How to Run IronPDF for Java in an Azure Function

  • IronPDF for Java only supports Docker deployment.
  • Zip Deployment is not supported, since IronPDF requires execution of binaries at runtime.

  1. Follow this Microsoft Official guide

  2. Add the IronPDF dependency

    • Add this to your pom with the latest <version>
    • Note: ironpdf-engine-linux is required to run IronPDF in Docker.
  3. Add a RenderPdf function

    • Add a new function in
    • This function will receive an URL and return a rendered PDF.
    public class Function {
    public HttpResponseMessage renderPdf(
                    name = "req",
                    methods = {HttpMethod.GET, HttpMethod.POST},
                    authLevel = AuthorizationLevel.ANONYMOUS)
            HttpRequestMessage<Optional<String>> request,
            final ExecutionContext context) {
        context.getLogger().info("Java HTTP trigger processed a request. (RenderPdf)");
        // Parse query parameter
        final String url = request.getQueryParameters().get("url");
        if (url == null) {
            return request.createResponseBuilder(HttpStatus.BAD_REQUEST).body("Please pass a url on the query string").build();
        } else {
            context.getLogger().info("IronPDF try to render url: " + url);
            PdfDocument pdfDocument = com.ironsoftware.ironpdf.PdfDocument.renderUrlAsPdf(url);
            byte[] content = pdfDocument.getBinaryData();
            return request.createResponseBuilder(HttpStatus.OK)
                    .header("Content-Disposition", "attachment; filename=ironpdf_result.pdf")
  4. Update Dockerfile

    • Add the IronPdf Linux required packages. From the example the base Docker image is$JAVA_VERSION-build, which is Debian 11 So we need to add these package to the docker file.
    RUN apt update \
    && apt install -y libgdiplus libxkbcommon-x11-0 libc6 libc6-dev libgtk2.0-0 libnss3 libatk-bridge2.0-0 libx11-xcb1 libxcb-dri3-0 libdrm-common libgbm1 libasound2 libxrender1 libfontconfig1 libxshmfence1
    RUN apt-get install -y xvfb libva-dev libgdiplus
  5. Redeploy your function to Azure
    1. Build & package mvn clean package
    2. Build Docker image e.g. docker build --tag <DOCKER_ID>/azurefunctionsimage:v1.0.0 .
    3. Push Docker image e.g. docker push <DOCKER_ID>/azurefunctionsimage:v1.0.0
    4. Update Azure function e.g. az functionapp create --name <APP_NAME> --storage-account <STORAGE_NAME> --resource-group AzureFunctionsContainers-rg --plan myPremiumPlan --deployment-container-image-name <DOCKER_ID>/azurefunctionsimage:v1.0.0
  6. Enjoy IronPDF
    • Trigger function at:https://<APP_NAME>
    • Note: The first time function was triggered, It may slow or fail due to initializing, but after that it will be fine.