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SPCX Tools

Add Text to Lines

Quickly add prefixes, suffixes, or automatic line numbers to multiple lines of text at once.

Runs locally — files never leave your device

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How to use Add Text to Lines

  1. 1Paste or type your text into the input box.
  2. 2Enter the text you want to add at the beginning in the Prefix field, or at the end in the Suffix field.
  3. 3Use {n} in your prefix or suffix to insert automatic line numbers, adjusting the starting number if needed.
  4. 4Choose whether to skip empty lines so they remain blank and do not affect the numbering sequence.
  5. 5Copy the modified text or download it as a text file.

A fast way to add text to each line

Editing large blocks of text manually is tedious and prone to errors. Whether you need to format a list, prepare data for a database, or generate code snippets, doing it line by line takes too much time. This tool automates the process, allowing you to instantly add text to each line of your document.

You can prepend text to lines, append text to the end, or do both simultaneously. Because the tool runs entirely in your browser using local JavaScript, your text is never uploaded to a server. You can safely format sensitive customer data, internal code, or private notes without worrying about data privacy.

Using the line prefix tool and suffix options

The interface is designed to be straightforward while offering powerful formatting capabilities. By utilizing the input fields and presets, you can transform plain text into structured data in seconds.

Add prefix to lines: Any characters you type into the Prefix field will be inserted at the very beginning of every line. This is ideal for adding bullet points, indentation, or commenting out blocks of code (such as adding // or # ).

Add suffix to each line: Characters entered into the Suffix field are appended to the very end of every line. This is commonly used to add punctuation, such as commas or semicolons, to the end of data rows.

Quick Presets: If you need standard formatting, the tool includes built-in presets that automatically fill the prefix and suffix fields for you:

  • Bullets: Adds a standard bullet point (• ) to the start of each line.
  • Numbers: Sets up sequential numbering ({n}. ).
  • Quotes: Wraps each line in double quotes and adds a trailing comma ("text",), perfect for building arrays.
  • HTML Tags: Wraps each line in list item tags (<li> and </li>).
  • Markdown: Prepends a Markdown task list checkbox (- [ ] ) to every line.

Smart line numbering

One of the most powerful features of this tool is the ability to automatically number your lines using the {n} placeholder. Whenever you include {n} in either the prefix or suffix field, the tool replaces it with the current line number.

You have full control over how this numbering behaves:

  • Custom starting numbers: By default, numbering starts at 1. If you are continuing a list from a previous document, you can change the "Start number" field to 10, 50, or any other integer.
  • Handling empty lines: The "Skip empty lines" checkbox is enabled by default. When checked, the tool ignores blank lines (or lines containing only spaces). It will not add prefixes or suffixes to them, and more importantly, it pauses the {n} counter. This ensures that if you have a double-spaced list, your items will be numbered sequentially (1, 2, 3) rather than skipping numbers for the blank spaces (1, 3, 5).

Common use cases for formatting text

Preparing SQL queries and code arrays Developers frequently need to convert a column of raw data—like user IDs, email addresses, or product codes—into a format that can be used in code. By using the line prefix tool to add a single quote (') and the suffix tool to add a quote and a comma (',), a plain list is instantly ready to be pasted into an SQL IN (...) clause or a JavaScript array.

Writing HTML and Markdown Web developers and technical writers can save time by automating repetitive tags. Instead of typing <li> and </li> around fifty list items, you can paste the plain text list, apply the HTML preset, and copy the fully formatted code. Similarly, converting meeting notes into a Markdown checklist takes only a single click.

Cleaning up and formatting documents If you are preparing a document for publication or plain-text email distribution, you might need to add specific indentation or quotation marks. You can prepend a greater-than sign (> ) to blockquote an entire email thread, or add spaces to indent a block of text uniformly.

Related text formatting tools

If your text requires further cleanup before or after adding prefixes and suffixes, these local browser tools can help streamline your workflow:

  • Remove Line Breaks: Quickly strip out unwanted line breaks to combine your text into a single paragraph or a comma-separated string.
  • Sort Lines: Alphabetize your list or sort it by length before you apply numbers or formatting.
  • Find and Replace: Swap out specific words, characters, or formatting errors across your entire document instantly.

Frequently asked questions

How do I add line numbers to my text?
Type {n} in the prefix or suffix box. For example, setting the prefix to "{n}. " will number your lines like "1. ", "2. ", and so on. You can change the starting number using the Start field.
What does the "Skip empty lines" option do?
When enabled, any blank lines (or lines containing only spaces) in your input will be left completely blank in the output. If you are using {n} for numbering, the counter will pause on empty lines, ensuring your numbered list stays sequential.
Can I add both a prefix and a suffix at the same time?
Yes, you can fill in both fields. The tool will prepend the prefix and append the suffix to every line simultaneously.
Is my text sent to a server?
No. This tool processes everything locally in your browser. Your text is never uploaded, making it completely safe for sensitive data, confidential documents, or proprietary code.
How do I wrap my lines in quotes for programming?
You can click the "Quotes" preset, or manually enter a double quote (") in the prefix box and a quote followed by a comma (",) in the suffix box. This instantly formats a plain list into a format suitable for arrays or SQL queries.

Related tools

Remove Line BreaksFix text with broken lines — keep the paragraphs, join the lines, or turn a list into a comma-separated line.Sort LinesPut any list in alphabetical, numerical or random order in one click.Find and ReplaceReplace every occurrence of a word or pattern in your text — with case, whole-word and regex options.Binary TranslatorTurn words into 0s and 1s — and decode binary, hex, decimal or octal back into readable text.Case ConverterChange text to any letter case — from Title Case to snake_case — and see every format at once.Character CounterCount characters as you type and see instantly whether your text fits each platform's limit.