Fill vs. MuPDF Comparison


Fill Starboard Systems	MuPDF Artifex Software	+	+
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		Related Products MobiPDF MobiPDF (formerly PDF Extra) is an intuitive and powerful PDF editor and reader designed for today’s modern user - the cost-efficient alternative to Adobe Acrobat Pro you’ve been looking for. FEATURES OVERVIEW: PDF Viewer and Reader: Switch between page views or use "Read Mode" for distraction-free reading. Create and Edit PDFs: Modify text and images or start with a blank PDF. Convert to Office Formats: Easily turn PDFs into Word, Excel, PowerPoint, and image files. Leverage OCR: Transform scanned documents into searchable PDFs. Organize PDFs: Combine, split, reorder, and compress documents. Markup and Comment: Highlight, annotate, and add bookmarks or stamps. Fill PDFs: Seamlessly fill forms or create ones from scratch. Sign PDFs: Sign your documents anywhere—no ink required! Secure Your Work: Protect files with passwords, digital signatures, and 256-bit encryption. Offline Mode: Full functionality without internet access. Translate PDFs 8,085 Ratings Visit Website RAD PDF Add a fully functional PDF editor to your ASP.NET website in minutes! Compatible with 99% of desktop & mobile browsers, from Internet Explorer 6 through the latest iOS Safari release, RAD PDF simply works. No plugins or other software needed. RAD PDF natively supports the most commonly used PDF features. Beyond a PDF reader, RAD PDF equips web applications with a browser-based PDF editor & PDF annotator. Features not even available in Adobe Acrobat Reader can be used to provide advanced PDF functionality. By enabling PDF form filling, PDF redaction, & PDF signing directly in the web browser, RAD PDF users can utilize PDF features without worrying about having the right platform or software installed! Allow your app to design new PDF forms, protect content, sign PDFs, & more using an intuitive graphical user interface (GUI). Client (JavaScript) and server APIs allow for endless possibilities .NET Core, Framework, & .NET 5+ supported Try editing any PDF with RAD PDF, FREE! 3 Ratings Visit Website Adobe Acrobat Adobe Acrobat Studio is a leading enterprise document platform built to scale for global teams — delivering AI-powered document intelligence, trusted PDF tools, and on-brand content creation in one secure solution. Core capabilities include PDF creation, editing, conversion, annotation, redaction, e-signatures, and fillable forms. AI Assistant enables conversational document intelligence across PDFs, Word docs, spreadsheets, and more — surfacing summaries, key insights, and source-linked citations for verified, audit-ready answers. PDF Spaces organizes files, collaboration, and context into centralized knowledge hubs. The Generate Presentation feature transforms any document into a polished, branded deck using AI and Adobe Express templates. Enterprise-grade encryption, admin controls, and compliance workflows support secure document sharing and high-volume document processing at scale — across Legal, Finance, HR, Sales, and more. Available on desktop, web, and mobile. 8,459 Ratings Visit Website Jotform Trusted by over 25 million users, Jotform is an all-in-one, no-code platform that simplifies data collection, automation, and online sales. Using its drag-and-drop Form Builder, businesses can create customized forms and surveys to collect leads, payments, and e-signatures. With 10,000+ templates and advanced features like conditional logic and 200+ integrations, Jotform streamlines workflows. Jotform's AI-powered Agents provide real-time customer support, guiding users through form submissions, answering questions, and ensuring a smooth experience while reducing manual intervention. These AI agents learn from interactions to improve responses, enhancing efficiency and customer satisfaction. The platform also includes a Store Builder to sell products and services, accept payments through 30+ gateways, and tools like Approvals and Report Builder to automate workflows and generate actionable insights. 9,009 Ratings Visit Website TheBestPDF Welcome to our cutting-edge SaaS platform for online document editing and conversion. Designed to meet the needs of businesses and entrepreneurs. TheBestPDF delivers top‑tier file management solutions for teams of all sizes. Use our vault to store your documents in any size and format. Select from various plans to optimize your tools and costs. Use our platform on any devices and operating systems. Keep your business data safe with HTTPS encryption, ensuring every file creation is secure. Redact, insert objects, and sign PDFs easily, making document management smooth for your organization. Our PDF converter makes document conversion fast, perfect for busy teams. Set up your company's document workflows easily with our user-friendly editor interface. Striving for long-term partnerships, we ensure 24/7 availability for customer support. We unite creative minds to deliver integrated solutions that cover your business challenges. 