LightPDF vs PDFMerged
LightPDF
lightpdf.comPDFMerged
pdfmerged.comSide by side
| Figure | LightPDF | PDFMerged |
|---|---|---|
| Price from | $1.33/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 5 | 1 |
| Spec score · PDF Merger Software | 9.3 (#3) | 7.8 (#17) |
| Spec score · PDF mergers | 9.2 (#5) | 7.8 (#13) |
| Security | The pricing page states that data is encrypted in transit and at rest and lists ISO/IEC 27001, ISO/IEC 27701, and GDPR. | The maker says its site enforces HTTPS and recommends using an updated browser and keeping the device secure. |
| Support | The pricing page says users can contact live chat or submit a support ticket and receive a response within 24 hours. | For privacy and terms questions, the maker directs users to contact it through its GitHub repository. |
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.
PDFMerged
PDFMerged combines multiple PDFs into one document in a browser and can include JPG, JPEG, and PNG images. Files can be dragged into a preferred order before merging. It requires no installation or account sign-up, and processing happens client-side; the maker says files are not uploaded to or stored on its servers. The Free plan costs nothing and allows unlimited file size and PDF count, subject to available device memory. Password-protected PDFs must be unlocked first. The maker says merging preserves original PDF quality, resolution, and formatting. Its privacy policy says it collects anonymous counts of files merged, language preference, basic browser information, and merge timestamps, but not IP addresses, file names, or file contents. The policy also says it does not use third-party analytics, advertising, or tracking services. The tool is browser-based and listed for Android, iOS, Linux, macOS, Windows, and web. The terms say the service is provided as available and uninterrupted access is not guaranteed.