Geyi — AI Document & PDF Translator

Reading foreign-language papers, translating a whole book, turning a paper into a deck: the time goes into formatting, layout and moving files around, not into the translation itself. Geyi is an AI document translator that takes that part over — upload a whole PDF, Word file or EPUB, let it run, and get back a translation whose layout still matches the original, with a paragraph-by-paragraph bilingual copy if you want one.

Upload a file to start translating

Translate files and text, convert formats, turn papers into slides, extract text, or translate PDFs with Zotero.

Read foreign-language papers, translate books, convert documents, or turn a paper into a presentation.

Geyi is an AI document translation platform: upload a whole document, let it run in the background, and get back a file whose layout matches the original. It also translates text, converts formats, turns papers into slides, extracts text and translates PDFs with Zotero.

Key capabilities

File translation for 25 upload formats, exporting Word, PDF, Markdown or EPUB
Layout-preserving PDF, or AI reflow for scans and complex layouts
Optional bilingual PDF and Word with original and translation interleaved
Around 30 languages, with the source language detected automatically
Paper to editable PPTX, format conversion and document extraction
Billed in credits, with the estimate shown before you submit

What Geyi does

Translate files and text, convert formats, turn papers into slides, extract text, or translate PDFs with Zotero.

File translation: upload a whole document; the translation keeps the original layout or is reflowed by AI, and exports to Word, PDF, Markdown or EPUB.
Text translation: instant translation for paragraphs and abstracts, with terminology kept consistent across a session.
Format conversion: the common pairings between PDF, Word, EPUB, PPT and Markdown.
Presentation generation: turn a paper into an editable PPTX — outline first, then slide by slide.
Document extraction: pull text out of scans, photos and vertically typeset pages and reflow it into editable horizontal text.

Which file formats are supported

File translation accepts 25 formats: PDF, DOC, DOCX, ODT, RTF, XLS, XLSX, XLTX, XLSM, ODS, PPT, PPTX, ODP, HTML, EPUB, MD, TXT, CSV, XML, SRT, PNG, JPEG, WEBP, GIF and TIFF. Translations export to Word, PDF, Markdown or EPUB, and a bilingual PDF and Word pair — original and translation interleaved paragraph by paragraph — can be produced alongside them.

Which languages are supported

Around 30 languages, grouped by region. Simplified Chinese, Traditional Chinese and English are pinned to the top; Asia covers Japanese, Korean, Vietnamese, Thai, Indonesian, Hindi and more; the Middle East covers Arabic, Hebrew, Persian and Turkish; Europe covers German, French, Spanish, Italian, Portuguese, Russian and others; Swahili is also available. The source language can be detected automatically.

Why teams pick Geyi

Three things decide whether a long document is still usable once it has been translated: it has to finish, it has to be read correctly, and it has to come back as a file you can work with.

Fast: upload a whole PDF in one click and the job runs the entire book in the background — no waiting for a chatbot to emit one sentence at a time, no endless copy-pasting.
Accurate: blurry scans, two- and multi-column layouts and vertical text are all handled; text recognition feeds large-model translation, so meaning is read in context and omissions and broken sentences are rarer.
Practical: formats convert freely, the original layout can be preserved, and bilingual reading is there when you want it.

What the finished translation looks like

The output is a file you can edit and cite, not a block of text you have to copy out by hand.

Multi-format export: export to Word, PDF, Markdown or EPUB, or take the whole bundle away with its glossary.
Layout that follows the source: layout-preserving mode keeps the original PDF pagination and the position of figures and tables; AI reflow rebuilds the page with even fonts and paragraphs, well-spaced chapters and legible formulas and notes.
Paragraph-level source locating: every translated paragraph carries the page number it came from, so bilingual reading and citation checks take a second.

