We build free online PDF tools that are private by design.
PDF software should be simple, fast and free. We built PDF4Tools because complex, bloated PDF suites are overkill for everyday tasks like splitting pages, merging scans or signing a document.
Every tool runs entirely in your browser using client-side JavaScript. When you upload a file, it is processed locally on your computer — never uploaded to our servers, never stored, never shared. Disconnect from the internet after the page loads and the tools still work.
All PDF tools on this site are 100% free with no limits, no watermark and no account required. No trials, no paywalls — just tools that work.
PDF4Tools is powered by proven open-source libraries such as pdf.js and pdf-lib, which run locally in your browser. This keeps every conversion accurate and every page pixel-perfect.
Whether you need to split an A3 exam into A4 pages, merge double-sided scans, compress large documents or fill in a form, PDF4Tools gives you a private, instant and completely free online PDF tool — no installs, no queues, no watermark.