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Guides

Private file tips & how-tos

Practical guides on handling sensitive files — redaction, metadata, formats and more — and how to do each one without uploading anything.

How to Redact a PDF So It Can't Be UndoneA black rectangle hides text from your eyes, not from a copy-paste — here's why most "redacted" PDFs leak, and how flattening to pixels makes the redaction permanent.Is it safe to upload documents to online PDF and file tools?The honest answer depends on one question most tools never make obvious: does your file actually leave your device — and if it does, where does it go and for how long?How to Remove GPS Location and EXIF Metadata From PhotosMost cameras quietly stamp the exact latitude and longitude of where a photo was taken into the file itself. Here's how to find that hidden data, why it matters, and how to strip it on every device.HEIC vs JPG: what the difference is, and when to convertYour iPhone shoots HEIC to save space at higher quality, but the rest of the world still runs on JPG. Here is exactly what changes between the two, and when converting is worth it.