From c939af6bc920ccdd929a9b54aa7ba4e13d0f3a6f Mon Sep 17 00:00:00 2001
From: Florian Moser <git@famoser.ch>
Date: Tue, 2 Jan 2024 13:51:43 +0100
Subject: [PATCH] docs: Document resources proven useful for debugging

---
 resources/README.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/resources/README.md b/resources/README.md
index a9776088..fe75b5b7 100644
--- a/resources/README.md
+++ b/resources/README.md
@@ -12,4 +12,9 @@ https://docs.microsoft.com/en-us/typography/opentype/spec/featurelist
 # PDF
 https://www.datalogics.com/products/pdftools/pdf-checker/  
 https://www.pdf-online.com/osa/validate.aspx  
-https://docs.verapdf.org/validation/pdfa-part1/
\ No newline at end of file
+https://docs.verapdf.org/validation/pdfa-part1/
+https://www.pdfen.com/convert-to-pdfa
+
+```
+mutool clean -d input.pdf output.pdf
+```