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Found a bug, want a format added, or have a question? Use any of the channels below — replies usually within a couple of days.

Before you write about a conversion problem

It helps enormously to include: which tool page you were on, your browser and version, the format and rough size of the file, and what happened (an error message, a blank result, a wrong colour…). Because nothing is uploaded, we can't see your file — so a description is all we have to go on.