Free tools

Free Meta Robots Builder & Validator

Create valid robots directives like noindex, nofollow, max-snippet, and validate token combinations.

Copy-paste outputs

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Tool 01

Meta Robots Builder + Validator

Build robots directives and validate noindex/nofollow combinations before publish.

Meta Robots Tag Builder + Validator

Build deterministic robots directives and validate custom combinations.

Index mode

Follow mode

max-snippet (optional)

max-video-preview (optional)

max-image-preview (optional)

noarchivenosnippetnoimageindex

Generated meta tag

Custom validator

{
  "errors": [],
  "warnings": [],
  "normalized": "index, follow, max-snippet:-1, max-image-preview:large"
}

How it works

Meta Robots Tag Builder + Validator: methodology and worked example

How this tool computes its result

The builder composes a directive string from index/noindex and follow/nofollow selects plus optional `noarchive`/`nosnippet`/`noimageindex` checkboxes and free-text `max-snippet`/`max-video-preview`/`max-image-preview` values, joined with ", " — pure string assembly, no validation is applied to it. The separate validator parses whatever text is typed into its own textarea: splits on commas, lowercases and trims each token, dedupes with a `Set`, flags direct conflicts (`index`+`noindex`, `follow`+`nofollow`) as errors, checks that `max-snippet`/`max-video-preview` values parse as integers and that `max-image-preview` is one of `none`/`standard`/`large`, flags any token outside the known directive set as an "Unknown directive" warning, and warns if both `nosnippet` and a `max-snippet` value are present together since `nosnippet` overrides it.

Worked example

Default validator text `"index, follow, max-snippet:-1, max-image-preview:large"` → 4 unique tokens, no index/noindex or follow/nofollow conflict, `max-snippet:-1` parses to a valid integer (negative values are accepted, `-1` conventionally means "no limit"), `max-image-preview:large` is in the allowed enum → result `{"errors":[],"warnings":[],"urlCount"` — actually `{"errors":[],"warnings":[],"normalized":"index, follow, max-snippet:-1, max-image-preview:large"}`.

When not to use this tool

The builder and validator are two separate, unconnected pieces of state — changing a builder dropdown never updates the validator textarea, so you cannot use this tool to validate what the builder just generated without manually copying the string across.

Common mistakes

- Separating directives with spaces instead of commas — the validator splits strictly on `,`, so `"index follow"` is parsed as one unrecognized token rather than two separate directives.
- Entering a non-numeric `max-snippet`/`max-video-preview` value like "unlimited" — `Number.parseInt` returns `NaN` and is correctly flagged, but a value like "10px" parses to `10` (parseInt stops at the first non-digit character) and passes validation silently.
- Assuming the validator checks a live page's actual robots meta tag — it only validates whatever text is typed or pasted into its own textarea, with no fetching involved.

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