What is this RSA duplicate detector?
A free, browser-based tool for Google Ads marketers. Paste the headlines and descriptions you plan to put into a responsive search ad (RSA), one per line, and it flags exact duplicates (case- and space-insensitive) plus optional near-duplicates — typos and minor wording variants caught with fuzzy matching. It then outputs the deduped set so you don't waste any of your 15 headline or 4 description slots on copy that says the same thing. Since redundant assets don't add ad combinations or improve Ad Strength, removing them frees room for genuinely different angles. Everything runs locally in your browser, so nothing is uploaded.
How to use it
- Paste your RSA headlines (and descriptions), one asset per line, into the box on the left.
- Leave fuzzy matching on to also catch near-duplicates, or turn it off for exact matches only.
- Review the flagged groups on the right, then copy the deduped set back into Google Ads.
Common use cases
- Cleaning a long list of brainstormed headlines before pasting them into an RSA.
- Catching near-identical assets that quietly lower your Ad Strength and waste slots.
- Merging headline lists from multiple teammates or spreadsheets without duplicating copy.