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The more specific the report, the faster it turns into a fix. Please include:

• The name of the tool and the address of its page.
• Your browser and its version, and your operating system (for example Chrome 130 on Windows 11, or Safari on iPhone).
• What kind of file you used: format, approximate size, and where it came from (a phone camera, a scanner, an export from a specific program).
• What you expected to happen and what happened instead, with the exact wording of any error message.
• A screenshot if the problem is visual.

If the file itself is needed to reproduce the problem and it contains nothing confidential, you can attach it. Please do not send documents with personal data, passwords or anything you would not want in an inbox; describe the file instead, or reproduce the problem with a harmless sample.

If a format you work with is missing, or a tool is almost right but lacks one option, say which format or option and what you need it for. Requests that come with a concrete use are much easier to prioritise than a general wish.

If you have found a security weakness in the site or in the server tools, please put "Security" in the subject line and describe what you found. Please do not test it against other people's data or try to disrupt the service. Reports are taken seriously and acknowledged as quickly as possible.

Embedding the tools in your own site, linking arrangements, press questions and anything that does not fit above also go to the same address. Please note that we do not sell advertising directly and do not offer paid placements inside the tools.