About this tool
Enter a subject to count its characters and review the length warning.
Review the result for your task before using it elsewhere.
The 60-character guideline does not predict inbox placement or exact display width.
Frequently asked questions
How do I use this tool?
Enter a subject to count its characters and review the length warning. Review the result for your task before using it elsewhere.
What limitations should I check first?
The 60-character guideline does not predict inbox placement or exact display width.