MTU overhead calculator
Paste JSON with mtu and layers [{name, bytes}].
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Process up to 500000 input characters and 20000 records locally. Reports export completely up to 40 million characters and 500000 CSV records. Analysis is local with a 10-second timeout. Preview tables show the first 200 rows; your data is not uploaded. Up to 500,000 characters. Review the settings before running.
Your result
How to use MTU overhead calculator
- Paste text or JSON in the documented format.
- Review the bounded report and explicit assumptions.
- Download complete JSON or CSV.
Useful next steps
Know the interpretation limits
Paste JSON with mtu and layers [{name, bytes}]. Usable payload is MTU minus the supplied encapsulation bytes; defaults, padding and path discovery are not inferred.
Keep the complete report
Search and sort apply to the first 200 rows. Download JSON or CSV for every row and the assumptions.