39,558 Ratings Visit Website Adobe Firefly Adobe Firefly is an AI-powered creative platform that enables users to generate and edit images, videos, and other media using simple text prompts. It provides an intuitive workspace where users can create content on an infinite canvas and experiment with different creative ideas. The platform includes tools for editing images, generating videos, and applying effects like generative fill. Users can also access quick actions such as background removal, resizing, and media conversion. Firefly allows creators to remix and build upon community-generated content for inspiration. With its easy-to-use interface, it simplifies complex creative workflows. Overall, Adobe Firefly empowers users to produce high-quality visual content quickly and efficiently. Features include: - Text to Video - Text to Image - Generate Sound Effects - Translate Video - Image to Video - Firefly Boards - Generative Match - Text to Avatar 25,051 Ratings Visit Website Apryse PDF SDK Apryse (formerly PDFTron) powers the future of document technology. We help businesses, developers, and enterprises handle documents with unmatched speed, accuracy, and security. Whether running in secure server environments or delivering seamless web-based experiences, Apryse makes document workflows smarter and easier. With Apryse, you can: Embed powerful document features directly into your apps — from viewing and editing to collaboration and compliance. Run at enterprise scale on secure server infrastructure, ensuring reliability without cloud dependencies. Deliver seamless in-browser document experiences with responsive, accessible, and feature-rich web capabilities. Trusted globally, Apryse empowers organizations to simplify operations, enhance productivity, and create exceptional document experiences. 172 Ratings Visit Website Gaffa Gaffa is a web scraping and browser automation API that gives developers full, real-browser control with a single API call no headless browsers, proxies, CAPTCHA handling, or scaling infrastructure to manage. JavaScript rendering is handled by default, so pages load exactly as they would for a real visitor. Gaffa supports web scraping, AI-powered structured data extraction, screenshot capture, PDF export, infinite-scroll handling, form filling, and converting any webpage into clean, LLM-ready Markdown for AI and RAG pipelines. A rotating residential proxy network ensures reliable access across geographies with automatic anti-bot bypass. Credits are charged only for actual browser execution time and bandwidth used, with no fixed infrastructure costs. 5 Ratings Visit Website PDF Guru PDF Guru is an online PDF tool that enables users to convert, edit, merge, and compress PDFs with just a few clicks. Download your document quickly and with ease. Our PDF converter can create PDF files in seconds! We use HTTPS encryption to protect your digital data when you make PDF files on our platform. Redact a PDF, modify text, add new objects, and perform even more actions all in one place. We designed an intuitive interface so that you can use our PDF maker without any hassle. Our PDF maker works online on all platforms, whether it's Windows, Mac OS, Linux, iOS, or Android. If you don’t want others to open, edit, or print your file, you can lock or restrict access to it. 101,417 Ratings Visit Website Nutrient SDK Nutrient is the deterministic document platform for agents and humans. For more than 15 years, it has built the document infrastructure enterprises rely on when fidelity, control, and compliance matter — SDKs, cloud APIs, low-code integrations for M365 and Salesforce, and a workflow automation platform, now unified with AI assistants, agent tooling, data extraction, and human review into one layer for reliable agentic document workflows. Nutrient powers thousands of organizations, including more than 15 percent of the Global 500, thousands of commercial businesses across 80 nations, and more than 130 public sector organizations in 24 countries. Backed by Insight Partners and based in Raleigh, N.C., Nutrient operates offices in England, France, and Austria, and integrates technology from PSPDFKit, ORPALIS, Aquaforest, Muhimbi, and Integrify. Visit nutrient.io. 113 Ratings Visit Website
About The Quickest Way to Fill, Send & Sign PDFs. PDF is one of the most common formats for legal documents, application forms, business contracts and more. Adobe offers a paid software but it can be slow, costly and take up valuable space on your computer. Fill is a free web-based PDF tool which offers a quick solution when you need to sign a form, fill a form, or send to others to fill and sign. Our built in email ability allows you to send the form directly to the signee from Fill with a personalized email subject and message. Completed forms will be saved on your Fill account with a full paper trail of who signed and when! PDF is one of the most common formats for legal documents, application forms, business contracts and more. Adobe offers a paid software but it can be slow, costly and take up valuable space on your computer. Fill is a free web-based PDF tool which offers a quick solution when you need to sign a form, fill a form, or send to others to fill and sign.	About Add powerful PDF functionality to all of your software application projects. MuPDF is a highly versatile, customizable PDF SDK that can be used as a PDF renderer, viewer, or library. The tiny footprint and lightning-fast performance make MuPDF a perfect fit for mobile browsers, eBooks, and embedded applications where small size is key. MuPDF supports a variety of interactive features including annotations, form filling, digital signatures, redactions, text search, and progressive loading. The wide range of input and output formats and our full range of platform support deliver a flexible solution to easily and successfully fulfill your project’s unique needs. MuPDF supports PDF, XPS, OpenXPS, EPUB, FictionBook 2 and CBZ. The MuPDF API easily integrates with all of the major platforms including Android, iOS, Linux, macOS, OpenBSD, and Windows. C++ and Python bindings have been added making it easy to use the MuPDF library from these languages.
