Stop Uploading Your Personal Files to Random “Free” Compression Sites (university.witty.computer)

submitted 6 months ago by cm0002@toast.ooo to c/privacy@programming.dev

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Every time you upload a PDF or image to a random “free” compression site, you’re handing over the full file (sometimes including hidden metadata like GPS location, device info, and embedded text) plus your IP address and usage data.

You have no idea how long it’s stored, logged, or reused. Compression doesn’t require a server; it can run entirely in your browser.

Witty University built a simple local HTML tool that compresses PDFs and images 100% offline, nothing gets uploaded: https://university.witty.computer/product/universal-local-compressor-private-pdf-image-optimizer-runs-100-in-your-browser/

Privacy is basic hygiene.

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[-] CameronDev@programming.dev 12 points 6 months ago

It is a perfect honeypot. Do local compression for the majority, but if the IP comes from a government IP block, serve a different page and upload...

[-] OwOarchist@pawb.social 5 points 6 months ago

Just in case somebody's trying to compress the unredacted Epstein files. Gotcha.

this post was submitted on 19 Feb 2026

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