Conversion model
Key difference- JS-native engine
- JavaScript function call
- LibreOffice headless
- External office process
Compare
Drop the Docker image. Convert DOCX to PDF with a function call.
No LibreOffice process. No font package drift. No single-threaded bottlenecks. One JavaScript function call converts DOCX to PDF in-process.
[01] Side by side
Where the conversion stacks differ
These are the practical reasons teams start looking for a native conversion path.
| Capability | JS-native engine | LibreOffice headless |
|---|---|---|
| Conversion model | JavaScript function call | External office process |
| Concurrency | In-process, app-managed | Single-threaded bottlenecks and crashes |
| Malformed input handling | App-level failure handling | Can hang at 100% CPU |
| Fonts | Same JS document pipeline | Font package drift and substitution |
| Infrastructure | No external office runtime | Docker image, fonts, process supervision |
| Format breadth | DOCX → PDF only | Broader legacy office coverage |
[02] When LibreOffice is still right
Remove LibreOffice from the DOCX path first.
PaperJSX handles DOCX-to-PDF natively. If your pipeline also converts ODT or RTF, you can keep LibreOffice for those formats while removing it from the highest-volume, highest-pain conversion path.
[03] The practical split
Runtime simplicity versus office-suite breadth.
This decision is usually less about syntax and more about what kind of infrastructure you want to keep carrying.
Native route
Use this when the office runtime is the product problem.
Best when JavaScript teams want conversion to stay inside the app instead of supervising a separate office process.
- No LibreOffice process management
- Same document pipeline as generation
JSlighter ops
LibreOffice route
May still be needed for legacy formats.
If you need ODT, RTF, or maximum fidelity for very complex Word documents, LibreOffice covers more edge cases.
- Broader legacy office coverage
- Higher upside on complex documents
Officeruntime heavy
Convert a DOCX to PDF in one function call.
No Docker image. No process supervision. No font packages to maintain. Run the same document through both paths and compare the operational cost.