Official sources reviewed
| Primary source | What it establishes | Review date |
|---|---|---|
| ExcelJS repository documentation | Published workbook API, supported features, and open limitations. | 2026-07-22 |
What this decision is actually about
The big decision is simple: are you manipulating workbooks, or generating finished spreadsheets with native charts? ExcelJS is good at the first job. It still cannot do the second one.
Evaluation prompts—not a feature scorecard
| Alternative boundary | Confirm the supported input, deployment, and output behavior in the official source above using your current version. |
| PaperJSX boundary | Prove one real artifact locally first; local package behavior does not imply hosted access. |
| Delivery decision | Test the native file, recipient handoff, and release check that matter in your product. |
When PaperJSX is the better fit
Choose PaperJSX when the spreadsheet is a product deliverable and native charts are part of the job. That is where generation-first tooling matters more than read-write flexibility.
When ExcelJS is the better fit
If the job is reading, parsing, or mutating existing workbooks without chart creation, ExcelJS may be sufficient.
Cost of choosing PaperJSX
ExcelJS has stronger read-write and streaming capabilities. Teams that only need workbook manipulation without chart creation may not need PaperJSX yet.
Evaluate the file your customer receives.
Bring one real payload, its expected file, and the release check you cannot miss. Pro and Platform are self-serve; contact us when the evaluation requires Enterprise terms or architecture review.