Does Stereo Widen upload my file or text to Tool-You servers?

No. Stereo Widen runs in this browser tab. Files stay on the device. Limit note: Audio only. extrastereo. Output MP3. Max 100 MB.

Should I use Swap Stereo instead of Stereo Widen?

Use Stereo Widen when you need Widen stereo image, then MP3. Use Swap Stereo when you need Swap left and right channels, then MP3. They share a category (Audio) but not the same job.

Stereo Widen

Widen stereo image, then MP3.

Applies extrastereo, then MP3. Unlike Swap Stereo this widens, not swaps channels. Unlike Mono Audio this keeps stereo. First run downloads the engine.

What Stereo Widen does

Applies extrastereo, then MP3. Unlike Swap Stereo this widens, not swaps channels. Unlike Mono Audio this keeps stereo. First run downloads the engine.

Practical limit for Stereo Widen: Audio only. extrastereo. Output MP3. Max 100 MB. That is why output can differ from heavy desktop Audio software. Read the tool-specific note again: Applies extrastereo, then MP3. Unlike Swap Stereo this widens, not swaps channels. Unlike Mono Audio this keeps stereo. First run downloads the engine.

How to use Stereo Widen

Stay on this Stereo Widen page (/audio/stereo-widen). Do not switch to Swap Stereo unless you actually want Swap left and right channels, then MP3..
Add the file type Stereo Widen accepts. Hint from the path: audio · stereo widen. Widen stereo image, then MP3.
Set only the options that match Stereo Widen. Neighbor Stereo to Mono does something else (Downmix to one channel and export MP3.). Tool note: Applies extrastereo, then MP3. Unlike Swap Stereo this widens, not swaps channels. Unlike Mono Audio this keeps stereo. First run downloads the engine.
Run Stereo Widen in this tab. Browser memory still applies: Audio only. extrastereo. Output MP3. Max 100 MB.
Download or copy the result from Stereo Widen. If it is the wrong job, open Swap Stereo instead.

When not to use Stereo Widen

Skip Stereo Widen when a neighbor tool matches better — start with Swap Stereo or Stereo to Mono — or when the description already warns the job will fail. In the tool’s own words: Applies extrastereo, then MP3. Unlike Swap Stereo this widens, not swaps channels. Unlike Mono Audio this keeps stereo. First run downloads the engine.

Questions about Stereo Widen

What does Stereo Widen do that other Audio pages on this site do not?: Applies extrastereo, then MP3. Unlike Swap Stereo this widens, not swaps channels. Unlike Mono Audio this keeps stereo. First run downloads the engine. Short version: Widen stereo image, then MP3.
Does Stereo Widen upload my file or text to Tool-You servers?: No. Stereo Widen runs in this browser tab. Files stay on the device. Limit note: Audio only. extrastereo. Output MP3. Max 100 MB.
Should I use Swap Stereo instead of Stereo Widen?: Use Stereo Widen when you need Widen stereo image, then MP3. Use Swap Stereo when you need Swap left and right channels, then MP3. They share a category (Audio) but not the same job.
What are the limits of Stereo Widen?: Audio only. extrastereo. Output MP3. Max 100 MB. Also: Applies extrastereo, then MP3. Unlike Swap Stereo this widens, not swaps channels. Unlike Mono Audio this keeps stereo. First run downloads the engine.