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: Generate barcodes in Code 128, EAN-13, UPC-A, Code 39, ITF-14, and Data Matrix formats.
+---
+
+# Barcode Generator
+
+Generate barcode images from text input. Supports Code 128, EAN-13, UPC-A, Code 39, ITF-14, and Data Matrix formats.
+
+## API Endpoint
+
+`POST /api/v1/tools/image/barcode-generate`
+
+Accepts an `application/json` body (not multipart). The barcode is generated from the provided text, not from an uploaded file.
+
+## Parameters
+
+| Parameter | Type | Required | Default | Description |
+|-----------|------|----------|---------|-------------|
+| text | string | Yes | - | Text to encode in the barcode (1-256 characters) |
+| type | string | No | `"code128"` | Barcode format: `code128`, `ean13`, `upca`, `code39`, `itf14`, `datamatrix` |
+| scale | integer | No | `3` | Image scale factor (1-8) |
+| includeText | boolean | No | `true` | Whether to render the text below the barcode |
+
+## Example Request
+
+```bash
+curl -X POST http://localhost:1349/api/v1/tools/image/barcode-generate \
+  -H "Authorization: Bearer si_your-api-key" \
+  -H "Content-Type: application/json" \
+  -d '{"text": "5901234123457", "type": "ean13", "scale": 4}'
+```
+
+## Example Response
+
+```json
+{
+  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
+  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/barcode.png",
+  "originalSize": 0,
+  "processedSize": 4520
+}
+```
+
+## Notes
+
+- Unlike most tools, this endpoint accepts a JSON body, not multipart form data, since barcodes are generated from text rather than an uploaded file.
+- EAN-13 requires exactly 12 or 13 digits. UPC-A requires exactly 11 or 12 digits. If a check digit is omitted, it is calculated automatically.
+- Code 128 is the most flexible format and supports the full ASCII character set.
+- Data Matrix produces a 2D barcode suitable for encoding longer strings in a compact square.