The Leningrad Codex (1008 AD), the oldest complete manuscript of the Hebrew Bible, is available in PDF at the Internet Archive.
Several modern projects offer "original order" or uncopyrighted versions for free public use: The Great Bible 1540 – Original PDF
As the first authorized edition of the Bible in English, high-quality PDF downloads are available at Original Bibles . Modern Literal and Public Domain Versions original bible pdf free download
If you are looking for early English versions often regarded as "original" milestones in translation history:
Another vital early complete copy of the Bible in Greek is available as a PDF scan via Internet Archive. The Leningrad Codex (1008 AD), the oldest complete
Locating an "original Bible " for free download in PDF format depends on whether you are searching for the earliest surviving manuscripts, historic translations, or modern literal versions.
While mostly fragments, the Leon Levy Dead Sea Scrolls Digital Library provides free digital access to these ancient biblical scrolls. Historic and Authentic English Translations (PDF) Locating an "original Bible " for free download
While the original autographs (the first physical documents written by the authors) no longer exist, several high-quality digital archives and organizations provide access to the oldest surviving manuscripts and landmark translations for free. Where to Download Original Manuscripts and Ancient Texts