Binary Ninja HLIL — decompiler IR overview
HLIL (High Level Intermediate Language) is Binary Ninja's decompiler-facing IR: a tree-based representation that recovers high-level control flow (if / while / for / switch), folds expressions and uses recovered types. It sits above MLIL and LLIL in Vector 35's BNIL stack (BNIL overview).
This page explains what HLIL is for. It is not a Binary Ninja sales pitch and not a cracking guide.
Where HLIL sits
Per Binary Ninja docs:
- Lifted IL / LLIL — close to instruction semantics.
- MLIL — variables, types, calls and data-flow friendly form.
- HLIL — higher-level control flow, dead-code / simplification passes and an AST used by the linear decompiler view.
Use HLIL when you want source-like reading or source-level style queries; drop to MLIL/LLIL when you need finer data-flow or flag-level detail.
AST vs non-AST
Upstream HLIL docs distinguish:
- AST form — what linear view shows; nested bodies under control-flow statements (
hlil.root). - Non-AST form — flat statements per block (
hlil.instructions), nesting expressed by the CFG (graph view).
Both describe the same function; pick the form that matches your script.
Editions reminder (official prices, 2026-10-24 UTC)
| Edition | Price shown | Notes relevant to HLIL / automation |
|---|---|---|
| Free | $0 | Local decompiler for listed arches; no API/plugin access (vendor Free page) |
| Personal | $199 + tax ($49 student) | Non-commercial; fuller architecture set; API via GUI/console per vendor docs |
| Commercial | $1799 + tax ($449 student) | Commercial use + headless/plugin automation features as published |
When HLIL-centric workflows fit
- Choose Binary Ninja when your team already standardizes on BNIL/HLIL scripting.
- Choose Ghidra when you need a free Apache-2.0 suite with a large public script corpus.
- Compare costs on Binary Ninja pricing before buying.
Authorized binaries only. BinBench does not redistribute Binary Ninja.
FAQ
Is HLIL the same as Ghidra's decompiler?
No. Both produce readable high-level views, but HLIL is Binary Ninja's own IR family (LLIL → MLIL → HLIL). Compare outputs on samples you may analyze.
Can I use the plugin API on Binary Ninja Free?
Vector 35 states Free has no API/plugin access. Personal/Commercial unlock richer automation — confirm on the purchase page.
How much is Binary Ninja?
On 2026-10-24 (UTC) the purchase page listed Free $0, Personal $199 + tax ($49 student), Commercial $1799 + tax ($449 student). Re-check before buying.
Is HLIL always valid C?
Upstream docs describe HLIL as a high-level IR with recovered control flow and folded expressions — not a guarantee of compilable C.
Where do I read more?
Start at docs.binary.ninja BNIL overview and the HLIL page linked in Sources.