FileSystem Online
FAQ
Does FileSystem Online upload my files anywhere?
No. All reading and (optional) writing happens locally in your browser. Nothing is sent to any server.
What is the difference between “Open Folder” and “Open Read-only”?
- Open Folder uses the File System Access API (Chrome / Edge and a few others). You can create, rename, delete and save files and folders in the chosen directory.
- Open Read-only lets you pick a snapshot of files via the standard file picker. You can browse and preview, but not modify anything.
Why are the New / Rename / Delete / Save buttons disabled?
- You are probably in read-only mode (opened via “Open Read-only”).
- Or your browser does not support the File System Access API for writable folders.
- Switch to a compatible browser (for example Chrome or Edge) and use “Open Folder” for write access.
Can I use FileSystem Online without internet?
Yes. Open the viewer, save the page as an HTML file and open that file directly in your browser. All functionality remains local.
Which browsers are supported?
- Writable mode (Open Folder) requires a browser with the File System Access API, such as Chrome or Edge.
- Most modern browsers can use the read-only snapshot mode.
- Older browsers may work partially but are not officially supported.
Why can’t I see my entire disk or system root?
Browsers work inside a sandbox and only get access to the folder you explicitly select. The app cannot scan your full disk and cannot escape the directory you granted permission for.
Is it safe to use on my main project folders?
FileSystem Online never sends files to a server, but write actions are real: creating, renaming, deleting and saving files affects your actual folder. Treat it like a lightweight file manager – double-check before deleting anything and consider testing on a copy first.
Why can I not edit very large files?
The built-in editor is meant for reasonably sized text files. Very large files may be slow or stay read-only. For heavy editing, open the file in a dedicated code editor or IDE instead.
Can I share this app with others?
Yes. It is a single HTML-based tool – easy to share as a link or saved file. Remind people it is donationware if they find it useful.
Donationware
The app is free to use. If it saves you time or proves helpful, please consider supporting the project. Thank you!
How do you fund this project?
FileSystem Online is developed as part of the Q-AI ecosystem. Q-AI focuses on building small, focused web tools that run locally and respect user privacy.
This project is primarily supported through voluntary donations. There are no ads, no tracking, and no monetization of user data.
Q-AI also develops other tools, such as eCMS and TeslaCam Online. Together, these projects allow continued development without relying on subscriptions or intrusive revenue models.
Learn more about Q-AI at Q-AI.nl.
Troubleshooting checklist
- Reload the page and re-open your folder.
- If write actions stay disabled, try Chrome or Edge and use “Open Folder”.
- If previews fail, try another browser or a smaller test folder.
- For sensitive data, consider working on a copy while you explore the tool.
Credits
FileSystem Online is a small, independent tool for managing local files directly from your browser. It is designed for personal use and does not collect analytics or tracking data.