Free online presentation tools
PPTX conversion, slide image extraction, speaker notes tools, and presentation utilities.
Four tools for people who need to read, write or show a deck without installing PowerPoint or Keynote. PPTX Viewer opens an Office Open XML file entirely inside the page: JSZip unpacks the .pptx archive in this tab, the viewer reads ppt/slides/slide1.xml onward, pulls every a:t text run out of each slide in document order, and looks up the matching ppt/notesSlides entry so presenter notes come across too. You get a slide list with thumbnails, keyboard navigation, zoom, a fullscreen mode and the file metadata. What you do not get is a pixel-perfect render — shapes, photos, charts, SmartArt, theme fonts and animations are not drawn, because that would mean reimplementing the Office rendering engine. It answers what does this deck say, not what does it look like, which is exactly what you want when someone mails you a 40-slide file and you need the content. Slides from Markdown goes the other way: type or paste Markdown, split slides on a line of three dashes, use a single hash for a title, double hash for a section, dashes for bullets, backticks for inline code and fenced blocks for longer snippets, and a line beginning with a right-angle bracket and the word note for presenter notes. Six themes are included — Dark, Light, Ocean, Forest, Warm and Minimal — and the output downloads as one self-contained HTML file you can open anywhere, or back as .md. Everything rendered is run through DOMPurify first, so pasted Markdown cannot inject script into the preview. Slides Viewer is the presenting half on its own: paste content, split on the same three-dash separator, and you get fullscreen playback with a speaker timer, thumbnail strip, zoom and keyboard control. Pitch Deck Templates supplies the structure rather than the design — a classic startup fundraising deck with title, problem, solution, market size, business model, traction, competition, team and the ask, plus sales-deck and project-update variants — each section prompting for the specific fields it needs, exportable as HTML or Markdown. Nothing here uploads a file, calls an API or needs an account.
4 tools · always free · no account needed
PPTX Viewer
View PowerPoint files without Office installed
Slides from Markdown
Write Markdown and present as slides with export
Pitch Deck Templates
Fill-in-the-blank pitch deck and presentation templates
Slides Viewer
Present slides fullscreen with keyboard navigation
How to choose the right tool
Match the tool to the direction you are travelling. Someone sent you a deck and you cannot open it: PPTX Viewer, accepting that you will read the words rather than see the design. You need to build a deck and you would rather write than drag boxes: Slides from Markdown, which gives you version-controllable plain text and a single HTML file at the end. You already have slide content and only need to stand up and present it: Slides Viewer, which adds the speaker timer and fullscreen the writing tool does not focus on. You know you need a deck but not what goes on each slide: Pitch Deck Templates, which asks the questions an investor or a steering committee will ask and leaves you with an outline you can then take into Slides from Markdown or PowerPoint. One gap to name plainly: there is no PowerPoint-to-PDF converter in this hub. If you need a PDF, export the HTML from Slides from Markdown and print it to PDF from your browser, or use PDF to PowerPoint in the PDF hub for the opposite conversion.
Frequently asked questions
Does the PPTX viewer need PowerPoint or Office installed?
No. A .pptx file is a ZIP archive of XML parts, and the viewer treats it as exactly that. JSZip unpacks the archive in your browser, the tool reads each ppt/slides/slideN.xml entry and extracts the text runs, then checks ppt/notesSlides for the matching notes. All of that is JavaScript running in the tab, so it works on a Chromebook, a locked-down work laptop, a phone or a Linux box with no Office licence anywhere in sight. The file never leaves the device and no server is involved at any point.
Why do the slides look like text instead of the real design?
Because the viewer extracts content rather than rendering layout. Faithfully drawing a PowerPoint slide means resolving slide layouts and masters, theme colour and font schemes, embedded media, chart definitions, SmartArt, tables, transforms and animation timings — effectively reimplementing the Office renderer in the browser. This tool deliberately stops at the text: titles, body copy in document order, and presenter notes. That covers reading, searching, quoting and copying content out of a deck. For visual fidelity you need PowerPoint, Keynote, LibreOffice Impress or Google Slides.
Can it open .ppt, .odp or Keynote files?
Only .pptx. The file picker accepts that extension alone, and for a good reason: .pptx is Office Open XML, a ZIP of readable XML parts. The legacy .ppt format is a binary compound-document structure that needs a completely different parser, .odp is OpenDocument with its own schema, and .key is Apple's proprietary bundle. If you have one of those, re-save or export it as .pptx from whatever application created it, then open the result here. Most modern applications offer that export.
What Markdown syntax do the slide tools understand?
A line containing only three dashes starts a new slide. A single hash is the slide title and renders large; a double hash is a section heading. A leading dash makes a bullet. Double asterisks give bold, single asterisks italic, backticks inline code and triple backticks a code block. A line starting with a right-angle bracket followed by note colon becomes a presenter note rather than visible slide content. That is the full set — it is a focused subset chosen so that a deck stays readable as plain text, not a general Markdown implementation.
How do I get a PDF or a .pptx file out of these tools?
Slides from Markdown and Pitch Deck Templates both download a single self-contained HTML file, and Pitch Deck Templates also exports Markdown. For a PDF, open that HTML file and use your browser's own print-to-PDF, which keeps the theme and pagination. Neither tool writes a .pptx binary, so if you need a genuine PowerPoint file, paste the exported Markdown or HTML content into PowerPoint or Google Slides and apply a template there. The PDF hub has PDF to PowerPoint for converting in the opposite direction.
Is the presenter timer in Slides Viewer saved between sessions?
No. The timer is a live counter you start, pause and reset for a single run-through, and it resets when you reload the page. It exists to answer whether you are on pace, not to keep a history of rehearsals. The same applies to the pasted content itself: these tools hold your deck in the page, not in an account. Keep your Markdown source in a file, paste it back in when you want to present again, and the thumbnails, zoom and fullscreen controls behave identically.
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