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).
2026-08-03 07:46:42 +02:00 · 2026-06-18 14:12:28 +08:00
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+---
+description: Apply a pixelation effect to the full image or a specific region.
+---
+
+# Pixelate
+
+Apply a pixelation effect to an entire image or a specific rectangular region. Useful for obscuring sensitive content like faces, license plates, or personal information.
+
+## API Endpoint
+
+`POST /api/v1/tools/image/pixelate`
+
+Accepts multipart form data with an image file and a JSON `settings` field.
+
+## Parameters
+
+| Parameter | Type | Required | Default | Description |
+|-----------|------|----------|---------|-------------|
+| blockSize | integer | No | `12` | Pixel block size (2-128); larger values produce coarser pixelation |
+| region | object | No | - | Restrict pixelation to a rectangle (see below) |
+
+### Region Object
+
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| left | integer | Yes | Left offset in pixels (>= 0) |
+| top | integer | Yes | Top offset in pixels (>= 0) |
+| width | integer | Yes | Region width in pixels (>= 1) |
+| height | integer | Yes | Region height in pixels (>= 1) |
+
+## Example Request
+
+Pixelate the full image:
+
+```bash
+curl -X POST http://localhost:1349/api/v1/tools/image/pixelate \
+  -H "Authorization: Bearer si_your-api-key" \
+  -F "file=@photo.jpg" \
+  -F 'settings={"blockSize": 20}'
+```
+
+Pixelate a specific region:
+
+```bash
+curl -X POST http://localhost:1349/api/v1/tools/image/pixelate \
+  -H "Authorization: Bearer si_your-api-key" \
+  -F "file=@photo.jpg" \
+  -F 'settings={"blockSize": 16, "region": {"left": 100, "top": 50, "width": 200, "height": 150}}'
+```
+
+## Example Response
+
+```json
+{
+  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
+  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/photo.jpg",
+  "originalSize": 2450000,
+  "processedSize": 2380000
+}
+```
+
+## Notes
+
+- When `region` is omitted, the entire image is pixelated.
+- The region coordinates are in pixels relative to the top-left corner of the image. The region must fall within the image bounds.
+- Output format matches the input format. HEIC, RAW, PSD, and SVG inputs are automatically decoded before processing.