The Privacy Test Every PDF User Should Run
Open any "free online PDF tool." Drop in a document. Open DevTools → Network tab.
You just sent your file to a server.
For most documents this is fine. For tax returns, signed contracts, or medical records — it's not.
The Test
Try this with the top 5 Google results for "compress pdf online":
- Upload a PDF
- Watch the Network tab
- See your file sent via POST to an unknown server
The privacy policies tell you what happens next:
- Smallpdf: deleted after 1 hour
- iLovePDF: deleted after "a few hours"
- Some services claim rights to "analyze your content"
The Alternative
PDF Toolbox does all processing in your browser using WebAssembly. Open DevTools, use any tool, and watch: zero network requests after page load.
- Compress, merge, split, convert PDFs
- PDF to Word, PDF to JPG, protect/unlock
- No signup, no limits, no tracking
- Works offline after page load
Why This Matters Now
AI companies are scraping the web for training data. PDF tools that store your files on their servers — even temporarily — create another vector for your data to end up in training sets you never consented to.
Browser-based processing eliminates this risk entirely. If the file never leaves your device, it cannot be scraped, leaked, or analyzed.
Try the test yourself: pdftoolbox.tech
Source: github.com/hwlsniper/pdftoolbox
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