
DocRaptor
pdflayer
PDFCrowd
HTML PDF API
HTML2PDF.fr
Api2Pdf
Docamatic
Convert any HTML documents to high-fidelity PDF using a single POST request

Sawyer
Swiftlier
CourseStorm
Arlo
Enrollsy
Tuio.org
WPAmelia
ClassDuo is class registration software for in-person programs like camps, workshops, and community classes. It lets you create schedules, collect payments, manage waitlists, track attendance, send reminders, and handle waivers—all in one place.

Which is more popular?
Based on our record, PDFShift seems to be more popular. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | pdfshift.io | classduo.com |
| Pricing | ||
| Company | 2018 | Startup from the United States · 1 - 9 employees · 2024 |
| Listed in |
In their own words, as submitted to SaaSHub.


A powerful, fast and high-fidelity HTML to PDF conversion API. Code examples and package ready for Node, Python and PHP developers. Advanced features are available, including watermarking and encryption!
ClassDuo is a modern class registration platform designed for organizations that offer in-person classes, workshops, camps, or community programs. It streamlines the entire registration process, making it easy for staff to create class schedules, publish registration pages, collect payments, and...
What each product offers, as listed by its team.


No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
PDFShift is recommended for web developers, software engineers, and companies that require automated HTML to PDF conversion as part of their applications or websites. It is particularly suitable for those looking for an API-based solution to integrate easily into their existing workflows and systems.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using PDFShift and ClassDuo. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Https://pdfshift.io A simple API that converts HTML documents to PDF or images. - Source: Hacker News / 2 months ago
PDFShift – A cloud API for converting HTML and URLs into PDFs, powered by a headless Chrome backend with support for modern CSS and JavaScript. - Source: dev.to / 10 months ago
Tracking ClassDuo since Jul 2025.
When comparing PDFShift and ClassDuo, you can also consider the following products.

As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
Compare DocRaptor to PDFShift or ClassDuo:

Discover a wonder-filled world of kids classes, camps, events, and activities, right in your neighborhood
Compare Sawyer to PDFShift or ClassDuo:

Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.
Compare pdflayer to PDFShift or ClassDuo:

Swiftlier, the all-in-one platform for educational businesses. Streamline complexity. Maximise potential. Swiftlier cuts through admin with automation, giving you time to sell, lead and educate
Compare Swiftlier to PDFShift or ClassDuo:

Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.
Compare PDFCrowd to PDFShift or ClassDuo:

Impossibly simple course enrollment software.
Compare CourseStorm to PDFShift or ClassDuo: