Does Mask Middle upload my file or text to Tool-You servers?

No. Mask Middle runs in this browser tab. Files stay on the device. Limit note: Keep start/end; middle masked. Empty fails.

Should I use Slice Text Range instead of Mask Middle?

Use Mask Middle when you need Mask the middle of a string. Use Slice Text Range when you need Slice text by start/end indexes. They share a category (Developer) but not the same job.

Mask Middle

Mask the middle of a string.

Keeps start/end characters and masks the middle. Unlike Slice Text Range this redacts. Keep lengths must leave a middle. Empty fails.

What Mask Middle does

Keeps start/end characters and masks the middle. Unlike Slice Text Range this redacts. Keep lengths must leave a middle. Empty fails.

Mask Middle sits in the Developer group on purpose. It is not Slice Text Range (Slice text by start/end indexes.) and not Truncate Text (Cut text to a max length.). Choose this page when you need Mask the middle of a string. If you stretch Mask Middle into a neighbor’s job, the result will look wrong even though the site chrome looks the same.

How to use Mask Middle

Keep this tab on Mask Middle (/developer/mask-middle). Pasting into the wrong Developer tool (for example Slice Text Range) changes the job.
Paste or type the input Mask Middle expects. Path hint: developer · mask middle. Mask the middle of a string.
Apply the Mask Middle action only. Truncate Text is a different transform (Cut text to a max length.). Keeps start/end characters and masks the middle. Unlike Slice Text Range this redacts. Keep lengths must leave a middle. Empty fails.
Copy the output of Mask Middle if you need it elsewhere. Size/complexity still follows: Keep start/end; middle masked. Empty fails.
If the text job is actually Slice text by start/end indexes., leave Mask Middle and open Slice Text Range.

When not to use Mask Middle

Skip Mask Middle when a neighbor tool matches better — start with Slice Text Range or Truncate Text — or when the description already warns the job will fail. In the tool’s own words: Keeps start/end characters and masks the middle. Unlike Slice Text Range this redacts. Keep lengths must leave a middle. Empty fails.

Questions about Mask Middle

What does Mask Middle do that other Developer pages on this site do not?: Keeps start/end characters and masks the middle. Unlike Slice Text Range this redacts. Keep lengths must leave a middle. Empty fails. Short version: Mask the middle of a string.
Does Mask Middle upload my file or text to Tool-You servers?: No. Mask Middle runs in this browser tab. Files stay on the device. Limit note: Keep start/end; middle masked. Empty fails.
Should I use Slice Text Range instead of Mask Middle?: Use Mask Middle when you need Mask the middle of a string. Use Slice Text Range when you need Slice text by start/end indexes. They share a category (Developer) but not the same job.
What are the limits of Mask Middle?: Keep start/end; middle masked. Empty fails. Also: Keeps start/end characters and masks the middle. Unlike Slice Text Range this redacts. Keep lengths must leave a middle. Empty fails.