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 Concatenate Text Tool

Concatenate text from two separate blocks into one combined result, using any separator you choose. Merge Text A and Text B as whole blocks, or join them line by line so each pair of lines is combined with the separator between them. Everything runs instantly in your browser.

⚙️ Concatenate options
Type \n for a newline or \t for a tab.

Concatenate Text Tool

The Concatenate Text tool lets you merge two separate blocks of text, Text A and Text B, into a single combined result. Add a custom separator between them, and choose whether to join the two blocks as whole chunks or pair them up line by line—ideal for combining lists, merging column-style data, or building combined strings for code and spreadsheets.

⭐ What Does This Tool Do?

  • Combines Text A and Text B into one output using a separator you define
  • Supports a free-text separator, including typed \n for a newline or \t for a tab
  • Offers a "Join line by line" mode that pairs each line of Text A with the matching line of Text B
  • Pads missing lines with an empty string when one block has more lines than the other
  • Updates the combined output instantly as you type

🔎 The Two Concatenation Modes

Whole block mode (default): The entire Text A is joined to the entire Text B with the separator placed once in between.

Text A:    Hello
Text B:    World
Separator: " - "
Output:    Hello - World

Join line by line mode: Each line of Text A is paired with the line at the same position in Text B, joined by the separator, producing one output line per pair.

Text A:
apple
banana
cherry

Text B:
1
2

Separator: " = "

Output:
apple = 1
banana = 2
cherry =

Notice that since Text B only has two lines, the third pair uses an empty string for the missing value.

⚙️ Options Explained

Separator: Any text you want inserted between Text A and Text B (or between each paired line). Type \n to insert an actual newline, or \t to insert a tab character.

Join line by line: When checked, lines from Text A and Text B are paired up and joined individually instead of merging the two blocks as one continuous chunk.

⭐ Common Use Cases

  • Merging columns: Combine two lists of values (names and IDs, for example) into paired rows
  • Building CSV-style rows: Join two columns with a comma separator to prepare simple tabular data
  • Combining code snippets: Merge two blocks of code or configuration with a newline separator
  • Quick string building: Join a prefix and suffix block of text with any custom glue text

⚠️ Important Notes

  • If "Join line by line" is unchecked, trailing or leading line breaks in Text A or Text B are kept exactly as typed
  • When the two blocks have a different number of lines in line-by-line mode, missing lines are treated as empty strings
  • All processing happens entirely in your browser; no text is uploaded to any server

This tool is also known as

  • merge two texts online
  • text concatenator
  • join text blocks
  • combine two text files
  • join lines from two lists

Frequently Asked Questions

It merges two separate blocks of text, Text A and Text B, into one combined output, with a custom separator inserted between them. You can merge the whole blocks together or join them line by line.

Whole-block mode joins the entire Text A to the entire Text B with the separator placed once in between. Line-by-line mode pairs each line of Text A with the matching line of Text B, joining each pair with the separator to produce one output line per pair.

In line-by-line mode, if one text has more lines than the other, the missing lines on the shorter side are treated as empty strings so every pair still produces an output line.

Yes. Type \n in the separator field to insert an actual newline, or \t to insert a tab character. These escape sequences are automatically converted before concatenation.

Yes. Leave the separator field blank to concatenate Text A and Text B directly next to each other with nothing in between.

Yes. The separator field accepts any text, such as ' - ', ', ', or even a short phrase, and it is inserted exactly as typed between the two blocks or between each paired line.

No. Text A and Text B are used exactly as entered, including any leading or trailing whitespace or blank lines, so you have full control over the exact output.

Yes. Enable 'Join line by line', set the separator to a comma, and paste one column of values into Text A and the other into Text B to quickly produce paired CSV-style rows.

Clear empties both Text A and Text B input boxes as well as the output field, letting you start a fresh concatenation.

No. All concatenation happens entirely in your browser using JavaScript. Your text is never sent to any server, stored, or shared.

Yes. The combined output updates live as you type into either text box, change the separator, or toggle the line-by-line option.

Yes, the Concatenate Text tool is completely free, with no sign-up, no usage limits, and no watermarks added to your output.

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