How to project the documents of your smartphone in class?

Last updated on 12 May 2026

You often need to project the documents from your smartphone onto a computer in class. Whether it is to quickly share an experience photo, a PDF document or a student production, mobile-computer transfer must be simple and fast. Yet, between missing cables and capricious connections, this operation can quickly become "complex" to say nothing else 😤.

How to easily project the contents of your phone on the video projector of the class? Which solutions allow a Simple document sharing and secure? In this article, I will talk about the best apps to transfer files from smartphone to computer. I will focus on Cool Maze, a tool that I find very useful for the school. Thank you to the reader who gave me this idea and she will recognise herself.

Discover five simple solutions to share documents in class. Compare their functionalities and choose the tool that suits you best.

Cool Maze: the simple and effective solution to share documents from your smartphone

A solution designed for the class

The Cool Maze Service stands out for its simplicity of use and its absence of technical constraints. No need to create an account or watch ads. In addition, there is no need to install anything on the class computer. A simple web browser is enough to receive your documents.

How does it work?

1. On the class computer:

• Open your browser
• Visit coolmaze.io
• A QR code is automatically displayed

1. On your smartphone:

• Install the Cool Maze app (available on iOS and Android)
• Select the document to share
• Scan the QR code displayed on the screen

The transfer is instantaneous, and your document is displayed immediately on the class screen.

Examples of use in the classroom include a quick projection of students’ productions, sharing a photo of scientific experience, displaying a correction document or presenting resources found during the course.

GDPR and security

Cool Maze complies particularly well with data protection requirements: it does not carry out any permanent storage, does not collect any personal information and transfers the information directly from one device to another. An essential point for a serene use in school context.

Alternatives to Know

In the face of specific needs or technical constraints, other solutions may be useful. Here is four powerful alternatives to Cool Maze, each with its own strengths.

Zapya: the effective polyglot

Particularly appreciated in international establishments, Zapya offers an interface translated into 6 languages. Its strong point? Transfer without mobile data, convenient in poorly covered areas or when Wi-Fi is unstable.

• Transfer via QR code
• Intuitive interface
• Perfect for large files
• Works offline

LocalSend: the open source solution

For institutions that are aware of free software, LocalSend offers an ethical and transparent alternative for sharing files with your nearby devices. Free, open-source and cross-platform.

• No internet required: Share files directly via Wi-Fi without the need for an internet connection.
• Privacy first: Your files stay local, ensuring the security and confidentiality of your data.
• Cross-platform compatibility: Works perfectly on different devices, making it easy to connect with anyone, anywhere.

Xender: The Champion of Compatibility

The Xender app shines by its versatility and its ability to maintain the original quality of the files.

• Compatible with iOS, Android and PC
• Interface available in 17 languages
• Phone Replicate function useful for backup
• Fast transfer of large files
• Particularly suitable for multimedia files

SendAnywhere: the guardian of confidentiality

For sensitive or confidential documents, SendAnywhere provides an additional level of security.

• Encryption of transfers
• 6-digit code for each shipment
• Support for files up to 10 GB
• Perfect for administrative documents
• Temporary sharing option

Comparative table of solutions

Sharing documents between mobile and computer should no longer be a technical barrier in the classroom. Cool Maze offers the most direct solution for everyday use, while alternatives can cater to more specific needs. Start by testing Cool Maze: its simplicity will surprise you.

Questions you may be asking yourself

Will the app work on my old smartphone?

Most solutions are compatible with recent versions of Android (5.0+) and iOS (11+). Cool Maze is particularly lightweight and works even on older devices.

What if the institution’s Wi-Fi is blocking transfers?

• Zapya and LocalSend allow Wi-Fi-free transfers
• Check with your digital referent which ports to unlock
• Cool Maze uses generally allowed standard ports

What if the QR code doesn't work?

• Check the brightness of the screen
• Clean the lens of your device
• Get closer to the screen

Do the documents remain on a server?

• Cool Maze: Immediate deletion after transfer
• SendAnywhere: encrypted temporary storage
• Other solutions: direct transfer without storage

How can the confidentiality of sensitive documents be ensured?

Choose SendAnywhere for sensitive documents, with its 6-digit code system and enhanced encryption.