Robots.txt Generator

Robots.txt Generator: Build a Correct robots.txt File, Free, Right in Your Browser

Every crawlable website benefits from a correct robots.txt file, yet it's easy to get wrong by hand: one misplaced slash on a Disallow line can quietly hide your whole site from search engines, and there's no error message when it happens, only a slow drop in organic traffic you notice weeks later. This tool is a real robots.txt generator: it builds the file's exact required syntax from simple rows you fill in, so the structure is correct even if you've never written one before.

The output is ordinary, standards-correct text, not a black box. Each User-agent block lists its Disallow and Allow paths plainly, a Sitemap line is added only if you provide one, and the live preview updates on every keystroke so you always see the exact file you're about to download, not a placeholder. Nothing about the rules you build, or any file you paste into the Pro validator, ever leaves your browser.

1How the Generator Builds Your robots.txt

Simple Mode starts you with one User-agent: * block, the one that applies to every crawler that doesn't have a more specific block of its own. Each row lets you choose Disallow or Allow and type a path, like /wp-admin/ or /private/; leave a path blank and that row is skipped from the final output rather than written as an empty, meaningless line. Add your sitemap's full URL and a Sitemap: line is appended automatically. If you haven't added any rules at all, the generator still outputs a valid, explicit Disallow: line with nothing after the colon, which in robots.txt syntax means "block nothing" rather than leaving crawlers to guess at an empty block.

2What Pro Mode Adds: Per-Bot Rules, Presets & Validation

Pro Mode is built for sites that need more than one blanket rule. You can add a dedicated block for Googlebot, Bingbot, or any custom-named bot (useful for naming a specific AI crawler, since this site's separate AI Crawler Access Generator handles the common AI-bot names by default), each with its own Allow/Disallow rows and its own crawl-delay value, since not every crawler should be throttled the same way. Four presets, WordPress Default, Block /wp-admin/ Only, E-Commerce Filtered-URL Blocking, and Block Staging / Admin Paths, pre-fill a block with commonly needed rules that stay fully editable after you apply them. A syntax validator parses any robots.txt text, your generated one or one you paste in, and flags real, specific mistakes: a Disallow or Allow line with no User-agent above it, a bare Disallow: / that blocks everything, and a path that's both Allowed and Disallowed in the same block.

3Simple vs Pro

Simple Mode covers the version of this task most sites actually need: one set of rules and a sitemap line. Pro Mode, currently free to use, adds the controls that matter once a site has more than one crawler to think about, a CMS with known paths to lock down, or a past mistake it wants checked before it ships again.

4Common Reasons People Use a Robots.txt Generator

None of these need a developer on call or a paid SEO platform, just a few paths to block and a couple of minutes. That's the gap this tool fills: a direct, correct robots.txt generator for the moment you need one, with a validator on hand for the moment you need to double-check one that already exists.

5Why a Bare "Disallow: /" Is the Mistake Worth Checking For

The single most damaging robots.txt mistake is also one of the easiest to make by accident: a stray Disallow: / left under User-agent: *, often copied over from a staging environment where blocking everything was intentional. It tells every general-purpose crawler it covers to request nothing at all, which can take an entire site out of search results with no warning and no error message, only a gradual drop in traffic that's easy to misdiagnose as something else entirely. This tool's Pro syntax validator checks for exactly this pattern, along with a Disallow or Allow line placed before any User-agent line (which crawlers can't attribute to a specific bot) and a path that's both Allowed and Disallowed in the same block.

6Frequently Asked Questions