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SnapOtter/apps/docs/tools/pdf/crop-pdf.md
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SnapOtter d24e244af4 docs: organize tool pages by modality under /tools/<modality>/
Move all 157 tool pages into image/video/audio/pdf/data subfolders so URLs read /tools/<modality>/<id> (e.g. /tools/image/crop). Nest the image sub-categories under an Image group in the sidebar so the nav reads by modality. Add public/_redirects (301, clean + .html forms) mapping every old flat /tools/<id> URL to its new path so inbound links keep working. Rewrite all internal /tools links. Verified with a clean docs build (no dead links).
2026-06-18 14:12:28 +08:00

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---
description: Crop all pages of a PDF with a uniform margin.
---
# Crop PDF
Crop all pages of a PDF by applying a uniform margin, trimming content from each edge equally.
## API Endpoint
`POST /api/v1/tools/pdf/crop-pdf`
Accepts multipart form data with a PDF file and a JSON `settings` field.
## Parameters
| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| margin | number | No | `20` | Uniform crop margin in points (0-2000) |
## Example Request
```bash
curl -X POST http://localhost:1349/api/v1/tools/pdf/crop-pdf \
-H "Authorization: Bearer si_your-api-key" \
-F "file=@document.pdf" \
-F 'settings={"margin": 50}'
```
## Example Response
```json
{
"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/document.pdf",
"originalSize": 2450000,
"processedSize": 2440000
}
```
## Notes
- The margin value is in PDF points (1 point = 1/72 inch).
- The same margin is applied to all four edges of every page.
- A margin of `0` removes all existing crop margins, showing the full media box.