Luoyin Software Studio

The most tedious office jobs, each with a program of its own

Seals on PDF and Word documents: that is Luoyin. PDFs back into Word and Excel files you can edit: that is Tuowen. Our apps run on your own computer, upload nothing and work offline. Windows and macOS.

Our apps have a Chinese interface for now and are built around Chinese business documents.

Luoyin: a seal on the last page and a cross-page seal along every page

LuoyinSeals on PDF and Word documents, in one step

Add authorised seal images, with cross-page and batch processing
Type 「甲方（盖章）」 and it finds the signature block, on scans too
Export paper-scan-style PDF copies
Save the setup and process dozens of contracts at once

About Luoyin Download

The free edition seals and exports without limits or watermarks · Pro from ¥99 a year

Tuowen: a Word file converted from PDF, with real headings and paragraphs

TuowenPDFs back into Word and Excel files you can work with

Real headings, paragraphs and tables come out, not a pile of text boxes
Tables across pages become one; bills of quantities become Excel that calculates
Scans recognised offline, uncertain characters highlighted so you know what to check
Formulas in technical scans become editable Word equations

About Tuowen Try it

Every feature for 7 days of use after installing · Standard from ¥399 a year

Your files stay on your computer

Our apps do all their work locally. Contracts, tenders, seal images and design documents never pass through a server.

License keys checked offline

No account, no sign-in. A Luoyin key is simply entered again on a new computer; a Tuowen key belongs to one computer and is moved on the order page.

Talk to the people who wrote it

A file that converts badly, an error, a feature you need: say so on the feedback page or write to gouqingyu@163.com. The reply comes from the developer.