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Free · API · MCPToolYour platform

Use Google Ads RSA Preview three ways

The free Google Ads RSA Preview on this page works in your browser. The same workflow is available via REST API for apps and via MCP for Cursor, Claude, and other agents — one API key, one plan, one quota. This tool is part of the marketing-apis module under Marketing Tools.

  • Free in browserUse Google Ads RSA Preview here — no account required.
  • REST APICall from your server with X-Api-Key.
  • MCP for agentsConnect Cursor or Claude to ToolYour MCP with the same key.
  • 1. Get an API keySign in and open Dashboard → API Keys (works for REST and MCP).
  • 2. Call or connectUse the REST API from your server, or paste the MCP URL into your agent config.
  • 3. Same qualityOutput matches the free web tool across all three surfaces.
Manage API keysMCP setupAPI referenceCreate free account

What is Google Ads RSA Preview?

Before uploading RSA assets, you need length validation and a rough desktop/mobile preview. ToolYour Google Ads RSA Preview accepts headlines[] and descriptions[], checks 30/90 character limits, and shows a simple combined preview. It is not Google’s live SERP render or an auction simulator. Same route via REST and MCP (POST /api/v1/marketing-apis/google-ads-rsa-preview).

What are common questions about Google Ads RSA Preview?

How many headlines do I need?

Google allows up to 15 headlines / 4 descriptions in Ads; this tool validates whatever you paste — at least one of each is required.

Is the preview pixel-perfect?

No. It concatenates sample headlines/descriptions for layout intuition only. Final assembly is controlled by Google.

Can I use this via API or MCP in a launch playbook?

Yes — same route via REST and MCP with one API key. Agents can validate a headline/description batch before flagging it for human approval.

What are the key features of Google Ads RSA Preview?

Per-asset length status

Each headline and description gets ok/length/limit.

Desktop & mobile sketch

Simple text preview to spot empty or awkward combinations.

How do you use Google Ads RSA Preview?

Paste RSA headlines and descriptions

One per line or as an array via API.

Fix out-of-range assets

Trim to 30/90, then upload to Google Ads.

Why this tool exists

Before uploading Responsive Search Ad assets, you want to see roughly how headlines and descriptions might combine — and confirm every asset fits the 30/90 character limits — without opening Ads Manager and running a real upload. Google Ads RSA Preview does both in one paste.

Problems it solves

RSA assets are validated one field at a time in Ads Manager's editor, which is slow when reviewing 15 headlines and 4 descriptions from a spreadsheet. This tool checks the whole set at once and gives a rough combined preview so obviously awkward or empty combinations get caught early.

Common use cases

  • Agency campaign build: validating a client's full RSA asset list against 30/90 limits before the account team uploads it.
  • In-house PPC: sanity-checking a new batch of headlines drafted in a doc before pasting into Ads Manager.
  • QA before spend: catching over-length assets that would otherwise get silently truncated at serve time.
  • Agent/MCP: an agent pre-validating headline variants from a template tool before flagging them for human review.

Honest scope

The preview concatenates sample headlines and descriptions for layout intuition only — it is not Google's live SERP render, does not simulate the ad auction, and does not predict which combinations Google's system will actually choose to show. Final assembly and rendering stay controlled by Google.

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