🧩Learn Chunking Strategies for RAG
Compare fixed, recursive, semantic, and document-aware chunking on the same source so trade-offs become visible — then pick a chunking strategy for one of your own document types and defend the choice.
Phase 1Why Chunking Decides Your Retrieval Quality
See why chunk size and boundaries beat fancier embedding tricks
Bad chunks beat a great embedding model every time
6 minBad chunks beat a great embedding model every time
The 500-token chunk is a hunch, not a strategy
6 minThe 500-token chunk is a hunch, not a strategy
Retrieval doesn't fail loudly — it fails by half-answer
7 minRetrieval doesn't fail loudly — it fails by half-answer
Four chunking strategies, one decision space
6 minFour chunking strategies, one decision space
Phase 2Fixed, Recursive, and Semantic on One Doc
Run fixed, recursive, and semantic splits on one document
Pick one document and three queries — that's your test rig
7 minPick one document and three queries — that's your test rig
Run fixed-size first — the baseline that exposes everything else
7 minRun fixed-size first — the baseline that exposes everything else
Recursive splitting respects what your document already tells it
7 minRecursive splitting respects what your document already tells it
Semantic chunking splits where the topic actually shifts
8 minSemantic chunking splits where the topic actually shifts
Three strategies, three queries — read the diff before you decide
8 minThree strategies, three queries — read the diff before you decide
Phase 3Overlap, Parent-Child, and Structure-Aware Splits
Handle overlap, parent-child chunks, and code, tables, PDFs
Overlap, parent-child, or structure-aware — pick the fix at the scale of the failure
8 minOverlap, parent-child, or structure-aware — pick the fix at the scale of the failure
Embed small for precision, return big for context — that's parent-child
8 minEmbed small for precision, return big for context — that's parent-child
Code and tables fail because their boundaries aren't punctuation
8 minCode and tables fail because their boundaries aren't punctuation
With PDFs, the first chunking decision is which extractor to trust
8 minWith PDFs, the first chunking decision is which extractor to trust
Phase 4Pick and Defend a Strategy for Your Docs
Pick and defend a chunking strategy for your own document
Pick a chunking strategy for your own document type — and defend it
18 minPick a chunking strategy for your own document type — and defend it
Frequently asked questions
- Why does my RAG system miss obvious matches near boundaries?
- This is covered in the “Learn Chunking Strategies for RAG” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- What's the difference between fixed, recursive, and semantic chunking?
- This is covered in the “Learn Chunking Strategies for RAG” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- How do I pick a chunk size for my documents?
- This is covered in the “Learn Chunking Strategies for RAG” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- When should I use parent-child chunks instead of bigger chunks?
- This is covered in the “Learn Chunking Strategies for RAG” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
- Does chunking matter more than the embedding model I choose?
- This is covered in the “Learn Chunking Strategies for RAG” learning path. Start with daily 5-minute micro-lessons that build from fundamentals to hands-on application.
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