About SailPDF

Why browser-first

Every tool that can run on your device does. Merging, splitting, rotating, cropping, compressing and converting images all happen inside the browser tab: the file is read, changed and downloaded without ever being sent anywhere.

This is not a marketing position. It is why the tools have no upload limit, no queue, and no account: there is no server to pay for, and nothing to store.

What that costs

Two things. First, formats that need a full office engine — Word, Excel, PowerPoint — cannot run in a browser reasonably, so those tools are server-side and say so on the page.

Second, browser memory is the limit. A 400 MB merge will not work on a phone, and the tool tells you that instead of failing silently.

How it is funded

Display advertising. No subscription, no watermark, no export limit. Two pages — Protect and Unlock — carry no ads at all, because the browser isolation their encryption needs would block third-party scripts anyway.

Contact

Write to hello@sailpdf.com. Bug reports and corrections are welcome, especially about a file that did not convert correctly.