Privacy & Security
How do I know ZeroCloudPDF does not upload my files?
You can verify this yourself. Open Developer Tools in your browser (F12), go to the Network tab and clear the log. Then drag a file into the converter and run a conversion. If a tool uploads your file, a large POST request matching your file size will appear in the Network tab. With ZeroCloudPDF, no such request appears — processing happens entirely in your browser memory.
What happens to my files when I close the browser tab?
They are permanently gone. ZeroCloudPDF never writes your files to server disk, browser cache, or localStorage. Once the tab closes, browser memory is cleared and no trace of your document remains anywhere. This is by design, not just policy.
Does ZeroCloudPDF read EXIF data or GPS coordinates from my images?
No. EXIF data, GPS coordinates, camera model, and timestamps embedded in image files are never read, stored, or transmitted. ZeroCloudPDF accesses only the raw pixel data needed to build the PDF. Your location data and device information stay entirely on your device.
How is ZeroCloudPDF different from SmallPDF or ILovePDF?
SmallPDF and ILovePDF upload your files to remote servers for processing and delete them after one to two hours. During that window your documents exist on someone else’s computer — potentially in a different legal jurisdiction, accessible to staff, and at risk in a data breach. ZeroCloudPDF processes everything locally in your browser, making it technically impossible for us to access your files at any point.
Technical
Can I use ZeroCloudPDF offline?
Yes. Once the page has fully loaded, you can disconnect from Wi-Fi and the converter will still work. All conversion code and libraries download on the initial page load. No server connection is required during file processing. This is only possible because everything runs client-side.
What open-source libraries does ZeroCloudPDF use?
ZeroCloudPDF uses mammoth.js for Word document conversion, jsPDF for PDF generation, and PDF.js for PDF page rendering and export. All three are established open-source libraries with public repositories that anyone can inspect. We name them because verifiability matters for a privacy tool.
Is there a file size limit?
The practical limit depends on your device RAM rather than a server-imposed cap. Desktop browsers handle files up to 100 MB comfortably. Mobile browsers work well up to 20 to 50 MB. If your device runs low on memory during processing, the tool will fail gracefully in your browser — it will not route the file to a server as a fallback.
What image formats does ZeroCloudPDF support?
ZeroCloudPDF supports JPEG, PNG, WEBP, HEIC (iPhone photos), GIF, BMP, TIFF, and SVG. All formats convert to PDF directly in your browser. HEIC files from iPhones are decoded using a JavaScript implementation — no server-side codec required.
Using the Tools
Does ZeroCloudPDF work on iPhone?
Yes. ZeroCloudPDF works in Safari on iPhone on iOS 14 and later. You can compress PDFs, convert HEIC photos to PDF, merge PDFs, and convert Word files to PDF directly in Safari without installing any app. Files are selected from the Files app or Camera Roll and processed locally on your device.
What is ZeroCloudVault and is it private?
ZeroCloudVault is an optional cloud storage service, separate from the free conversion tools. Files are stored in Google Cloud Storage with Google-managed encryption and are access-controlled by your account credentials. Only authenticated users can access their own files. The free PDF tools and Vault are architecturally separate products.
Do I need an account to use the PDF tools?
No. All PDF conversion tools — image to PDF, compress, merge, Word to PDF, and PDF to image — are completely free and require no account or signup. ZeroCloudVault requires an account because it stores files on your behalf, but the conversion tools do not.
Can I export PDF pages as PNG images?
Yes. ZeroCloudPDF can export any PDF page as a high-quality PNG image with full transparency support. Each page exports as a separate PNG file. Useful for design work, presentations, or sharing specific pages while preserving image clarity. All processing happens in your browser with no upload.
Ready to Try It?
Open the Network tab in Developer Tools and watch nothing get uploaded.