About PDF Toolkit

Every tool on this site runs inside your browser. Your PDFs are never uploaded to a server — not to ours, not to anyone's. This page explains why we built it that way and how you can verify it.

The problem we started with

Search for "merge PDF" or "compress PDF" and you will find dozens of sites that all work the same way. You upload your file, a server somewhere does the work, and a line of small print promises the file will be deleted within an hour — a promise you have no way to check. The documents people process this way are rarely trivial. They are bank statements, salary slips, Aadhaar and PAN copies, marksheets, medical reports, signed agreements. Handing those to an anonymous server is a real risk that most people take because they assume there is no alternative.

What we do instead

There is an alternative, and it has been sitting in your browser for years. Modern browsers can read, rewrite and render PDFs directly using well-established open-source engines. We use pdf-lib to manipulate pages, pdf.js — the same engine built into Firefox — to render and read them, and qpdf compiled to WebAssembly for genuine AES-256 encryption. All of it runs on your device.

This is not a privacy promise you have to take on faith. It is an architecture you can verify. Open your browser's developer tools, switch to the Network tab, and use any tool on this site. You will see the page load and a library arrive once from a CDN — and then nothing. No upload, because there is nowhere for your file to go.

What this changes for you

Because there is no upload, there is no file size limit beyond your own device's memory, no daily quota, and no queue. Tools keep working even if your connection drops after the page has loaded. And page operations are lossless: merging and splitting copy pages between documents without re-encoding them, so text stays selectable and images stay at full resolution. The one honest trade-off is that heavy work uses your device's processor rather than a server's — rendering a very large PDF is slower on an old phone. We think that is the right trade, and we would rather state it plainly than pretend it away.

The tools we deliberately don't offer

You will not find PDF-to-Word or Word-to-PDF here, even though they are among the most searched PDF tasks. We leave them out because they cannot be done well in a browser, and a conversion that quietly mangles your document is worse than none. A PDF stores positioned glyphs, not paragraphs and tables, so rebuilding an editable document from one is guesswork that even Adobe gets wrong on its own format. We would rather offer fewer tools that genuinely work than pad the list with ones that disappoint.

Where we are

The site is built and released in stages, one segment at a time, so that each tool is properly tested before the next arrives. If a tool ever behaves unexpectedly, tell us — the contact page has the details.