robots.txt Tester online — free

Why use this tool?

• Instant browser results
• Copy & paste friendly
• No sign-up

How it works

1. 1Open the robots.txt Tester page — no registration required.
2. 2Paste or type your input into the editor.
3. 3Adjust settings and review the live preview (instant browser results).
4. 4Copy the output or download the processed file to your device.

Common use cases

• Debug API payloads and config files during development
• Format JSON, XML, SQL, or CSS before committing to git
• Convert between encodings when integrating systems
• Share a reproducible result with teammates via copy-paste

Tips & comparisons

• Compared with desktop apps, this online robots.txt tester starts instantly and needs no updates — bookmark it for repeat tasks.
• Cloud upload services may store copies of your files; this browser tool keeps processing local when the feature allows it.
• For batch or enterprise workflows, combine this tool with Tentaco studios or export results to your own pipeline.

Privacy & data handling

Tentaco runs this tool in your browser whenever possible. Text and structured input you paste are handled in the page session unless the tool explicitly fetches remote data. Close the tab or clear the page after use on shared computers. Features that call external APIs (such as URL fetchers) only send the data required for that request.