Convert PPT to JPG
Two things make this different from exporting a modern deck. A JPG holds one image, so only the first slide comes out. And a legacy deck was laid out around fonts that may no longer exist, so what gets rendered is not necessarily what the author saw — and unlike an editable format, an image gives you no way to fix it afterwards.
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What it does
- The first slide is rendered and encoded as a JPG
- Missing fonts are substituted, which can change the layout permanently
- For every slide, convert to PDF instead
How to use PPT to JPG
- 1
Upload the .ppt
Move the slide you want to the front first, since only the first is exported.
- 2
The slide is rendered
Shapes, text and images are drawn into a pixel grid using whichever fonts are available.
- 3
Compare it against the deck
If the original font is missing the composition will differ, and an image cannot be corrected. This is the check that matters for legacy files.
How it works
The binary deck is opened and its first slide is rendered: shapes drawn, text laid out with whatever fonts the system has, images composited into a pixel grid at the slide's own dimensions. That grid is encoded as a JPG.
Old decks are usually 4:3, so expect a 4:3 image rather than the widescreen shape a modern deck produces.
The font problem, which is specific to legacy decks
This is the part worth reading before converting anything important. A .ppt records which typeface each text box uses; it does not usually contain the typeface. Twenty years on, that font is frequently not installed anywhere.
The renderer substitutes. A substitute has different letter widths, so lines wrap in different places, and text laid out to sit exactly beside a logo can end up on top of it.
In an editable format you would see this and nudge the box. In a JPG the mistake is permanent, which is why converting to PPTX or PDF first and looking at the result is worth the extra step for anything that will be published.
The one-image rule
A JPG contains one image, so the first slide is what you get and nothing warns you about the rest. For the whole deck, PDF paginates and keeps the text real.
JPG against PNG
JPG's compression targets photographs. On flat slide content it leaves visible haloes around letters and edges. Choose it when the slide is a photograph; choose PNG otherwise, where it is lossless and for this kind of content often no larger.
Old decks reflow when their fonts are gone
A .ppt from the 1990s or 2000s was built with the fonts on that machine, and it
records the names rather than the fonts themselves. Twenty years later those fonts
are frequently not installed anywhere, so the renderer substitutes.
Substitutes have different widths, and the layout was tuned to the original. Titles wrap, bullets overflow the slide, a caption slides under the picture it belonged to. Nothing errors; it just comes out wrong.
That is why the advice on this page is to look at the image rather than trusting it. If the layout has shifted, opening the deck in LibreOffice and adjusting before exporting is the only real fix — the information the renderer needed is not in the file.
Examples
A title slide from an archived deck
The old deck was 4:3, so the image is 4:3. It works as a thumbnail for an archive listing, which is the usual reason anyone wants a picture of a deck this old.
A slide whose font no longer exists
The substituted font is wider, so a line wrapped and pushed into the graphic. In an editable format this is a five-second fix; in a JPG it is permanent.
Frequently asked questions
Why does the image not match the original deck?
Because the fonts are gone. A deck from the late 1990s or early 2000s was composed around typefaces installed on that machine, and if one is missing now a substitute with different letter widths is used. Lines wrap differently and text can overlap other elements. Converting to PPTX or PDF first lets you see and fix the problem before it is baked into pixels.
Should I choose JPG or PNG?
PNG unless the slide is mostly a photograph. A slide is normally flat color, hard edges and text, which is what lossy compression damages most visibly — haloes appear around lettering and along thin rules. JPG earns its place on a full-bleed image slide, where its compression works as designed and the file is meaningfully smaller.
Can I export every slide as an image?
Not into one file. A JPG holds a single image, so a converter has to pick, and the first slide is what people usually mean. Converting to PDF gives you every slide, paginated, with the text still selectable, and any PDF tool can then export individual pages as images if that is what you need.