Documentation

How to use the API, and what to do when an image does not compress the way you expected.

• REST API reference

  Compress images from your own code. Authenticate with an API key, post a file, poll the job, download the result from a signed URL.

• Troubleshooting

  Why an image did not get smaller, why a PNG is still huge, why AVIF is slow, and what the error codes mean. The common problems, with the actual causes.