Gamma Migration Deep Dive

Contents

• Overview

• Prerequisites

• Instructions

• Output

• Error Handling

• Examples

• Resources

Overview

Comprehensive guide for migrating presentations and workflows from PowerPoint, Google Slides, Canva, and other platforms to Gamma with validation and rollback support.

Prerequisites

• Gamma API access

• Source platform export capabilities

• Node.js 18+ for migration scripts

• Sufficient Gamma storage quota

Instructions

Step 1: Inventory Source Presentations

Scan source directories for .pptx , .pdf , and .key files. Generate a JSON inventory with metadata (title, size, source platform, last modified).

Step 2: Build Migration Engine

Create a migration engine with concurrent batch processing, retry logic, and progress reporting. Use PQueue for concurrency control.

Step 3: Handle Platform-Specific Exports

• Google Slides: Export via Drive API as .pptx , then import to Gamma

• PowerPoint: Extract metadata from docProps/core.xml before import

• Canva/Keynote: Export as .pptx first, then import

Step 4: Validate Migrated Presentations

Verify each migrated presentation has slides, all assets loaded, and can export.

Step 5: Create Rollback Snapshots

Save source-to-Gamma ID mappings as snapshots. If migration fails, delete Gamma copies.

See detailed implementation for advanced patterns.

Output

• Migration inventory JSON

• Batch migration with concurrency control

• Platform-specific import handlers

• Validation and rollback support

Error Handling

Issue Cause Solution

Import timeout Large file size Increase timeout to 120s

Asset missing Embedded fonts/media Re-export with embedded assets

Format mismatch Unsupported features Export as PDF fallback

Examples

Supported Migration Paths

Source Format Fidelity Notes

PowerPoint .pptx High Native import

Google Slides .pptx export High Export first

Canva .pdf/.pptx Medium Limited animations

Keynote .pptx export High Export first

Markdown .md High Structure preserved

Migration Checklist

• Inventory all source presentations

• Test import with sample files

• Run migration in batches

• Validate each batch

• Update links and references

Resources

• Gamma Import Formats

• Migration Best Practices