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SnapOtter/apps/docs/tools/pdf/merge-pdf.md
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SnapOtterandGitHub 00b651c9f8 feat(i18n): 21-language pipeline, landing/docs/API wiring, landing+API translations
Shared Claude Code translation pipeline (scripts/i18n, no API key) plus Astro/VitePress/Scalar i18n wiring. Landing and API reference translated into all 20 languages; docs i18n wiring + English source anchors. The translated docs markdown (apps/docs/<locale>/**, 3,620 files) follows in a companion PR because it exceeds GitHub's per-PR CI file limit.
2026-07-11 13:01:55 +08:00

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---
description: Combine multiple PDFs into a single document.
---
# Merge PDFs {#merge-pdfs}
Combine two or more PDF files into a single document, preserving the page order of each input file.
## API Endpoint {#api-endpoint}
`POST /api/v1/tools/pdf/merge-pdf`
Accepts multipart form data with two or more PDF files. No `settings` field is required.
## Parameters {#parameters}
This tool has no settings parameters. Simply upload two or more PDF files.
| Constraint | Value |
|------------|-------|
| Minimum files | 2 |
| Maximum files | 20 |
## Example Request {#example-request}
```bash
curl -X POST http://localhost:1349/api/v1/tools/pdf/merge-pdf \
-H "Authorization: Bearer si_your-api-key" \
-F "file=@document1.pdf" \
-F "file=@document2.pdf" \
-F "file=@document3.pdf"
```
## Example Response {#example-response}
```json
{
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/merged.pdf",
"originalSize": 4500000,
"processedSize": 4200000
}
```
## Notes {#notes}
- Files are merged in the order they are uploaded.
- At least two PDF files are required; the request will fail with a 400 error if fewer are provided.
- The maximum number of input files is 20.
- Encrypted PDFs must be unlocked before merging.