Compare a translated PDF with the original
Open both files to inspect matching pages and review names, numbers and meaning. Record notes or download the selected pages side by side as an image-only PDF. Review is manual and runs in your browser.
Free local reading tool
Read an original PDF beside its translation
Choose two PDFs from any source and view one page from each: side by side on wider screens, stacked on smaller screens. Pick page numbers independently when the translation covers only selected pages or has a different page order. Find terms or numbers in extractable text on the selected pages, then review tables and meaning yourself.
Review notes
Record what you need to check, such as an equation, unit or table cell. Each note records the page numbers shown when you add it.
Notes stay in this page’s memory. Download a copy before leaving or reloading, which clears them. If you change PDFs, check which files earlier notes refer to.
Open both PDFs to add notes with page numbers.
Your selected PDFs stay in this browser for this review. Up to 50 MiB and 300 pages per file. This visual reader does not upload, translate, automatically match pages or detect errors. Page positions can differ; choose the corresponding pages yourself. It does not establish translation accuracy or certification. Interaction analytics follow your privacy settings.
Need a translation first? Choose a PDF to translate. Translation uploads the file and shows the available trial and credits before starting.
How to review your translation
- Choose the original PDF and translated PDF. Each file can be up to 50 MiB and 300 pages.
- Select page numbers independently if the translated file covers only part of the source.
- Check names, negations, values, units and table cells. Keep the original as your reference.
The reader does not translate, detect differences automatically or certify a translation. Password-protected or damaged PDFs may not open. Selected files are not uploaded for comparison; site assets and usage analytics may use the network.
Try a real example
This fictional technical datasheet was translated from English into Spanish. The historical result has not been independently reviewed and includes a typo and a changed brand name. Use it for practice, not technical decisions.
Download English originalDownload Spanish result
Need a translation first? Open the PDF translator. That separate workflow uploads your file and shows the available trial or credit estimate.