What does Shift Lines Up do that other Developer pages on this site do not?

Moves the first line to the end; reports line count. Short version: Rotate lines up with line count.

Does Shift Lines Up upload my file or text to Tool-You servers?

No. Shift Lines Up runs in this browser tab. Files stay on the device. Limit note: Empty input fails.

Should I use Shift Lines Down instead of Shift Lines Up?

Use Shift Lines Up when you need Rotate lines up with line count. Use Shift Lines Down when you need Rotate lines down with line count. They share a category (Developer) but not the same job.

What are the limits of Shift Lines Up?

Empty input fails. Also: Moves the first line to the end; reports line count.

Shift Lines Up

Rotate lines up with line count.

Moves the first line to the end; reports line count.

What Shift Lines Up does

Moves the first line to the end; reports line count.

Shift Lines Up sits in the Developer group on purpose. It is not Shift Lines Down (Rotate lines down with line count.) and not Drop First Line (Remove the first line.). Choose this page when you need Rotate lines up with line count. If you stretch Shift Lines Up into a neighbor’s job, the result will look wrong even though the site chrome looks the same.

How to use Shift Lines Up

Keep this tab on Shift Lines Up (/developer/shift-lines-up). Pasting into the wrong Developer tool (for example Shift Lines Down) changes the job.
Paste or type the input Shift Lines Up expects. Path hint: developer · shift lines up. Rotate lines up with line count.
Apply the Shift Lines Up action only. Drop First Line is a different transform (Remove the first line.). Moves the first line to the end; reports line count.
Copy the output of Shift Lines Up if you need it elsewhere. Size/complexity still follows: Empty input fails.
If the text job is actually Rotate lines down with line count., leave Shift Lines Up and open Shift Lines Down.

When not to use Shift Lines Up

Skip Shift Lines Up when a neighbor tool matches better — start with Shift Lines Down or Drop First Line — or when the description already warns the job will fail. In the tool’s own words: Moves the first line to the end; reports line count.

Questions about Shift Lines Up

What does Shift Lines Up do that other Developer pages on this site do not?: Moves the first line to the end; reports line count. Short version: Rotate lines up with line count.
Does Shift Lines Up upload my file or text to Tool-You servers?: No. Shift Lines Up runs in this browser tab. Files stay on the device. Limit note: Empty input fails.
Should I use Shift Lines Down instead of Shift Lines Up?: Use Shift Lines Up when you need Rotate lines up with line count. Use Shift Lines Down when you need Rotate lines down with line count. They share a category (Developer) but not the same job.
What are the limits of Shift Lines Up?: Empty input fails. Also: Moves the first line to the end; reports line count.