Any PDF in. Archival PDF/A out.

using LMKit.Document.Pdf;

// One call: repair fonts and colour, strip prohibited constructs,
// rebuild metadata, rewrite as PDF/A-2b.
var report = PdfAConverter.ConvertToFile("invoice.pdf", "invoice_pdfa.pdf");

Console.WriteLine($"Conforms:      {report.Conforms}");
Console.WriteLine($"Pages:         {report.PageCount}");
Console.WriteLine($"Fixes applied: {report.FixesApplied}");

using LMKit.Document.Pdf;

// Target PDF/A-3b and report violations instead of rasterizing.
var options = new PdfAConversionOptions
{
    Level    = PdfAConformanceLevel.PdfA3b,
    Fallback = PdfAConversionOptions.FallbackBehavior.ReportOnly,
    Password = "s3cret",   // encrypted input; output is always unencrypted
};

var report = await PdfAConverter.ConvertToFileAsync(
    "contract.pdf", "contract_pdfa.pdf", options);

if (!report.Conforms)
{
    Console.WriteLine($"Unresolved: {report.UnresolvedViolations}");
}

using LMKit.Document.Pdf;

// Bytes in, conforming bytes plus report out. No temp files.
byte[] source = await httpClient.GetByteArrayAsync(documentUrl);

var result = await PdfAConverter.ConvertToBytesAsync(source);

await blobStore.UploadAsync(result.Data);
Console.WriteLine($"Raster fallback: {result.Report.UsedRasterFallback}");