PDF translation

PDFs are the hardest kind of file to translate, and the difficulty is not the language — it is the page. Columns, footnotes, tables, formulas and captions each sit somewhere specific, and if any step reads the order wrong, the translation comes back scrambled. Geyi joins parsing, translation and layout rebuilding into one pass: you upload a whole PDF and get back something you can use as is.

There are two routes through a PDF, and which one fits depends on the original. Digital PDFs with an intact text layer can go through layout-preserving mode, which replaces text page by page without touching the design. Scans, photographs and messily typeset files go through AI reflow, which recognises the text first and lays it out again.

Choosing between the two routes

There is one test: can you select the text with your mouse in a PDF reader? If you can, there is a text layer, layout-preserving works, the translation matches the original page for page, figures and formulas stay put, and it costs fewer credits. If you cannot, the page is essentially an image and has to be recognised first — that is AI reflow.

One more case: the text layer exists but the layout itself is a mess, which is common in old archives that were scanned and then OCR'd. AI reflow usually reads better there, because it rebuilds the reading order rather than following a layout that was already wrong.

What you get back

Layout-preserving: still a PDF, with pagination, table positions and image positions matching the original.
AI reflow: export Word, PDF, Markdown or EPUB, whichever suits what you do next.
Bilingual output (optional): an extra PDF and Word pair with original and translation interleaved paragraph by paragraph, so proofreading needs only one window.
Each translated paragraph is tagged with the page it came from, so citations trace straight back to the source.

Which precision to pick

High precision adds an AI polishing and drift-checking pass: after the first translation it reworks wording and sentence order paragraph by paragraph and verifies nothing has drifted from the original meaning. It suits publishing, academic work and formal delivery. Standard runs in one pass — faster and cheaper, and fine for skim-reading, drafts and bulk work.

Both tiers handle layout identically; the difference is only how far the prose itself is polished.

The two PDF modes

	Layout-preserving	AI reflow
Suits which originals	Digital PDFs whose text can be selected; cleanly typeset papers and publications	Scans, photos, messy layouts, or PDFs that need a different output format
What the translation looks like	Original pagination, text layer replaced in place	Rebuilt layout, reading order restored
Export formats	PDF	Word, PDF, Markdown, EPUB
Credits per page, high precision	4 credits/page	8 credits/page
Credits per page, standard	2 credits/page	4 credits/page

Translating a PDF in four steps

Upload Drop the whole PDF onto the file translation page — no splitting pages, no pasting paragraphs. The per-file size cap depends on your plan.
Pick the modes Choose a layout mode (preserving or reflow) and a precision tier (high or standard), and tick bilingual output if you want a side-by-side version.
Check the cost The estimated credits for your file appear before you submit. Billing is per page, with a 10-credit minimum per file.
Collect the result The job runs in the background, so you can close the page. When it finishes, preview it online or download your chosen format from History.

Frequently asked questions

What does a 100-page PDF cost?

It depends on mode and precision. Layout-preserving on high precision is 4 credits a page, so about 400 for 100 pages; AI reflow on high precision is 8 a page, about 800. Standard is half of each. The exact estimate for your file is shown before you submit.

Can scanned PDFs be translated?

Yes. Scans have no text layer, so they go through AI reflow, which recognises the characters before translating. Clean print scanned straight gives the best results; where the image is blurry or largely handwritten, check against the original before exporting.

Is the result still a PDF?

In layout-preserving mode, yes, and it matches the original layout. In AI reflow mode you can export Word, PDF, Markdown or EPUB, whichever fits what you do next.

Do formulas and tables survive?

In layout-preserving mode formulas, figures, headers and footers stay exactly where they were, because only the text layer is replaced. AI reflow rebuilds the layout and places figures according to the restored reading order.

Why is layout-preserving PDF-only?

It replaces text inside the original PDF and reuses its pagination, so both input and output have to be PDF. Use AI reflow when the original is another format or you need a different output.

Can I translate only some pages?

Jobs are submitted per file and billed on the actual page count. If you need only part of a document, export those pages into a new PDF first and upload that — the charge drops accordingly.

Do I have to wait for a large file?

No. Jobs run in the background once submitted, so you can close the page and collect the result from History. How many files run at once depends on your plan.

Can I pin specialist terms?

Yes. The personal glossary in your account is applied automatically and takes effect on the next file as soon as you edit it.

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Geyi is a proprietary AI document platform owned and operated by Nayuta Technology and Culture Company Limited.