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: Resize images by pixels, percentage, or with fit modes.
+---
+
+# Resize
+
+Resize images by specifying exact pixel dimensions, a percentage scale factor, or a fit mode that controls how the image adapts to the target dimensions.
+
+## API Endpoint
+
+`POST /api/v1/tools/image/resize`
+
+Accepts multipart form data with an image file and a JSON `settings` field.
+
+## Parameters
+
+| Parameter | Type | Required | Default | Description |
+|-----------|------|----------|---------|-------------|
+| width | integer | No | - | Target width in pixels (max 16383) |
+| height | integer | No | - | Target height in pixels (max 16383) |
+| fit | string | No | `"contain"` | How the image fits the dimensions: `contain`, `cover`, `fill`, `inside`, `outside` |
+| withoutEnlargement | boolean | No | `false` | Prevent upscaling if image is smaller than target |
+| percentage | number | No | - | Scale by percentage (e.g. 50 for half size) |
+
+At least one of `width`, `height`, or `percentage` must be provided.
+
+### Fit Modes
+
+- **contain** - Resize to fit within the dimensions, preserving aspect ratio (may leave empty space)
+- **cover** - Resize to cover the dimensions, preserving aspect ratio (may crop)
+- **fill** - Stretch to exactly match dimensions (ignores aspect ratio)
+- **inside** - Like `contain`, but only downscales, never upscales
+- **outside** - Like `cover`, but only downscales, never upscales
+
+## Example Request
+
+```bash
+curl -X POST http://localhost:1349/api/v1/tools/image/resize \
+  -H "Authorization: Bearer si_your-api-key" \
+  -F "file=@photo.jpg" \
+  -F 'settings={"width": 800, "height": 600, "fit": "contain"}'
+```
+
+Resize by percentage:
+
+```bash
+curl -X POST http://localhost:1349/api/v1/tools/image/resize \
+  -H "Authorization: Bearer si_your-api-key" \
+  -F "file=@photo.jpg" \
+  -F 'settings={"percentage": 50}'
+```
+
+## Example Response
+
+```json
+{
+  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
+  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/photo.jpg",
+  "originalSize": 2450000,
+  "processedSize": 980000
+}
+```
+
+## Notes
+
+- Maximum dimension is 16383 pixels on either axis (Sharp/libvips limit).
+- Output format matches the input format. HEIC, RAW, PSD, and SVG inputs are automatically decoded before processing.
+- EXIF orientation is auto-applied before resizing.
+- The `withoutEnlargement` flag is useful for batch processing where some images may already be smaller than the target.