Free Online File Viewer — View Any File Format
Privacy-first file viewer. Every format renders locally, in your browser — no upload, no account, no waiting.
- 16 file formats
- No file size limit
- 100% client-side
- Works offline
Supports PDF, DOCX, XLSX, PPTX, Images, HEIC, CSV, JSON, Code, Archives, Audio, Video, EPUB, STL, STEP, DXF, DWG
Every format, one tool
Each viewer has its own dedicated page, tuned for that format.
Documents
Media
How it works
Three steps. No account, no upload, no waiting.
1. Choose or drop a file
Drag a file onto the page or click to browse — nothing is sent anywhere yet.
2. View instantly
The right engine renders it in your browser immediately — no server round-trip, no wait.
3. Download when done
Save the original file, or a converted version, back to your device at any time.
How this is actually private
Not just a badge — here's exactly how, so the claim is verifiable.
100% Private
Files never leave your device. There is no server that ever receives your file's contents.
No Uploads
Every format is decoded and rendered locally via WebAssembly or JavaScript. Open your browser's Network tab and confirm nothing is sent.
No Storage
Nothing is written to a server or database. Memory clears the moment you close or reload the tab.
GDPR-friendly by design
There's no file data collection to comply with in the first place — no account, no tracking of file contents, no analytics on what you view.
Verify it yourself: open DevTools → Network tab before opening a file. No request fires with your file's contents — ever.
Why Real File Viewer
Real, working viewers
Every format page ships an actual client-side renderer — pdf.js, Mammoth, SheetJS, Shiki, JSZip, and more — not just a page that claims to view files.
Auto-detected format
Drop any file and it's identified by content, not just its extension, and opened in the right tool immediately — no manual picking.
Browse archives without extracting
Open a .zip and preview individual files inline — images, PDFs, text, and more — without extracting the whole archive.
Installable, works offline
Add it to your home screen or desktop as a PWA, and every viewer keeps working without an internet connection.
Frequently asked questions
Is my data safe?
Yes. Every file format on this site is decoded and rendered entirely inside your browser using WebAssembly and JavaScript — nothing is ever uploaded to a server. You can confirm this yourself by watching your browser's Network tab while opening a file.
What file formats are supported?
PDF, Word (DOCX), Excel (XLSX/XLS), PowerPoint (PPTX), images and HEIC/HEIF photos, CSV, JSON, source code (100+ languages), ZIP/CBZ archives, audio, video, EPUB eBooks, and CAD/3D formats (STL, STEP/STP, DXF, DWG) — with a dedicated viewer page for each.
Is there a file size limit?
There's no hard limit we enforce. The only real ceiling is your device's available memory for very large files.
Do I need an account?
No. There's no sign-up, no login, and no email required for any viewer on this site.
Does it work offline?
Yes. Install Real File Viewer as an app (PWA) from your browser, and every viewer keeps working without an internet connection.