Is It Safe to Convert Files Online? Privacy Guide
The Honest Answer: It Depends
Online file converters range from completely safe to outright dangerous. The tool itself isn't inherently risky — the risk depends on who operates it, what they do with your files, and whether the connection is secure. Most reputable converters process your file and delete it within minutes. Sketchy ones may keep copies, inject malware, or mine your data.
Green Flags
HTTPS connection (padlock icon in browser). Clear privacy policy stating files are deleted after conversion. No account required for basic conversion. Open-source or transparent about processing. Company has a known reputation. Browser-based processing (files never leave your device). CocoConvert processes conversions in your browser when possible and deletes server-processed files immediately after download.
Red Flags
No HTTPS (data sent unencrypted). Requires installing desktop software for a simple conversion. Asks for unnecessary permissions. Excessive ads or pop-ups (often indicative of malware). No clear privacy policy. Unclear ownership — no 'About' page, no company details. Forces account creation to access basic features.
What About Sensitive Documents?
For confidential contracts, medical records, financial statements, or anything containing personal data, use offline tools when possible. LibreOffice (free) handles most document conversions. Photoshop, GIMP, and Preview handle image conversions. FFmpeg handles video/audio. If you must use an online tool, choose one that processes files in-browser (client-side) so data never reaches a server.
How CocoConvert Handles Privacy
CocoConvert performs most conversions directly in your browser using WebAssembly — your files never leave your device. For conversions that require server processing (like complex video transcoding), files are encrypted in transit (HTTPS), processed in isolated containers, and deleted immediately after the converted file is downloaded. No files are stored, logged, or used for any other purpose.