How billing works

Geyi bills in credits, and the rate follows the file type and the precision you pick. On high precision, PDFs and images through AI reflow and Word, EPUB and text formats are all 8 credits a page, while layout-preserving PDF is 4 credits a page. On standard precision, PDFs and images through AI reflow are 4 credits a page, while Word, EPUB, text formats and layout-preserving PDF are 2 credits a page. Every file bills at least 10 credits.

The estimated cost for your file is shown before you submit, not after the job runs. The full price list is on the pricing page and needs no account to read.

Geyi compared with generic machine translation and a manual workflow

Aspect	Geyi	Generic machine translation	Manual workflow
Formulas and layout	PDFs can keep their layout, with the original pagination and formulas and figures left in place; or use AI reflow, which re-typesets in reading order and keeps formulas intact	Often outputs plain text or simplified formatting; formulas and tables can shift, and the layout often needs fixing by hand	Copied text often has broken lines and the wrong order; formulas, tables and captions are rebuilt one by one
Scanned documents (OCR)	Scanned PDFs and PNG, JPEG, WEBP, GIF and TIFF images are recognised first, then translated; multi-column pages follow reading order and vertical text becomes horizontal	Whether scans and images can be read varies by tool; the text often has to be recognised separately first	Run a separate OCR tool, proofread each page, then translate
Long documents	Upload the whole file once; it is processed in segments in the background and keeps running if you close the page; the file size limit depends on your plan	Often limits text length or file size per request, so long documents tend to be split into batches	Copy and paste section by section; the longer the document, the more time it takes and the harder terms are to keep consistent
Zotero	Right-click an item in Zotero 7 through 9 to translate it; the translated PDF is attached to the same entry; the plugin needs a Research plan or above	Usually not connected to Zotero; files are exported, translated and imported back	Export the PDF, translate it, then attach the result to the item by hand
Right-to-left languages (RTL)	Arabic, Hebrew and Persian are available as target languages; right-to-left layout is applied to PDF output only, where the direction of digits and Latin text is still being improved, so preview before use; Word, EPUB and other formats do not yet set right-to-left paragraphs	The text can be translated, but right-to-left layout and embedded digits or Latin text often need manual adjustment	Re-typeset in software that supports right-to-left layout and check text direction throughout
Billing	Credits per page, with free credits on sign-up; the estimated charge is shown before you submit, and the final charge follows the parsed page count	Usually billed by characters or by subscription; rules vary by tool	The main cost is working time, which grows with length

The generic machine translation and manual workflow columns describe common cases; actual results vary by tool and method. The Geyi column lists only capabilities that are live in the product today.

Three steps to get started

Upload your document PDF, Word, DOCX, EPUB — 25 formats in total, including scans and images. Upload a whole book at once.
Pick your settings and run Choose the target language and the output layout — layout-preserving or AI reflow. Jobs run in the background, so you don't have to watch the page.
Download the result Export to Word, PDF, Markdown or EPUB, with bilingual text and source page references preserved.

Frequently asked questions

Can I use Geyi without an account?

Pricing, features and help pages are all readable without signing in. Submitting a translation needs an account; signing up comes with 300 credits and a one-day trial of the Research tier.

What can Geyi do besides translation?

Translate files and text, convert formats, turn papers into slides, extract text, or translate PDFs with Zotero.

Will the layout survive translation?

Layout-preserving mode keeps the original PDF pagination and replaces the text layer in place, so page breaks, tables and figures stay where they were. AI reflow rebuilds the document instead, which suits scans, images and messily formatted sources.

Can scans and images be translated?

Yes. Scans, photos and old vertically typeset pages go through AI reflow, which recognises the text before translating it. Vertical Japanese is converted to horizontal output and multi-column pages come back in reading order.

Do I have to keep the page open for a long document?

No. Jobs run in the background once submitted, so you can close the page and collect the result from History.

What happens to the files I upload?

The privacy policy states what is collected, how long it is kept, who can reach it, and the retention period for jobs and their outputs. Access, correction and deletion requests go to support@geyi.net and are answered within 30 days.

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