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. Merge your first two decks with no account, both in full; a free account merges all ten. No subscription, and merging never costs slide credits.
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).
- Merging is free — it doesn't consume slide credits or bill per slide. 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.
- Click Merge. The first two files merge with no account at all — both in full, nothing trimmed. Merging all ten takes a free account; either way 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. The first two files merge with no account — both in full, no watermark; merging all ten takes a free account, and merging never costs slide credits.
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?
Merging is free — it's deck plumbing, so it doesn't consume slide credits or bill per slide. You only pay the standard $0.05/slide when you generate new slides via the API. 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 200+ catalog layouts 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.
Two decks merge with no account. All ten need a free one. Merging is free either way — 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.