Combine PowerPoint files — free online .pptx merger
Updated 2026-04-20 · ~5 min read · Tool + guide
slideforge.dev merges 2–10 .pptx files into one editable deck in under 5 seconds. Fonts, colors, layouts, charts, and embedded images (logos, icons, AI-generated pictures) are preserved per slide. Output is a real .pptx you can open in PowerPoint, Google Slides, or Keynote — not an image, not an HTML export. No subscription; $3 free credit on signup covers ~100 merges.
Drag up to 10 .pptx files here, or
Max 20 MB per file, 100 MB total. .pptx only (not .ppt).
TL;DR
- slideforge.dev merges .pptx files at 2-10 per batch, 20 MB per file, 100 MB total.
- Preserves fonts, colors, layouts, charts, embedded images. Slide masters from the first file become the deck's master.
- Output is a real editable .pptx (not images, not HTML).
- Free $3 credit on signup. ~$0.02 per output slide after that. No subscription.
- Also available programmatically: REST API and MCP server.
When to use this tool
Consolidating team decks
Each team ships their portion of a quarterly review as a separate .pptx. Drop all of them in, get one consolidated deck with everyone's formatting intact. Typical use: 4–8 files, ~15 slides each.
Assembling a client proposal from reusable sections
You maintain a library of .pptx sections (introduction, methodology, case studies, pricing, appendix). Pick the relevant ones, merge. Faster than copy-pasting slides across PowerPoint windows.
Automating report compilation
Your pipeline generates weekly KPI slides from different data sources as separate .pptx files. A cron job calls POST /v1/compile with the job IDs and returns the merged deck. See the API docs for automation patterns.
How merging works
- Drop your files above. 2 minimum, 10 maximum. Order matters — the first file becomes the slide-master template.
- Check the order. Drag to rearrange if needed. The merger appends slides in the order shown.
- Sign up with a free $3 credit and click Merge. No credit card required. The merger reads each file's slides and copies them into a single new deck.
- Download the merged .pptx. Every shape, text box, chart, and embedded image is preserved as an editable object.
Merge PowerPoint online — tool comparison
Related: PowerPoint API guide · MCP server setup · slideforge.dev vs SlideSpeak
Merge PowerPoint via API
If you need to merge decks programmatically — from a cron job, an AI agent, or a batch pipeline — use the POST /v1/compile endpoint. Compose slides individually via create_slide, then merge by job ID:
curl -X POST https://api.slideforge.dev/v1/compile \
-H "Authorization: Bearer sf_live_..." \
-H "Content-Type: application/json" \
-d '{
"title": "Q3 board deck",
"job_ids": [
"a1b2c3...",
"d4e5f6...",
"g7h8i9..."
]
}'
# Returns 202 with job_id. Poll GET /v1/jobs/{id} for the merged .pptx URL.Frequently asked questions
How do I combine multiple PowerPoint files into one?
Upload 2–10 .pptx files to slideforge.dev/tools/combine-powerpoint. The merger preserves each file's fonts, colors, layouts, and embedded images (logos, icons, AI-generated images). Output is a single native .pptx file you can open and edit in PowerPoint, Google Slides, or Keynote. Free $3 credit on signup covers dozens of merges.
Does the PowerPoint merger preserve formatting and fonts?
Yes. Each slide's original fonts, colors, shapes, charts, and embedded images are preserved on a slide-by-slide basis. Slide masters from the first file are used as the template for the merged deck. If your files use different themes, the first file's theme wins — rename or reorder files if you want a specific theme to dominate.
What file size limits apply?
Up to 10 .pptx files per merge, 20 MB per file, 100 MB total. Most consulting decks are under 5 MB per file even with embedded images, so this handles 10–50 slide decks comfortably. If you need larger files, use the SlideForge API directly at api.slideforge.dev.
Is there a PowerPoint merge API for automation?
Yes. slideforge.dev ships a REST API (POST /v1/compile) and a native MCP server (at api.slideforge.dev/mcp/) for automated workflows. If you're building a SaaS product that needs to merge PowerPoint files programmatically, you can call the API from any language. See the API reference at slideforge.dev/docs/api and the MCP setup at slideforge.dev/docs/mcp.
How is this different from combining PPT files in PowerPoint itself?
Microsoft PowerPoint's 'Reuse Slides' feature requires opening each file manually and copying slides one at a time. slideforge.dev merges 10 files in under 5 seconds with no manual steps. For occasional 2–3 file merges, PowerPoint is fine; for 5+ file merges or batch processing, the API-driven approach is materially faster.
Can I merge PPT files instead of PPTX?
The tool accepts .pptx (the modern Microsoft Office format). Legacy .ppt files must be converted first — open the .ppt file in PowerPoint, choose 'Save As', and pick 'PowerPoint Presentation (.pptx)'. PowerPoint 2007+ handles this conversion natively.
What does it cost?
Free $3 credit on signup covers ~100 merge operations. After that, merges use the standard compile cost (approximately $0.02 per slide in the merged output). No subscription — USD wallet with $10 minimum top-up and volume discounts up to +20%.
How does slideforge.dev compare to SlideSpeak's combine tool?
SlideSpeak offers a free no-login combine tool too. The main differences: slideforge.dev is API-first so you can script batch merges from a cron job or agent workflow; SlideSpeak is web-UI only. slideforge.dev also integrates with 35 composable components and MCP for Claude Desktop / Cursor, so the merge is one step in a larger agent-driven slide pipeline. For one-off web-UI merges of 2–3 files, either works; for automation at scale, the API matters.
Merge your first deck in under 60 seconds.
$3 free credit covers ~100 merges. No subscription. No credit card.
Canonical: slideforge.dev/tools/combine-powerpoint. SlideForge is published by Smart Data Brokers GmbH, Zurich. Not affiliated with slideforge.io, slideforge.fr, or unrelated GitHub repositories of the same name.