PDF Merge は何をしますか？
PDF Merge はブラウザ上でデータやファイルを変換するツールで、結果と制限を明確に示します。 検証済みの機能： Multiple PDF selection, File reordering, Local page copying, 100 MB total limit.
Local merge protects document transfer
Use local merging for sensitive or moderately sized files. A server service may handle larger documents but requires upload and a separate retention assessment.
使い方
- Choose at least two PDF files with a combined size no greater than 100 MB.
- Arrange the file order and remove unwanted documents.
- Merge, verify the page count, and download merged.pdf.
実際の入出力例
Combine two documents in a chosen order
入力
appendix.pdf (2 pages), report.pdf (8 pages)出力
merged.pdf with 10 pages; appendix pages firstEvery page is copied into a new PDF without converting the page to an image.
一般的なエラーと対処
| 症状 | 原因 | 対処 |
|---|---|---|
| A PDF cannot be opened. | The file is encrypted, damaged, incomplete, or not actually a PDF. | Use an authorized unlocked and valid exported copy. |
| The tab runs out of memory. | The selected files exceed available browser memory. | Merge smaller batches on a device with more available memory. |
PDF structure can block a merge
このツール固有の制限： Encryption, damaged page objects, unsupported security handlers, or insufficient device memory can stop processing. The browser does not upload the file for diagnosis.
標準と実装の参考資料
- pdf-lib documentation (opens in a new tab)Documents the browser PDF library used to copy pages and save the merged file.
PDF Merge — FAQ
Are PDFs uploaded?
No. Selected files are read and merged in the current browser tab.
Does merging change page quality?
Pages are copied rather than rasterized, so content is not intentionally recompressed.
Can encrypted PDFs be merged?
Not reliably. Use an authorized unlocked copy before merging.
更新内容
実質的な更新： PDF Merge: Added local multi-file merging, file reordering, page counting, a 100 MB total guardrail, and merged PDF download.