Base64 to PPTX Converter
Paste the Base64 and get the presentation back. Slides, notes, embedded fonts and media are restored exactly — the bytes are not rewritten — so anything that opened the original file opens this one.
Processed as you paste — no button to press (Ctrl+Enter converts now / Esc clears)
Drop a file here, or — Ctrl+V a screenshot works too
Any file type · 100 MB maximum
Paste, drag and drop, or Ctrl+V a screenshot
Where Base64 presentations come from
- Deck-generation APIs — services that build a deck from a template and return it as a string
- Collaboration tools — exports passed between automation steps
- Backups — presentations stored as text in a database column
How a .pptx is recognized
The presentation is a ZIP archive: the decoded bytes start with PK and contain a ppt/ directory, which is what distinguishes it from a .docx (word/) or .xlsx (xl/) built the same way.
Legacy .ppt files
PowerPoint 97-2003 used a binary format starting with D0 CF 11 E0. Those are restored as a generic compound document with a .ppt extension — the container is preserved, PowerPoint handles the rest.
Frequently asked questions
Can it convert the deck to PDF or images?
No, the tool restores the original file rather than exporting from it. Open the restored deck in PowerPoint, LibreOffice or Keynote to export in another format.
Will WPS Presentation open the result?
Yes. WPS handles standard Office Open XML, and the file is byte-identical to the original.