Open any file safely.
Your device never touches it.
Upload a suspicious document, PDF, or image and preview it inside our fully isolated cloud environment. Malware, macros, and exploits run on our servers not yours.
Drag and drop a file here, or browse
.doc, .docx, .xls, .xlsx, .ppt, .pptx, .pdf, .txt, .jpg, .jpeg, .png, .svg · max 20 MB
The file is opened inside a fully isolated cloud environment managed by us. Your device never handles the content. Malicious macros, scripts, and exploits are contained in our sandbox and cannot reach you.
Want this done automatically on every email your team receives?
Our Email Security Platform sandboxes every link automatically.
How It Works
What happens when you open a file in our sandbox
We open the file on our servers inside an isolated virtual machine, not on your device. Here's exactly what that means.
Upload once, view safely
Your file is transmitted directly to our isolated cloud environment. We open it inside a fresh virtual machine that has never been used before and is destroyed after your session ends. Nothing is stored permanently.
Malware runs in our container, not yours
If the file contains malicious macros, embedded scripts, or exploit code, all of it executes inside our sandbox. Your operating system, browser, and files are never exposed. You simply see the rendered document.
Links inside documents are also scanned
Many malicious documents contain hyperlinks that deliver the final payload. Any link you click inside the sandboxed document is automatically scanned by our threat intelligence engine before it opens.
Supported File Types
Documents, spreadsheets, PDFs, images, and more
The file types most frequently used to deliver malware via email are all supported.
For Security Analysts
More than IOC lookup. A full analyst toolkit.
Our Threat Intelligence Platform includes a full suite of security tools beyond URL lookup. DNS analysis, email header parsing, file hash checking, CIDR conversion, redirect tracking and more. All free.
FAQ
Questions about opening files safely in a sandbox
Yes. The file is opened in a completely isolated virtual machine on our servers. It never reaches your device beyond the upload itself. Any exploit, macro, or script it contains runs inside our contained environment and is immediately destroyed when your session ends.
We support the formats most commonly weaponised in email attacks: PDF, DOCX, DOC, XLSX, XLS, PPTX, PPT, TXT, JPG, JPEG, PNG, and SVG. The maximum file size is 20 MB per upload.
No. The file is loaded into a temporary virtual machine for the duration of your session and permanently deleted when the session ends. We do not retain document contents.
VirusTotal scans the file with antivirus engines and gives you a verdict. Our sandbox actually opens the file and lets you see exactly what it renders and what it tries to do — network requests, scripts, embedded links. You also interact with the file in real time, not just receive a pass/fail score.
Absolutely. Our paid plans include an Outlook add-in that automatically routes every attachment from an employee's inbox through our sandbox before it can be opened. No behaviour change for employees — attachments just open in our safe viewer instead of locally.
3 free sessions per day for unregistered users, tracked by browser. Register free for 10 sessions per day. Paid plans include unlimited sessions plus full threat reports, IOC extraction, and admin dashboards.
Learn More
Why opening attachments in a sandbox is safer than antivirus
Antivirus scans signatures. Sandboxes observe behaviour.
Most modern malware is polymorphic — it changes its signature to evade antivirus. A sandbox does not care about signatures. It runs the file and watches what it actually does: network calls, registry changes, process spawning. Behaviour cannot be hidden.
Email attachments are the top malware delivery vector
Over 90 % of successful cyberattacks begin with a malicious email attachment. A macro-laden Excel spreadsheet or a PDF with an embedded exploit bypasses most email gateways because it looks like a normal business document. A sandbox sees through that.
One click away from a breach
Many malicious files don't need any macros at all. A crafted JPEG can exploit an unpatched image parser. A PDF can launch a script just by being opened. Opening an unknown file in a sandbox means that even zero-day exploits run on our infrastructure, leaving yours untouched.