For developers and technical users, SimpleLocalize’s command-line interface can process massive PDFs. It isn't "pretty," but it is the most efficient for bulk translation of huge technical manuals.
Upload your PDF to Drive, open it as a Doc, and use "Translate Document." This bypasses standard file size limits and is completely free. pdf translator 100mb
Medical journals (e.g., The Lancet) and legal contracts often run 100+ pages with embedded high-resolution scans. A single clause translated wrong can cost millions. These users need a secure, offline, or enterprise-level 100MB translator. For developers and technical users
For a free 100 MB PDF translator , go with DocTranslator . For the best quality with no file size worry, get DeepL Pro . open it as a Doc