The HTML to PDF REST API you forget about.

using System;
using SelectPdf.Api;

HtmlToPdfClient client = new HtmlToPdfClient(apiKey);
client.setPageSize(PageSize.A4);             // A0–A8, Letter, Legal
client.setPageOrientation(PageOrientation.Portrait);
client.setMargins(0);
client.setRenderingEngine(RenderingEngine.WebKit); // or Chromium
client.setShowPageNumbers(false);
client.setPdfBookmarksSelectors("H1, H2");   // outline from H1/H2

// --- Convert a live URL to a local PDF ---
client.convertUrlToFile(url, localFile);
Console.WriteLine("Pages: " + client.getNumberOfPages());

// --- Convert a raw HTML string to bytes (in-memory) ---
byte[] pdf = client.convertHtmlString("<h1>Hi</h1>");
Console.WriteLine("Credits left: " + client.CreditsRemaining);

package com.selectpdf;

HtmlToPdfClient client = new HtmlToPdfClient(apiKey);
client.setPageSize(ApiEnums.PageSize.A4);
client.setPageOrientation(ApiEnums.PageOrientation.Portrait);
client.setMargins(0);
client.setRenderingEngine(ApiEnums.RenderingEngine.WebKit);
client.setShowPageNumbers(false);
client.setPdfBookmarksSelectors("H1, H2");   // outline from H1/H2

// --- Convert a live URL to a local PDF ---
client.convertUrlToFile(url, localFile);
System.out.printf("Pages: %d%n", client.getNumberOfPages());

// --- Convert a raw HTML string to bytes (in-memory) ---
byte[] pdf = client.convertHtmlString("<h1>Hi</h1>");
UsageClient u = new UsageClient(apiKey);
System.out.println("Usage: " + u.getUsage(false));

require("SelectPdf.Api.php");

$client = new SelectPdf\Api\HtmlToPdfClient($apiKey);
$client->setPageSize(SelectPdf\Api\PageSize::A4);
$client->setPageOrientation(SelectPdf\Api\PageOrientation::Portrait);
$client->setMargins(0);
$client->setRenderingEngine(SelectPdf\Api\RenderingEngine::WebKit);
$client->setShowPageNumbers(false);
$client->setPdfBookmarksSelectors("H1, H2");  // outline from H1/H2

// --- Convert a live URL to a local PDF ---
$client->convertUrlToFile($url, $localFile);
echo "Pages: " . $client->getNumberOfPages() . "\n";

// --- Convert a raw HTML string to bytes ---
$pdf = $client->convertHtmlString("<h1>Hi</h1>");
$u = new \SelectPdf\Api\UsageClient($apiKey);
echo "Credits: " . $u->getUsage(false)["available"] . "\n";

import selectpdf

client = selectpdf.HtmlToPdfClient(apiKey)
client.setPageSize(selectpdf.PageSize.A4)
client.setPageOrientation(selectpdf.PageOrientation.Portrait)
client.setMargins(0)
client.setRenderingEngine(selectpdf.RenderingEngine.WebKit)
client.setShowPageNumbers(False)
client.setPdfBookmarksSelectors("H1, H2")  # outline from H1/H2

# --- Convert a live URL to a local PDF ---
client.convertUrlToFile(url, localFile)
print("Pages:", client.getNumberOfPages())

# --- Convert a raw HTML string to bytes (in-memory) ---
pdf = client.convertHtmlString("<h1>Hi</h1>")
usage = selectpdf.UsageClient(apiKey).getUsage()
print("Credits:", usage["available"])

var selectpdf = require('selectpdf');

var client = new selectpdf.HtmlToPdfClient(apiKey);
client.setPageSize('A4');
client.setPageOrientation('Portrait');
client.setMargins(0);
client.setRenderingEngine('WebKit');         // or 'Chromium'
client.setShowPageNumbers(false);
client.setPdfBookmarksSelectors('H1, H2');   // outline from H1/H2

// --- Convert a live URL to a local PDF ---
client.convertUrlToFile(url, localFile, function(err, file) {
    if (err) return console.error('Convert error:', err);
    console.log('Pages:', client.getNumberOfPages());

    var usage = new selectpdf.UsageClient(apiKey);
    usage.getUsage(false, function(e, d) {
        if (!e) console.log('Credits:', d['available']);
    });
});

require 'selectpdf'

client = SelectPdf::HtmlToPdfClient.new(api_key)
client.page_size = SelectPdf::PageSize::A4
client.page_orientation = SelectPdf::PageOrientation::PORTRAIT
client.margins = 0
client.rendering_engine = SelectPdf::RenderingEngine::WEBKIT
client.page_numbers = false
client.pdf_bookmarks_selectors = 'H1, H2'  # outline from H1/H2

# --- Convert a live URL to a local PDF ---
client.convert_url_to_file(url, local_file)
print "Pages: #{client.number_of_pages}\n"

# --- Convert a raw HTML string to bytes (in-memory) ---
pdf = client.convert_html_string('<h1>Hi</h1>')
usage = SelectPdf::UsageClient.new(api_key).get_usage(false)
print "Credits: #{usage['available']}\n"

use SelectPdf;
use JSON;

my $client = SelectPdf::HtmlToPdfClient->new($apiKey);
$client->setPageSize("A4");
$client->setPageOrientation("Portrait");
$client->setMargins(0);
$client->setRenderingEngine("WebKit");      # or "Chromium"
$client->setShowPageNumbers("False");
$client->setPdfBookmarksSelectors("H1, H2");  # outline

# --- Convert a live URL to a local PDF ---
$client->convertUrlToFile($url, $local_file);
print "Pages: " . $client->getNumberOfPages() . "\n";

# --- Convert a raw HTML string to bytes (in-memory) ---
my $pdf = $client->convertHtmlString("<h1>Hi</h1>");
my $u = SelectPdf::UsageClient->new($apiKey);
print "Credits: " . $u->getUsage(0)->{"available"} . "\n";