Free private local Spanish to English PDF translator

A Spanish to English PDF translator extracts text glyphs from your Spanish document, translates them into English using local AI, and renders the translated text directly back into the original layout. Everything runs in your browser without uploading the file.

Drop your file into the tool above. The language selector is already locked to Spanish → English. The document is read with pdf.js, grouped into complete paragraphs, and translated by on-device models. No server requests carry your content.

English is usually the most compact of the Western languages, so a translation into it tends to leave whitespace rather than overflow. The on-page reader scales font sizes proportionally within original bounding boxes to keep the translated English layout faithful without text clipping.

Official Spanish-language documents — contracts, certificates, government forms — are commonly distributed as PDFs with a proper text layer, which is exactly the case this tool handles well. Clean digital exports from word processors or desktop publishers produce high-accuracy results. Scanned pages are automatically detected and processed via on-device OCR.

The translation model runs directly on your machine via WebAssembly or Chromium's built-in translator. Once cached, you can translate Spanish documents to English with no internet connection.

The reader provides three views: Side by side pairs every translated paragraph next to its Spanish original with synchronous cursor highlighting; On the page overlays the translation with instant hover peek to reveal original text; and Translation provides clean reading text.

Yes. Client contracts, medical documents, research papers and internal reports never leave your computer. You can monitor your browser DevTools Network tab during translation to confirm zero file uploads.