Platforms Supported Windows Not Supported Mac Not Supported Linux Not Supported Cloud Supported On-Premises Not Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported	Platforms Supported Windows Supported Mac Supported Linux Supported Cloud Supported On-Premises Not Supported iPhone Supported iPad Supported Android Supported Chromebook Not Supported
Audience Anyone that needs a solution to fill, sign, and send PDFs	Audience App developers, software engineers, cloud developers, web developers, document management solution developers
Support Phone Support Not Supported 24/7 Live Support Not Supported Online Supported	Support Phone Support Not Supported 24/7 Live Support Not Supported Online Supported
API Offers API Not Supported	API Offers API Not Supported
Screenshots and Videos View more images or videos	Screenshots and Videos View more images or videos
Pricing $9 per month Free Version Supported Free Trial Supported	Pricing $749/per platform* *Price for MuPDF App Kits for Android & iOS only. Licensing fees for the MuPDF API are determined on a case-by-case basis. Free Version Not Supported Free Trial Supported
Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software	Reviews/Ratings Overall 5.0 / 5 ease 5.0 / 5 features 4.0 / 5 design 5.0 / 5 support 5.0 / 5 Read all reviews
	Pros & Cons from Real Users Pros I'm looking for applications that are open, to get my privacy back. Simple to use, efficient and private. And they must be FOSS. Cons Does exactly what it is designed for, not much options.
Training Documentation Supported Webinars Supported Live Online Not Supported In Person Not Supported	Training Documentation Supported Webinars Not Supported Live Online Not Supported In Person Not Supported
Company Information Starboard Systems Founded: 2017 United Kingdom fill.io	Company Information Artifex Software Founded: 1993 United States artifex.com
Alternatives Xodo Apryse	Alternatives Foxit PDF SDK Foxit Software
PDF Editify	jOfficeConvert Qoppa Software
Apple Preview Apple	jPDFPrint Qoppa Software
MobiPDF MobiSystems	Nutrient SDK Nutrient
PDFill PlotSoft View All	KDAN PDF Kdan Mobile Software View All
Categories PDF Supported PDF Editors Supported	Categories PDF Supported PDF Annotators Supported PDF APIs Supported PDF Editors Supported PDF Readers Supported PDF Redaction Supported PDF SDK Supported
PDF Features Annotations Supported Convert to PDF Supported Digital Signature Supported Encryption Supported Merge / Append Not Supported PDF Reader Supported Watermarking Not Supported	PDF Features Annotations Supported Convert to PDF Supported Digital Signature Supported Encryption Not Supported Merge / Append Supported PDF Reader Supported Watermarking Supported PDF Editors Features Access Controls / Permissions Not Supported Annotations Supported Commenting / Notes Supported Compare Side-by-Side Not Supported Customizable Branding Supported Delete Pages Supported Electronic Signature Supported Forms Management Supported Full Text Search Supported Merge / Append Supported Offline Access Supported Optical Character Recognition (OCR) Not Supported Rearrange Pages Supported Rotate Pages Supported Watermarking Supported
Integrations No info available.	Integrations No info available.
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