A shell script to batch convert SVG files to PNG using the Inkscape command line

svg2png_batch.md

svg2png_batch

A shell script to batch convert SVG images to PNG using the Inksacpe command line.

• Given a folder containing SVG files, each image is converted to a PNG.
• Original folder structure is maintained.
• Supports specification of the output image resolution

---

Getting started

• Inkscape nust be installed and availble in the $PATH (check with inkscape --version).
• Download the script and change modify the permission, so that the file is executable chmod +x svg2png_batch.sh.

---

Use

# convert the SVG files located in the <inout_folder> to PNG images
#!/bin/bash
./svg2png_batch.sh <input_folder> <output_folder> <resolution>

<input_folder> -- Folder where the SVG files are located
<output_folder> -- Folder where the outputs will be written
<resolution> -- Output image resolution

svg2png_batch.sh

#!/bin/bash



# Check for correct number of arguments
if [ "$#" -ne 3 ]; then
  echo "Usage: $0 <input_folder> <output_folder> <resolution>"
  exit 1
fi

INPUT_FOLDER=$1
OUTPUT_FOLDER=$2
RESOLUTION=$3

# Check if the input folder exists
if [ ! -d "$INPUT_FOLDER" ]; then
  echo "Error: Input folder does not exist."
  exit 1
fi

# Create output folder if it doesn't exist
mkdir -p "$OUTPUT_FOLDER"

# Find all SVG files and store count
SVG_FILES=($(find "$INPUT_FOLDER" -name '*.svg'))
TOTAL_FILES=${#SVG_FILES[@]}

# Check if there are SVG files
if [ $TOTAL_FILES -eq 0 ]; then
  echo "No SVG files found in the directory."
  exit 1
fi

echo "Starting conversion of $TOTAL_FILES files..."

# Loop over all SVG files and convert them
for ((i=0; i<$TOTAL_FILES; i++)); do
  SVG_FILE=${SVG_FILES[$i]}
  RELATIVE_PATH="${SVG_FILE#$INPUT_FOLDER}"
  PNG_FILE="$OUTPUT_FOLDER/${RELATIVE_PATH%.svg}.png"
  # Ensure output directory exists
  mkdir -p "$(dirname "$PNG_FILE")"

  # Log the folder and file being processed
  echo -n "Processing ($((i+1))/$TOTAL_FILES): $SVG_FILE"
  
  # Convert SVG to PNG using Inkscape
  inkscape "$SVG_FILE" --export-type=png --export-filename="$PNG_FILE" --export-dpi="$RESOLUTION"

  # Simple progress bar
  PERCENT=$(( (i + 1) * 100 / TOTAL_FILES ))
  printf "\r[%-50s] %d%%" $(printf "#%.0s" $(seq 1 $((PERCENT / 2)))) $PERCENT
  echo ""
done

echo "Conversion completed."