AI Translation
Translate PDF in 100 Languages
Extract text coordinates locally, translate strings at the edge, and rebuild the document in your browser.
100 target languages
Choose output language
Default is Chinese. The PDF file stays in your browser; only extracted text fragments are sent for AI translation.
This keeps page geometry by masking original text and redrawing translated text in place. True content-stream text deletion and perfect background restoration require a full PDF operator parser/PAdES-grade rendering engine.
Output downloads automatically as a translated PDF.
User guide
How to use AI Translate PDF
Extract positioned text, translate batches through a configured AI Worker, and overlay translated text locally.
- 1
Upload a text-based PDF and choose source and target languages.
- 2
Extract text fragments and review the detected reading order.
- 3
Send text batches to the translation endpoint.
- 4
Generate the translated overlay PDF and inspect every page.
Best for
- Reading foreign reports
- Creating review copies with translated overlays
Important limitation
Exact layout preservation and deletion of original text are not guaranteed; translation is AI-generated and sensitive text leaves the browser as plain text.
Frequently asked questions
Can it translate 100 languages?
Language coverage depends on the configured model; quality varies by language pair.
Is the original PDF uploaded?
No. Only extracted text is sent to the Worker.
PDFPerch processes files locally unless this guide explicitly identifies a cloud-dependent feature. Always keep an original copy and verify critical output before submission, printing, signing, or accounting use.