Rotate

Rotate

Rotate selected pages clockwise by a multiple of 90 degrees.

Command line

pdfcpu2 rotate [-p pageSelection] inFile rotation [outFile]

rotation: -180 | -90 | 90 | 180 | 270 (clockwise). Omit outFile to overwrite inFile.

pdfcpu2 rotate in.pdf 90 out.pdf
pdfcpu2 rotate -p odd in.pdf 90                  # classic duplex-scan fix
pdfcpu2 rotate -p l in.pdf 270 out.pdf
cat batch.pdf | pdfcpu2 rotate -p odd - 90 - > batch-fixed.pdf

Go API

package main

import (
	"context"

	"github.com/huzpsb/pdfcpu2/pkg/api"
	"github.com/huzpsb/pdfcpu2/pkg/pdfcpu/model"
)

func main() {
	ctx := context.Background()
	conf := model.NewDefaultConfiguration()

	err := api.RotateFile(ctx, "in.pdf", "out.pdf", 90, []string{"odd"}, conf)
	if err != nil {
		panic(err)
	}
}

Stream variant: api.Rotate(ctx, rs, w, rotation, selectedPages, conf).

Rotation is applied to the page dictionary (/Rotate), not by rewriting content streams — cheap and lossless.