrics, profile picture, monthly listeners, biography, social media links, top tracks, and the locations of their most loyal listeners, rendering this toolbox an essential asset for any endeavor. With functionalities tailored for both developers and marketers, this API equips you with all the necessary tools to enhance your projects and effectively connect with your audience in a meaningful way. By integrating these features, you’ll find your workflow transformed, making it easier than ever to achieve your goals.

WebPDF is a versatile online platform that simplifies the process of modifying PDF documents. Through its user-friendly web interface, users can perform various tasks, while a robust API is available for developers looking to integrate these functionalities directly into their applications. The operations you can execute include merging several PDFs, splitting documents, compressing files, extracting metadata, flattening forms, and retrieving images and text from PDFs. Additionally, users can lock or unlock documents, apply optical character recognition (OCR), adjust file sizes and versions, add watermarks, and optimize PDFs for web use. Numerous other tools are also offered, with even more features anticipated in future updates. Best of all, WebPDF allows you to explore these capabilities at no cost, making it accessible even without creating an account. This makes it an excellent choice for anyone needing flexible PDF solutions.

Our application programming interfaces (APIs) simplify the automation of document processing within your software solutions. Each API is capable of handling input documents, whether they are images or PDFs, and provides a well-organized response containing all necessary information. With instant processing, users benefit from an optimal experience. You can expect high-quality outputs regardless of the initial image clarity. This approach yields structured data without the need for any further processing. To assist developers in crafting powerful APIs that are user-ready, we leverage cutting-edge advancements in deep learning. Our innovative algorithms identify pertinent information in images prior to analysis, setting us apart from conventional optical character recognition (OCR) methods. This modern approach dismantles the traditional limitations of OCR in terms of speed, precision, and reliability. There's no need for training, templates, or lengthy setups. Developers can easily integrate our APIs through a plug-and-play system. Our platform is designed with an API-first mentality, catering specifically to developers. Additionally, a free plan is available for developers, requiring no credit card information. These APIs operate in a synchronous cloud environment, ensuring efficient and effective processing. Overall, our solutions aim to revolutionize how document processing is approached in software development.

DynamicDocs API is a robust JSON-to-PDF solution built on LaTeX that enables the generation of bulk PDF documents while seamlessly incorporating elements such as tables, graphs, logic, and charts into the templates. This API empowers users to either design their own templates or leverage pre-existing JSON-to-PDF templates with no need for LaTeX expertise. Furthermore, DynamicDocs API ensures that the resulting PDFs are of exceptional quality, dynamic in nature, and optimized for web use, making it a versatile tool for document creation. Users can enjoy the flexibility of customizing their documents to fit specific needs without the complexity typically associated with PDF generation.

An efficient, reliable, and easy-to-use API designed for converting HTML into PDF format. PDFShift acts as a powerful resource for changing HTML and CSS files into top-notch PDF documents, allowing developers to effortlessly automate their document conversion tasks while minimizing ongoing maintenance costs. With this API, users are guaranteed access to the most current features and upgrades, which significantly boosts productivity in their workflows. Additionally, the straightforward integration process makes it an ideal choice for developers seeking to streamline their operations.

An open-source REST API enables users to generate, modify, and oversee PDF documents through programming techniques. This service offers various functionalities such as the ability to rotate and remove pages, apply password security, compress files, and execute tasks in the background. It stands out as an excellent resource for developers seeking to work with PDFs effortlessly. Access to this API is completely free, requiring only an API token for usage. Additionally, the flexibility it provides can significantly enhance productivity in managing PDF workflows.

PDFBolt is a robust API designed for converting HTML to PDF, making it an ideal solution for businesses and developers seeking to generate high-quality PDF documents effortlessly. This developer-centric API delivers pixel-perfect PDFs that comply with GDPR regulations in mere seconds. Key Features: - Instantaneous conversion of HTML and URLs to PDF format. - Flexible PDF layout customization, including options for headers, footers, margins, and overall page formatting. - Secure processing that adheres to GDPR standards. - Support for both synchronous and asynchronous API requests. - Integration capabilities with webhooks and direct uploads to S3. - A comprehensive dashboard for tracking usage, managing API keys, and reviewing detailed logs. - Extensive documentation alongside responsive customer support. - Free Forever Plan allowing up to 500 PDFs each month. PDFBolt: Streamline your PDF generation without any hassle or complex setup! Enjoy the simplicity of creating PDFs effortlessly!

DynamicPDF API (dpdf.io) is a comprehensive REST API solution that empowers developers to effortlessly integrate sophisticated PDF functionalities into their applications, guaranteeing rapid performance and global accessibility. It offers a wide array of REST endpoints for various tasks, including generating PDFs from images, HTML, Word, Excel, or template data, as well as merging documents, converting formats, filling and flattening forms, adding barcodes and stamps, encrypting files for security, and extracting text, metadata, or XMP data. In addition, DynamicPDF provides an online Designer tool, enabling users to create PDF reports and templates visually, alongside a selection of client libraries in popular programming languages such as Node.js, .NET, Java, PHP, Go, Python, and Ruby, which streamline integration without requiring direct HTTP calls. The API is engineered for rapid PDF creation and assembly, typically in milliseconds, leveraging a scalable infrastructure that directs requests to the nearest global zone while ensuring data privacy by refraining from storing client information unless specifically requested. This robust set of features not only makes DynamicPDF indispensable for developers aiming to elevate their applications with PDF capabilities but also enhances user experience through its efficient and user-friendly design. Furthermore, the platform continues to evolve, regularly updating its offerings to meet the changing needs of developers in a fast-paced digital landscape.

Quaterio is an online visual document editor reminiscent of InDesign, specifically designed for web use. Users have the ability to craft multi-page documents that include real pagination, headers, footers, page numbers, and personalized branding, which can be exported as impeccable, print-ready PDFs, removing the reliance on desktop applications or professional designers. Beginning with templates that contain variable placeholders, a single design can produce a multitude of customized documents such as invoices, reports, certificates, contracts, and proposals. The platform is equipped to handle QR codes, barcodes, and PDF form fields, and it also offers CMYK output with trim marks and bleed, ensuring that high-quality printing standards are met. For teams aiming for automation, a REST API allows for the scalable generation of identical documents derived from templates, HTML, or Markdown, featuring batch processing and webhooks. Moreover, it seamlessly integrates with various platforms including WordPress, Notion, Airtable, Shopify, and HubSpot, enabling easy access to live content. Quaterio provides a free tier, while its paid plans grant access to the API, CMS integrations, and options for white-label output, catering to a broad spectrum of user needs. This adaptability solidifies its status as a crucial resource for businesses intent on optimizing their document creation workflow, enhancing efficiency and productivity across the board. In today's fast-paced digital landscape, Quaterio stands out as a powerful ally for professionals striving to produce high-quality documents quickly and effectively.

An innovative API platform is specifically crafted for the intelligent extraction of data from PDF documents, enabling automated parsing of various files. This system allows users to develop reusable low-code templates for data extraction, accommodating multiple languages for OCR alongside tables and fields. It incorporates a built-in invoice parser and offers a range of functionalities such as splitting, merging, reordering, and removing pages from PDF files. Advanced splitting tools enable users to fill out PDF forms and seamlessly add text, images, and signatures to existing documents. Furthermore, it supports auto-filling for interactive fields and can generate PDFs from HTML templates, incorporating conditions, variables, and custom logic as needed. Users benefit from high-quality PDF output with comprehensive control over the production quality, ensuring both security and scalability in their operations. The PDF extraction engine efficiently converts documents into various formats, including raw JSON, CSV, XML, XLS, and XLSX, while retaining the original layout and effectively extracting tables. Additionally, the platform's OCR capabilities not only repair malformed text but also extract multiple types of barcodes, such as QR Codes, Code 128, Code 39, DataMatrix, and PDF417 from PDFs, scans, and images, all powered by an advanced barcode reading engine. With such a broad array of features, this platform is positioned as a comprehensive solution for addressing all PDF-related data extraction requirements, making it an invaluable tool for businesses and individuals alike.