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Find clear answers to common questions about Prefix Lines, including usage, output, and common issues.
Use this prefix lines tool to add the same prefix to each line of text. It is useful for comments, bullets, code formatting, labels, and list preparation.
Prefix Lines helps clean, transform, or inspect text directly in the browser, which is useful for writing, editing, SEO, and content workflows.
It adds the same prefix to every line in the text.
Put the prefix on the first line, then a blank line, then the text.
Yes. It processes every line in the block.
Yes. Short prefixes like //, #, -, or > work well.
Prefix Lines adds text at the start of each line, while Suffix Lines adds text at the end.
Prefix Lines helps clean, transform, or inspect text directly in the browser, which is useful for writing, editing, SEO, and content workflows.
Start by checking the input format, removing accidental spaces or unsupported characters, and comparing your input against the example pattern on the page.
Fix: Put the prefix first, then a blank line, then the body text.
Fix: This tool prefixes every line, including empty ones.
Fix: Use a short consistent prefix for cleaner results.
If you want to see realistic input and output patterns, open the examples page. If you want step-by-step usage guidance, open the guide page.
Open the main Prefix Lines page to test your own input and generate a live result.