The problem with "free" converter sites
The free-PDF-tools business has settled into a pattern. You upload a document, the site does thirty seconds of work, and then one of three things happens: a paywall appears at the download button, a "free trial" quietly becomes a monthly subscription, or your daily allowance runs out mid-task. Underneath all three sits a quieter problem — your document is now on their server. The FBI has publicly warned that some free online file converters are used to deliver malware or scrape the contents of what people upload. For files like contracts, IDs, bank statements, and medical records, "we delete uploads after an hour" is a promise you can't check.
Our answer: don't upload anything, ever
Modern browsers are powerful enough to do this work themselves. PdfAdapter packages the whole processing engine into each tool page — when you merge, compress, split, rotate, sign, or convert, the computation runs on your own device, and the network stays silent. This isn't a policy we ask you to trust; it's an architecture you can verify. Open your browser's developer tools, watch the Network panel while a tool runs, and see for yourself that your file goes nowhere.
The same architecture is why everything here stays genuinely free. A site that processes files on its servers pays for every job, and that bill eventually becomes your subscription. Our serving cost is close to zero, so there's no meter running, no daily cap, and no reason to ambush you at the download button.
Honesty as a feature
Browsers have real limits, and pretending otherwise is how users get burned. So the tools here say the quiet parts out loud: the compressor tells you when your file would come out bigger and to keep the original; the Word converter explains exactly which formatting survives; files past 200 MB are declined up front with a pointer to desktop software that can handle them. If a tool can't do a job properly on your device, it isn't on this site.