FastHan / PDF Tools / Translate PDF Online Free
TRANSLATE PDF
Translate PDF Online Free
Translate a PDF between English and Indonesian in your browser. Text only — the layout is rebuilt and images are not kept. The translation model downloads about 100 MB on first use.
100% private — processed in your browser
Your files are processed locally in your browser with JavaScript. They are never uploaded to a server. You can verify this yourself: open your browser DevTools, go to the Network tab, and watch — no file data leaves your device.
How to translate a PDF
Most PDF translators upload your document to a server. This tool translates in your browser with a real translation model — MarianMT OPUS-MT (Apache-2.0) running through Transformers.js. English to Indonesian uses one model, Indonesian to English uses another; each downloads about 100 MB on first use, then it is cached in your browser.
The tool reads the text layer of each page, translates it sentence by sentence, and rebuilds a new PDF with the translated text. One original page becomes one translated page (longer translations can flow onto extra pages).
Two honest limits. First, this is text only: the layout is rebuilt from the text, so tables, fonts, and images do not survive — for a document that must look exactly like the original, keep the PDF. Second, translation quality varies by sentence: the model is good on plain, everyday language and weaker on jargon, names, and legal text. A scanned PDF has no text layer at all, so there is nothing to translate — use OCR PDF first to read the text, then translate it.
How to use this tool
- 1Drop PDF files onto the page (up to 20 at once) and pick a direction: English to Indonesian, or Indonesian to English.
- 2Press Translate PDF. On first use the model downloads about 100 MB — after that it is cached.
- 3Download each translated PDF, or all of them as one ZIP.
Frequently asked questions
Will the translated PDF look like the original?
No. The tool rebuilds the PDF from the translated text: paragraphs come through in order, but tables, fonts, and images are not kept, and page breaks land in different places. For reading the translation it is a proper PDF; for a document that must look identical, keep the original.
Why does it download about 100 MB the first time?
The translation model itself is about 100 MB per direction. It downloads once from Hugging Face, is cached in your browser, and later translations reuse it without downloading again. Your PDF files are never uploaded anywhere.
How good is the translation?
Good on plain, everyday language; weaker on jargon, proper names, and legal or technical text. Machine translation can get a sentence wrong, so read important documents carefully before relying on them.
Can it translate a scanned PDF?
No — a scanned PDF has no text layer, so there is nothing to translate. Use OCR PDF first to read the text from the scan, then translate the result.
Is my PDF uploaded anywhere?
No. The file is read and translated in your browser tab. Only the translation model is downloaded (from Hugging Face, on first use). Your document never leaves your device.