ChuyenPDF

ChuyenPDF is a free PDF toolkit built for Vietnamese users. It offers 21 online PDF tools covering conversion, merging, splitting, compression and OCR, all in a Vietnamese interface.

Most of the tools run directly in the browser. The file is processed on the user’s own device and is never uploaded to a server. OCR is the exception: the image is sent over an encrypted connection, is not stored on the server, and the result stays in a temporary cache that expires after at most five minutes. In a rare case, when the classification result is not confident enough and the user is signed in, the file may be sent to a third-party AI service over an encrypted connection and is deleted right after processing.

The interface is entirely in Vietnamese, including OCR output with Vietnamese diacritics. No software installation and no account are required for the standard tools.

ChuyenPDF also publishes llms.txt and llms-full.txt, and exposes a .md version of every tool page and information page at the same URL, so AI agents can read the content directly.