Stop wasting 45 minutes per article on manual content migration. Convert ChatGPT, Claude, and Markdown files directly to Sanity's Portable Text format with one click.
If you're creating content with AI tools like Claude or ChatGPT, you know they export everything as Markdown. But Sanity CMS uses Portable Text, a completely different format that requires complex JSON structures with blocks, spans, and marks.
The manual process is painful: Copy each paragraph individually. Reformat every heading. Fix broken links. Reconstruct code blocks. What should take 2 minutes takes 45. For teams publishing 20+ articles monthly, that's 15 hours of lost productivity.
Our free converter instantly transforms any Markdown content into perfectly formatted Portable Text JSON. Just paste, convert, and copy. Your content is ready for Sanity Studio or the Sanity API in seconds. No sign-up required, no data stored. Everything happens in your browser.
The Hidden Cost of Manual Markdown to Portable Text Migration
Every day, thousands of content teams waste hours converting Markdown to Portable Text. Here's why this seemingly simple task is destroying your content velocity:
The Complexity Gap Between Markdown and Portable Text
Markdown uses simple, human-readable syntax:
## My HeadingThis is a **bold** paragraph with a [link](https://example.com).
But Portable Text requires complex JSON structures:
Manual conversion means reconstructing this JSON structure by hand for every single element in your content.
Who's Losing Time to Manual Conversion?
Content Teams Using AI Writers
Marketing teams using Claude, ChatGPT, or Perplexity for content creation face a critical bottleneck. These AI tools only export Markdown, but Sanity needs Portable Text. Result: 30-45 minutes of reformatting per article.
Real Impact: A content team producing 20 articles/month loses 15 hours to migration, likely $2,000+ in monthly labor costs.
Technical Writers and Developer Advocates
Technical documentation lives in Markdown. GitHub READMEs, API docs, tutorials; They all use Markdown. But when your company blog runs on Sanity, every technical article requires painful manual conversion, especially for code blocks with syntax highlighting.
Real Impact: Developer advocates spend 20% of their time on content migration instead of content creation.
SEO Agencies and Content Studios
Agencies managing multiple Sanity installations waste countless billable hours on content migration. When you're publishing 50+ pieces monthly across clients, manual conversion becomes a significant operational burden.
Real Impact: Agencies report losing $5,000 - 10,000 monthly in billable hours to content migration tasks.
What Our Converter Handles Automatically
Complete Markdown Support
All Headers (H1-H6) - Maintains proper hierarchy
Rich Text Formatting - Bold, italic, strikethrough
Links - Both inline and reference-style
Lists - Ordered, unordered, and nested
Code Blocks - With language detection
Inline Code - Preserves backticks
Blockquotes - Proper quote formatting
Developer-Friendly Output
Valid JSON - Passes Sanity validation every time
Proper Keys - No duplicate key errors
Optimized Structure - Minimal nesting for performance
Clean Marks - Properly structured text annotations
How to Use Your Converted Content in Sanity
Method 1: Direct Studio Import
Copy the generated Portable Text JSON
In Sanity Studio, click the three-dot menu in any Portable Text field
While our free converter handles individual documents perfectly, we're building enterprise features for power users:
Bulk Converter (Q1 2026)
Convert entire documentation repositories
Maintain cross-document links
Preserve frontmatter and metadata
Direct Sanity dataset upload
CSV mapping for structured content
Custom Block Mapping
Map Markdown patterns to custom Portable Text blocks
Support for company-specific components
Preserve special annotations
Team formatting standards
AI Enhancement Layer
Automatic SEO optimization during conversion
Smart alt text generation
Content structure validation
Readability improvements
Why ContentWrap's Converter Is Different
Built by Migration Experts
We've migrated over 10,000 documents to Sanity, including enterprise documentation systems, multi-language content, and complex technical wikis. Every edge case is handled.
Privacy-First Design
No server storage - Conversion happens in your browser
No tracking - We don't analyze your content
No sign-up - Start converting immediately
Open core - Audit our conversion logic
Enterprise-Ready Output
Validates against Sanity's schema requirements
Handles special characters and Unicode
Preserves document structure
Maintains content relationships
Rich Text to Portable Text Converter
Convert rich text from Google Docs, Word, Notion, or any WYSIWYG editor to Sanity-ready Portable Text JSON. No more losing formatting during content migration.
