Ensure Prefix

What Ensure Prefix does

Prepend prefix if missing; also had flag.

The interactive controls for Ensure Prefix load after this article so crawlers still read the instructions. Path /developer/ensure-prefix is the canonical address. Work happens on this device; Tool-You does not take a copy of the file or pasted text for Ensure Prefix.

How to use Ensure Prefix

1. Keep this tab on Ensure Prefix (/developer/ensure-prefix). Pasting into the wrong Developer tool (for example Ensure Suffix) changes the job.
2. Paste or type the input Ensure Prefix expects. Path hint: developer · ensure prefix. Ensure prefix with had-flag.
3. Apply the Ensure Prefix action only. Prefix Lines is a different transform (Prefix lines with counts.). Prepend prefix if missing; also had flag.
4. Copy the output of Ensure Prefix if you need it elsewhere. Size/complexity still follows: Empty fails.
5. If the text job is actually Ensure suffix with had-flag., leave Ensure Prefix and open Ensure Suffix.

When not to use Ensure Prefix

Skip Ensure Prefix when a neighbor tool matches better — start with Ensure Suffix or Prefix Lines — or when the description already warns the job will fail. In the tool’s own words: Prepend prefix if missing; also had flag.

Questions about Ensure Prefix

What does Ensure Prefix do that other Developer pages on this site do not?

Prepend prefix if missing; also had flag. Short version: Ensure prefix with had-flag.

Does Ensure Prefix upload my file or text to Tool-You servers?

No. Ensure Prefix runs in this browser tab. Files stay on the device. Limit note: Empty fails.

Should I use Ensure Suffix instead of Ensure Prefix?

Use Ensure Prefix when you need Ensure prefix with had-flag. Use Ensure Suffix when you need Ensure suffix with had-flag. They share a category (Developer) but not the same job.

What are the limits of Ensure Prefix?

Empty fails. Also: Prepend prefix if missing; also had flag.