# Using the Amazon S3 Transfer Acceleration Speed Comparison tool
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You can use the [Amazon S3 Transfer Acceleration Speed Comparison tool](https://s3-accelerate-speedtest.s3-accelerate.amazonaws.com/en/accelerate-speed-comparsion.html) to compare accelerated and non-accelerated upload speeds across Amazon S3 Regions. The Speed Comparison tool uses multipart uploads to transfer a file from your browser to various Amazon S3 Regions with and without using Transfer Acceleration.

You can access the Speed Comparison tool by using either of the following methods:
+ Copy the following URL into your browser window, replacing `region` with the AWS Region that you are using (for example, `us-west-2`) and `amzn-s3-demo-bucket` with the name of the bucket that you want to evaluate: 

  `https://s3-accelerate-speedtest.s3-accelerate.amazonaws.com/en/accelerate-speed-comparsion.html?region=region&origBucketName=amzn-s3-demo-bucket` 

  For a list of the Regions supported by Amazon S3, see [Amazon S3 endpoints and quotas](https://docs.aws.amazon.com/general/latest/gr/s3.html) in the *AWS General Reference*.
+ Use the Amazon S3 console.