Best Free PDF APIs of 2025

Pdftools can help you process thousands of documents, or even millions. The suite of SDKs from Pdftools is designed for industries that are document-intensive. They will make your document workflows faster, easier, and less stressful. The Pdftools products are built on SDKs or APIs. They integrate seamlessly with your existing systems and applications. Process thousands of documents per minute. Our tools are designed to be fast and efficient. We are engineers at heart and only accept the most reliable, usable and well documented platforms. File sizes can be reduced, but quality and interactivity are not compromised. Your documents will be compliant with long-term archiving. We have documented every detail of our products so that you can easily get started.

Our API and web application allows you to easily generate PDF documents such as invoices, letters and other documents. Prepare your Word template by adding tags to the places where you would like dynamic text. Then, provide the data in JSON or an Excel file. The template will generate a document for each data item by replacing the tags in the template with the actual data. The advanced customization features can help your business create PDF documents for any application with minimal effort. The merge tags are detected automatically after uploading the template based on its content. Our REST API allows you to create personalized experiences for your company. Generate thousands of PDF documents in bulk, such as invoices, letters and contracts. Call the Generate Document API with your data, and within seconds a PDF document will be created from the specified template.

pdfRest API Toolkit was made by developers, for developers. Rapidly integrate PDF workflows with your business applications, simply and seamlessly. pdfRest API Toolkit includes all the PDF processing tools you'll need, designed and developed by digital document experts with decades of experience to make your job easy: PDF to Word, PDF to Excel, PDF to PowerPoint, Add to PDF, Extract Text, Query PDF, Convert to PDF, PDF to Images, Convert to PDF/A, Convert to PDF/X, Compress PDF, Linearize PDF, Flatten Forms, Flatten Transparencies, Flatten Annotations, Flatten Layers, Merge PDFs, Split PDF, Encrypt PDF, Decrypt PDF, Restrict PDF, Watermark PDF, Import Form Data, Export Form Data, OCR PDF, Upload Files, Zip Files. Clear documentation with intuitive endpoints and parameters. Start with sample code in .NET, JavaScript, Python, PHP, and cURL for every endpoint. Gold-standard processing powered by Adobe® PDF Library™. Free to get started with no commitment. Affordable pricing for projects of all sizes. pdfRest was designed for developers, by developers to make working with PDFs as easy and intuitive as possible. Flexible APIs can be called from any language capable of making an API request. Send your first API call in

KDAN PDF Reader is your all-in-one PDF solution. Edit, sign, OCR scan, convert, annotate, and fill forms in PDF documents. With innovative AI features, speed up your document workflow! Designed for Mac, iPhone, and iPad, KDAN PDF Reader is trusted by millions for its comprehensive features and efficiency. KEY FEATURES EDIT TEXT & PDF • Fix errors and typos directly in PDF - replace, add, or delete text in PDFs • Add, edit, crop, and adjust images in PDFs • Add header & footer • Add Bates numbering for easy reference, tracking, and organization • Use stamps or dynamic stamps to indicate status, provide feedback, and highlight information in a document CONVERT PDF • Offline file converter - convert file without an internet connection • Convert PDF to Office file formats, image, or ePub • Format supported- docx, xlsx, csv, pptx, rtf, txt, html, jpg, png, BMP, jpg200, pub, MOBI SIGN & FORMS • Fill & edit forms • Create fillable forms with buttons, checkboxes, and list boxes • Create signature and sign on PDF • Create signatures using trackpad, keyboard, or images EDIT PAGE • Merge & split PDFs • Extract, rearrange, rotate, delete, and crop PDF pages • Change PDF background color • Append pages from

ComPDFKit offers a top-quality PDF SDK, PDF API, and PDF Server for companies, organizations, small businesses, and developers. It enables you to integrate PDF document annotation, editor, conversion, form filling, and signing into your applications or products, saving you time and expenses. ComPDFKit is compatible with Windows, Web, Android, iOS, Mac, Linux, and other cross-platform frameworks such as React Native, Flutter, and Electron with just a few lines of code. ComPDFKit Updates: 1. ComPDFKit API Sign up and Get 1000 Free Files Processing Monthly. Allow you to edit & convert PDF files, split/merge/insert/rotate/delete/extract PDF pages, and process PDFs with OCR. 2. Free Online Tools Work with PDF in ComPDFKit online PDF tools to convert PDF files to/from docx, xlsx, pptx, png, jpg, html, txt, csv, rtf files, etc. 3. Web Demo View, Edit, Annotate, Compare, Sign, Encrypt, Decrypt, watermark PDF files, and Create/fill out PDF forms online for free. 4. Community License Start-ups and Individual developers can get affordable prices from ComPDFKit. We help you to build your customized applications with a special price and discount.

With PageToPDF @ Aypeye, converting a web page or website to PDF has become easier than ever before. Our SaaS cloud-hosted PDF converter is capable of quickly and easily converting any webpage into a high-quality PDF file, and it is completely free to use online. In addition, PageToPDF also provides an API for bulk PDF conversion, which is ideal for those who need to convert multiple webpages at once. All you have to do is enter the URL of the webpage you want to convert, and our advanced software will automatically generate a professional-looking PDF document for you. Our PDF generator is perfect for professionals who need to save important web content for reference or sharing with clients, as well as for students who need to save online articles for research or study purposes. The best part? There are no monthly fees or contracts. PageToPDF is a Pay As You Go model, which means you only pay for what you use.

