Environment variable size limit removed for Serverless Functions
June 12, 2026
You can now use as many environment variables as your Serverless Functions need. The 4KB total size limit on environment variables no longer applies to functions running on the current Netlify Functions runtime.
This limit was a common source of friction. Teams with several API keys, connection strings, or feature flags could quietly bump into the cap and see their functions fail to deploy or run, often with confusing errors. With the limit gone, you no longer have to ration space or work around the ceiling for the configuration your functions legitimately need.
The limit still applies to functions running in Lambda compatibility mode. If your functions are using Lambda compatibility mode and you want to remove the size limit entirely, consider upgrading to the current Netlify Functions runtime.
Learn more about environment variables in Netlify Functions in our documentation.