## Use a supported browser

Novacut plays your edit with WebCodecs. Use a current version of **Chrome**, **Edge** or **Brave** on a computer. Safari and Firefox, and browsers on iPhone or iPad, show an "Unsupported browser" message.

## An upload stalls or fails

- Keep the tab open until the upload reaches 100%. After that, processing continues on our servers.
- If an upload stops, click **Retry upload** on the file. It picks up where it left off.
- A file that won't upload may be in an unsupported format. See [supported files](/help/how-to-upload-and-manage-footage).

## Footage stays on "Analyzing"

- Analysis takes a few minutes per clip, longer for long files. The progress panel shows what's happening and an estimate.
- Temporary failures are retried automatically. If a file shows an error, click **Try Again**.
- If a file is still stuck after 30 minutes, contact support@novacut.ai with the project link.

## The preview won't play or looks wrong

- Wait for "Buffering…" to finish, especially after a big change.
- Reload the page.
- Make sure you're using Chrome, Edge or Brave.
- Some changes, such as upscaling, only appear in the rendered MP4, not in the preview.

## Chat says the reply was interrupted

Click **Dismiss** and send the request again. Your timeline keeps any changes that were already made.

## Export is unavailable

- Exports wait until your original files finish backing up.
- Once your trial is used up, exports need a paid plan.
- Only one export runs at a time.

## Still stuck?

Click **Feedback** at the top of the page, or email support@novacut.ai with your project link and what you expected to happen.