Open an OFD file as a PDF

OFD is China's national document format, used for e-invoices, e-tickets and official documents. This converts it to a PDF you can open anywhere — as a high-resolution image PDF, because this build does not preserve OFD vectors.

Fixed DPI 300 DPI default Text not selectable

Image PDF, stated plainly

Each OFD page is rendered to a 300 DPI image inside a PDF page. Layout, stamps and seals look exactly right; the text underneath is pixels, so it cannot be selected, searched or edited, and the file is larger than the original. Keep the OFD if you need a vector source.

What OFD is, and why it rarely converts cleanly

OFD (Open Fixed-layout Document, GB/T 33190) was created as a domestic alternative to PDF: a ZIP container of XML page descriptions, fonts and images. It is mandatory infrastructure for Chinese e-invoices, and it is excellent at exactly one thing — guaranteeing that a document looks identical everywhere it is opened, seals included.

That design is also why conversion is awkward outside China. Fewer libraries implement it, the specification has national extensions, and seals are often drawn as embedded images or proprietary objects rather than standard vector paths. Rendering the page and wrapping the result in a PDF guarantees the appearance — which is what an invoice is for — at the cost of the text layer.

When to convert, and when not to

Convert: sending an invoice to a foreign accountant, opening it on a Mac or phone without an OFD viewer, printing it, attaching it to an email.
Keep the OFD: reimbursement and tax filing, where the original format is usually required, and any workflow that needs a valid electronic seal.
Do not convert for editing: an image PDF cannot be edited, and the OFD was never meant to be edited either.

How to convert

Add the OFDOne file at a time; password-protected or non-standard OFDs are reported as such rather than half-converted.
Pick a render resolution300 DPI matches print; 600 DPI is for archival or for seals that will be inspected closely.
ExportThe result is a PDF with one image per page. Compare it against the original before sending it on.

Item	Behaviour
Input	.ofd (GB/T 33190), one file
Output	Image PDF at 150 / 300 / 600 DPI
Text layer	None — not selectable, not searchable
Seals and stamps	Rendered as part of the page image
File size	Larger than the source, especially at 600 DPI

FAQ

Can I edit the text afterwards?

No. The text is an image. Editing would require OCR plus a rebuild, and any official document with a seal should not be edited anyway.

Will the tax office accept the PDF instead of the OFD?

Usually not for reimbursement or filing — those processes expect the original OFD with its electronic signature. Use the PDF for reading, printing and sharing, and keep the OFD for the paperwork.

Why is the PDF so much bigger?

Because a page of text that was a few kilobytes of XML becomes a 2480 × 3508 pixel image. At 300 DPI an invoice is typically 0.5–1.5 MB; at 600 DPI, four times that.