Join Lines

Online tool for joining list lines into one string with a space, comma, semicolon, or custom separator.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

Join Lines is a free online tool for merging a multiline list into one string with a chosen separator. It is useful for IDs, SKUs, emails, tags, spreadsheet values, CMS exports, API parameters, JSON arrays, and SQL IN lists. Processing runs locally in your browser and data is not sent to the server.

What it does

Output

Processing

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How to use

Paste a multiline list, IDs, SKUs, emails, tags, table values, or text export.
Choose a separator: space, comma, semicolon, or a custom character.
Configure the output format: plain string, CSV line, JSON array, or SQL IN list.
Copy the result for API, CMS, spreadsheets, SQL queries, JSON, prompts, or text processing.

More about this tool

This tool joins a multiline list into one string with a selected separator. It is useful for preparing IDs, SKUs, emails, tags, product codes, search queries, Excel values, CMS exports, API parameters, JSON arrays, and SQL IN lists. You can choose a preset separator, enter a custom character, ignore empty lines, trim edge spaces, and get output as a plain string, CSV line, JSON array, or SQL IN list.

Runs in the browser
Data is not sent to the server
Joins lines into one string
Includes preset and custom separators
Can ignore empty lines
Supports CSV, JSON array, and SQL IN list formats
Useful for API, CMS, Excel, SQL, and text exports
No registration required

Frequently Asked Questions

How do I join lines into one string?

Paste a multiline list into the input field, choose a separator, and get one string where items are joined with the selected character.

Can I specify my own separator?

Yes. Choose "Custom" and enter any separator: pipe, slash, dot, space, text string, or another character.

What happens to empty lines?

By default, empty lines are ignored so extra commas or separators do not appear in the result. This can be changed in settings.

Can I get a JSON array?

Yes. Choose the "JSON array" format and lines are converted into a string array with proper escaping of quotes and special characters.

Can I prepare a list for SQL IN?

Yes. The "SQL IN list" format outputs values in parentheses, for example ('id1', 'id2', 'id3'). Always validate and escape data on the application side before using it in a real SQL query.

Is this tool good for CSV?

Yes. The "CSV line" format joins items with commas and wraps values in quotes when they contain commas, quotes, or line breaks.

Does the tool remove duplicate lines?

No. This service only joins lines. To remove repeats, use the separate Remove Duplicate Lines tool.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.

How to use

Paste a multiline list, IDs, SKUs, emails, tags, table values, or text export.

Choose a separator: space, comma, semicolon, or a custom character.

Configure the output format: plain string, CSV line, JSON array, or SQL IN list.

Copy the result for API, CMS, spreadsheets, SQL queries, JSON, prompts, or text processing.

More about this tool

Runs in the browser
Data is not sent to the server
Joins lines into one string
Includes preset and custom separators
Can ignore empty lines
Supports CSV, JSON array, and SQL IN list formats
Useful for API, CMS, Excel, SQL, and text exports
No registration required

Frequently Asked Questions

How do I join lines into one string?

Paste a multiline list into the input field, choose a separator, and get one string where items are joined with the selected character.

Can I specify my own separator?

Yes. Choose "Custom" and enter any separator: pipe, slash, dot, space, text string, or another character.

What happens to empty lines?

By default, empty lines are ignored so extra commas or separators do not appear in the result. This can be changed in settings.

Can I get a JSON array?

Yes. Choose the "JSON array" format and lines are converted into a string array with proper escaping of quotes and special characters.

Can I prepare a list for SQL IN?

Yes. The "SQL IN list" format outputs values in parentheses, for example ('id1', 'id2', 'id3'). Always validate and escape data on the application side before using it in a real SQL query.

Is this tool good for CSV?

Yes. The "CSV line" format joins items with commas and wraps values in quotes when they contain commas, quotes, or line breaks.

Does the tool remove duplicate lines?

No. This service only joins lines. To remove repeats, use the separate Remove Duplicate Lines tool.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.