LightPDF vs PDF4QT
LightPDF
lightpdf.comPDF4QT
github.comSide by side
| Figure | LightPDF | PDF4QT |
|---|---|---|
| Price from | $1.33/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 5 | 1 |
| Spec score · PDF editors | 9.2 (#6) | 8.1 (#44) |
| Downloads | Official downloads are provided for Windows, macOS, iOS and Android, with web and Chrome/Edge extension access also linked. | The project lists Windows installer and ZIP downloads, plus Linux AppImage and Flatpak packages. |
| Free plan | Yes | Yes |
| Product | LightPDF describes itself as an AI-powered PDF solution for editing, converting, annotating, signing, organizing, and chatting with documents. | PDF4QT is an open-source PDF toolkit with desktop applications, command-line tools, and a C++/Qt PDF engine. |
Plans
LightPDF
- Free PlanFree
- Monthly Plan$5.99 a month
- Yearly Plan$15.99 a year
- Lifetime Plan$39.99 a month
- Lifetime Plan$39.99, paid once
In their own words
LightPDF
LightPDF is an AI-powered PDF service for editing, converting, annotating, signing, organizing, and chatting with documents. Its AI Agent accepts chat requests for tasks such as merging, conversion, watermark removal, page numbering, and compression. Other listed AI features include translation, image processing, data extraction, invoice generation, and document enhancement. LightPDF offers a conversion API for PDFs and office documents, including Word, Excel, PowerPoint, images, HTML, and text. It is available on the web, Android, iOS, macOS, and Windows, with a Chrome/Edge extension. The free plan is web-only, limits files to 10MB, includes five cloud files for one year, and allows three AI Agent questions per day. Monthly and yearly plans include 1,000 AI credits per month; the lifetime plan includes 40,000 credits valid until used. Monthly costs $5.99 a month, Yearly costs $15.99 a year and includes a 3-day free trial, and Lifetime costs $39.99 a month. Premium features can be used on one device at a time.