PDFMonkey provides an effective way to meet your PDF generation requirements. With the use of web technologies and a straightforward REST API, creating stunning documents has never been simpler. Don't let valuable time slip away! Reduce development efforts as there’s no longer a need to write extensive code for PDF creation, deal with complicated configurations, or navigate through dependency issues. We take care of all the intricate details on your behalf, allowing you to focus on what truly matters. Embrace the ease of document generation with PDFMonkey today!

Discover a comprehensive toolkit designed to help ensure the success of your projects: it offers features like image resizing and CDN services, PDF and screenshot generation, currency exchange options, discount management, email validation, and QR code creation, among others! With our innovative color generator, you can effortlessly create a distinctive shade from text, convert colors between HEX, RGB, and HSL formats, and generate color palettes inspired by an initial color or text input. Image manipulation becomes a breeze with this API, allowing for easy customization and delivery of images through a Content Delivery Network. Effortlessly calculate readability scores, estimate reading times, and assess sentiment for any given text. Generate flawless QR codes in both image and vector formats that are fully customizable and simple to create, perfect for promoting events, offering discounts, or sharing links. Additionally, you can retrieve detailed information about a Spotify profile, including their name, follower count, popularity, profile picture, monthly listeners, biography, links to social media, top songs, and the geographical locations of their most dedicated listeners, making this toolbox an invaluable resource for any project. Whether you're a developer or a marketer, this API provides everything you need to elevate your work and engage your audience effectively.

WebPDF is an online service that provides an easy an accessible way to alter PDF files. You can do any of the following operations using the web interface, but there's also a developer friendly API that you can integrate into your own application: Merge multiple PDFs Split PDF Compress PDF Extract PDF metadata Flatten PDF forms Extract images from PDF Extract text from PDF Lock & Unlock PDF OCR PDF Change PDF size Change PDF version Watermark PDF Optimize PDF for web Etc. There are many other tools not mentioned here and lots more to be released. You can try WebPDF for free, even without an account.

Our APIs make it easy to automate document processing in your software. All APIs accept input documents (photo or PDF) and return a structured reply with all the information that you require. Instant processing ensures the best UX. High-quality results regardless of image quality. Get structured data, no post processing required. To make it easy for developers to create robust APIs that are ready to use, we apply state-of-the-art deep learning research to the field. Our algorithms find the relevant information in the image before reading it, unlike traditional OCR. This new paradigm breaks down the traditional OCR performance barriers in terms speed, accuracy, and robustness. No training, templates or setup required. Software developers can access our APIs through plug-and-play. An API-first platform, designed for developers. Developers get a free plan, with no credit card. Synchronous cloud-based APIs

Anvil is a customizable embedded logic-based workflow platform that provides companies with a high volume PDFs that need to be filled out, generated, maintained and/or signed.

DynamicDocs API, a JSON-to-PDF API that is based on LaTeX provides a way to create PDF documents in bulk and include tables, graphs, logic, and charts in the templates. DynamicDocs API allows users to create their own templates or to use existing JSON-to-PDF templates, which do not require any knowledge of LaTeX. The API produces high-quality PDFs that are dynamic and web-optimized.

A swift, dependable, and user-friendly API for converting HTML to PDF. PDFShift serves as an effective tool for transforming HTML and CSS files into high-quality PDF documents, enabling developers to automate their document conversion processes seamlessly and without the burden of maintenance expenses. This API ensures that you always have access to the latest features and improvements, enhancing your workflow efficiency.

A free REST API that allows you to create, edit and manage PDFs using programmatic methods. Features include rotating and deleting of pages, password protection, compression of files, and background execution. It's a great tool for developers who need to handle PDFs seamlessly. There are no fees, and only an API token is required.

PDFBolt, a powerful HTML-to-PDF API, allows businesses and developers to create high-quality PDFs with ease. Our developer-friendly API produces pixel-perfect, GDPR-compliant PDFs in just seconds. Key Features Instant HTML and URL conversion to PDF. Customizable layout for PDF - headers and footers, margins and page formatting. Secure processing that is GDPR compliant. Requests for synchronized and async APIs. Webhooks, direct S3 uploads. Dashboard Admin - Track usage, manage API Keys, and monitor detailed logs. Comprehensive documentation and responsive support. Free Forever Plan: 500 PDFs/month. PDFBolt: No mess, no setup, just PDFs!

An API platform designed for intelligent extraction of data from PDFs facilitates automated parsing of documents. Users can create reusable low-code templates for data extraction, supporting multiple languages for OCR as well as tables and fields. The platform features a built-in invoice parser along with capabilities to split, merge, reorder, and delete pages in PDF files. Advanced splitting tools are available, allowing for the filling out of PDF forms and the addition of text, images, and signatures to existing documents. It also includes auto-filling for interactive fields and the ability to generate PDFs from HTML templates while allowing for conditions, variables, and custom logic. Users enjoy high-quality PDF output with full control over quality, ensuring secure and scalable operations. The PDF extractor engine converts documents into formats such as raw JSON, CSV, XML, XLS, and XLSX while preserving layout and efficiently extracting tables. Additionally, the platform offers OCR capabilities to repair malformed text and extract various barcode types, including QR Codes, Code 128, Code 39, DataMatrix, and PDF417 from PDFs, scans, and images, all supported by a high-performance barcode reading engine. With such robust features, this platform stands out as a comprehensive solution for all PDF-related data extraction needs.