Guides
Longer explanations of the things the tools on this site do — written to be useful whether or not you use FileWash.
How to Check Whether an Online File Tool Is Actually Uploading Your Files
Two checks you can run yourself in about a minute settle the question directly — no need to trust anyone’s marketing copy, including ours.
ReadWhat Popular Online File Tools Say They Do With Your Uploads
A dated, sourced snapshot of what widely used PDF and image tools state in their own published policies — quoted verbatim, with links.
ReadClient-Side vs Server-Side File Processing: What a Browser Can and Cannot Do
WebAssembly moved most everyday file work into the browser — but server-side processing still genuinely wins for several real jobs.
ReadWhat Is Actually Inside Your Photo’s Metadata, and How to Strip It
Every photo your phone takes carries hidden data that can include GPS coordinates, a device serial number and an exact timestamp.
ReadWhy Your PDF Is 40 MB, and Which of the Four Causes You Actually Have
PDF size comes from a small number of distinct causes, and which one you have decides whether compression will help at all.
ReadPNG, JPG, WebP and AVIF: Which Image Format for Which Job
Choosing a format is a short decision tree, not a ranking — each one throws away something different.
Read