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Amazon SNS now supports message payloads up to 1 MiB

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AWS·Sep 18, 2026, 03:00 PMFeatureAI-assisted summary

Summary

Increases SNS message payload limit from 256 KiB to 1 MiB (4× larger).
Adds new MaximumMessageSize topic attribute for Standard and FIFO topics.
Supports larger payloads with SQS, Kinesis Data Firehose, and Lambda subscriptions (up to 100 per topic).

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Official source Last checked Sep 19, 2026, 5:04 PM

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