PDF guides & know-how
LayerX's 2025 report measures shadow AI: 40% of files uploaded to GenAI tools hold personal or payment data; nearly four in ten uploads go through personal accounts.
Between the drop zone and the download link, your PDF crosses servers, subprocessors and logs. A close read of iLovePDF, Smallpdf and Adobe's actual policies.
How a PDF tool can run entirely inside your browser — compiled engine, tab memory, zero network upload — and why the upload is the real risk of online PDF tools.
How local PII detection works in Document Flare: structured identifiers, checksums, keywords — and the honest limits to know before redacting a document.
A black box leaves text extractable, and even removed text leaks through glyph positions. What the research says — and why rasterization is the correct answer.
Merge, compress, redact, OCR, AI summaries — every PDF tool runs locally in your browser. No upload, no account. Verify it yourself in the Network tab.
A dive into the local architecture: file parsing, workers, PDF and OCR engines running in the browser. What actually happens when you drop a large document.
AES-256, AES-128 or RC4? How to check a protected PDF's real algorithm, why password encryption doesn't do everything, and why Document Flare always produces AES-256.
A reproducible method to check in the Network tab whether a PDF tool actually uploads your document — or processes it locally in the browser.
