Is there a file size limit?

No practical limit for most operations.

Results are generated using standard algorithms for maximum accuracy.

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chmod Calculator — online

Calculate Unix file permissions in octal notation.

Type, paste, or upload your content.

Result appears instantly in your browser.

Copy the result or download your file.

Generate Apache .htaccess rules for redirects and security.

Parse cron expressions with plain English explanations.

Generate a robots.txt file with a visual builder.