Replace First

What Replace First does

Replaces the first occurrence of a find string. Unlike Find Replace this is first-only. Unlike Count Occurrence this rewrites. Empty text or find fails.

This URL is only for Replace First (developer · replace first). Replace the first match only. Other Developer tools on Tool-You look similar in the chrome, so the job definition below is the part that belongs to Replace First alone: Replaces the first occurrence of a find string. Unlike Find Replace this is first-only. Unlike Count Occurrence this rewrites. Empty text or find fails.

How to use Replace First

1. Keep this tab on Replace First (/developer/replace-first). Pasting into the wrong Developer tool (for example Find and Replace) changes the job.
2. Paste or type the input Replace First expects. Path hint: developer · replace first. Replace the first match only.
3. Apply the Replace First action only. Join With is a different transform (Join lines with part count.). Replaces the first occurrence of a find string. Unlike Find Replace this is first-only. Unlike Count Occurrence this rewrites. Empty text or find fails.
4. Copy the output of Replace First if you need it elsewhere. Size/complexity still follows: First match only. Empty fails.
5. If the text job is actually Replace literal text., leave Replace First and open Find and Replace.

When not to use Replace First

Skip Replace First when a neighbor tool matches better — start with Find and Replace or Join With — or when the description already warns the job will fail. In the tool’s own words: Replaces the first occurrence of a find string. Unlike Find Replace this is first-only. Unlike Count Occurrence this rewrites. Empty text or find fails.

Questions about Replace First

What does Replace First do that other Developer pages on this site do not?

Replaces the first occurrence of a find string. Unlike Find Replace this is first-only. Unlike Count Occurrence this rewrites. Empty text or find fails. Short version: Replace the first match only.

Does Replace First upload my file or text to Tool-You servers?

No. Replace First runs in this browser tab. Files stay on the device. Limit note: First match only. Empty fails.

Should I use Find and Replace instead of Replace First?

Use Replace First when you need Replace the first match only. Use Find and Replace when you need Replace literal text. They share a category (Developer) but not the same job.

What are the limits of Replace First?

First match only. Empty fails. Also: Replaces the first occurrence of a find string. Unlike Find Replace this is first-only. Unlike Count Occurrence this rewrites. Empty text or find fails.