PowerPoint translation guide · Updated August 2026
DeepL PowerPoint file-size limits: a large-PPTX alternative
DeepL PPTX limits range from 5 MB to 100 MB by plan. Slidelang accepts PowerPoint files up to 250 MB and publishes a downloadable 133 MB proof case.
Short answer
DeepL’s current table lists PowerPoint limits from 5 MB for an account without a subscription to 10, 20, 30 or 100 MB depending on plan. Slidelang’s upload cap is 250 MB. It is not unlimited, but it covers the published DeepL range and has a public 133 MB, 307-slide translation you can inspect.
01 · In this guide
Do not split the deck before checking the alternative
Splitting a presentation creates duplicated masters, broken internal links and a manual merge step. First compare the original file size against the documented service limit. If it fits under 250 MB, Slidelang can quote and process the original PPTX as one deck.
02 · Recommended workflow
Recommended workflow
- Keep an untouched copy of the original PPTX.
- Upload the original file; do not convert it to PDF.
- Start with text-only translation for the lowest-cost structural test.
- Download and inspect the editable output before enabling visual translation.
03 · Verified limits and evidence
Inspect the real file
Vendor documentation checked 11 August 2026. Product limits can change; follow the source links for the latest values.
Official sources: DeepL file formats · DeepL image translation · Microsoft Copilot translation · OpenAI file uploads
04 · FAQ
What can I use when a PowerPoint is too large for DeepL?
For PPTX files between the applicable DeepL limit and 250 MB, Slidelang can process the original deck without splitting it. Its public proof includes a 133 MB, 307-slide file.
05 · Related guides