Frequently Asked Questions

Everything you need to know about Online File Opener. Can't find the answer you're looking for? Feel free to contact us.

Is this service free to use?

Yes, Online File Opener is completely free to use for personal and professional use. We believe in making file access easy and accessible for everyone.

What file formats do you support?

We support a wide range of formats including Archives (ZIP, RAR, 7Z, TAR), Documents (PDF, DOCX, XLSX), Code files (JS, PY, JSON, XML), Images (HEIC, WebP, TIFF), Audio, Video, and Databases (SQLite, CSV).

Are my files secure?

Absolutely. We use secure HTTPS encryption for all transfers. More importantly, we do not store your files. They are processed in a temporary environment and are automatically deleted shortly after you finish viewing them.

Do I need to install any software?

No installation is required. Our viewer runs entirely in your web browser. This means you can view files on any device—Windows, Mac, Linux, or mobile—without downloading suspicious software.

Can I edit files here?

Currently, we focus on providing a high-quality viewing experience. While you can interact with some files (like filtering CSVs or querying SQLite databases), full editing capabilities are limited to ensure file integrity.

Is there a file size limit?

Yes, to ensure performance for all users, there are size limits depending on the file type. Generally, files up to 100MB-2GB are supported depending on the specific viewer tool.

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