SnapOtter/apps/docs/tools/image/rotate.md

description

description
Rotate images by any angle and flip horizontally or vertically.

Rotate & Flip

Rotate images by an arbitrary angle and/or flip them horizontally or vertically. Rotation and flip operations can be combined in a single request.

API Endpoint

POST /api/v1/tools/image/rotate

Accepts multipart form data with an image file and a JSON settings field.

Parameters

Parameter	Type	Required	Default	Description
angle	number	No	0	Rotation angle in degrees (clockwise). Accepts any numeric value.
horizontal	boolean	No	false	Flip the image horizontally (mirror)
vertical	boolean	No	false	Flip the image vertically

Example Request

Rotate 90 degrees clockwise:

curl -X POST http://localhost:1349/api/v1/tools/image/rotate \
  -H "Authorization: Bearer si_your-api-key" \
  -F "file=@photo.jpg" \
  -F 'settings={"angle": 90}'

Flip horizontally:

curl -X POST http://localhost:1349/api/v1/tools/image/rotate \
  -H "Authorization: Bearer si_your-api-key" \
  -F "file=@photo.jpg" \
  -F 'settings={"horizontal": true}'

Rotate and flip together:

curl -X POST http://localhost:1349/api/v1/tools/image/rotate \
  -H "Authorization: Bearer si_your-api-key" \
  -F "file=@photo.jpg" \
  -F 'settings={"angle": 45, "vertical": true}'

Example Response

{
  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/photo.jpg",
  "originalSize": 2450000,
  "processedSize": 2480000
}

Notes

• Rotation is applied first, then flip operations.
• Non-90-degree rotations (e.g. 45 degrees) will enlarge the canvas to fit the rotated image, with transparent or black fill depending on the output format.
• Common values: 90, 180, 270 for quarter-turn rotations.
• EXIF orientation is auto-applied before processing, so the rotation is relative to the visual orientation.