Free SQL Escape Tool Online

Input

Mode:

Output

What is SQL Escaping?

Ever built a SQL query with user input and then had it blow up because someone typed a name like O'Brien? That apostrophe breaks the query — and worse, without escaping, it opens the door to SQL injection attacks, one of the most common web vulnerabilities listed in the OWASP Top 10. SQL escaping is the process of making string values safe to embed in SQL queries by converting special characters. The classic fix: double up single quotes so O'Brien becomes O''Brien. While parameterized queries (prepared statements) are the gold standard for preventing SQL injection, sometimes you genuinely need manual escaping — legacy systems, dynamic SQL generation, one-off data fixes. This tool handles it cleanly. For SQL dialect references, see the PostgreSQL string syntax docs and the MySQL string literals guide.

The most common escape in SQL is doubling single quotes: a single quote ' becomes ''. Backslashes may also need escaping depending on the database.

How to Use the SQL Escape Tool

Paste your SQL string

Paste the SQL string you want to escape into the input editor on the left.

Choose a mode

Select Escape to escape special characters or Unescape to reverse the escaping.

Copy or download

Copy the result to clipboard or download it as a .sql file.

SQL Escaping Example

Here is an example of SQL string escaping:

Raw SQL String

Input SQL

Escaped SQL String

Escaped SQL

When Does SQL Escaping Matter?

Always escape user-supplied input before including it in SQL queries to prevent SQL injection attacks. This is a fundamental security practice.

For formatting your SQL queries, try the SQL Formatter tool.

Frequently Asked Questions

What characters does SQL escaping handle?

Single quotes ' are doubled to '' (standard SQL). Backslashes \ are doubled to \\ (MySQL, some others). This covers the most common cases across MySQL, PostgreSQL, SQLite, and SQL Server.

Should I use SQL escaping instead of parameterized queries?

No — parameterized queries (prepared statements) are always the preferred approach for new code. SQL escaping is useful when you're working with legacy systems, stored procedures, or need to sanitize data in bulk outside of application code.

Does this tool work for MySQL, PostgreSQL, and SQL Server?

Yes for common cases. Single-quote doubling is standard across all major databases. Backslash escaping is MySQL-specific — PostgreSQL uses E'...' escape strings or standard doubling. Always check your database's documentation for edge cases.

Is my SQL data sent to a server?

No. All processing runs entirely in your browser using JavaScript. Your SQL strings never leave your device — there's no backend, no logging, no storage.

What is SQL injection and how does escaping help?

SQL injection is an attack where malicious input breaks out of a SQL string and executes unintended commands. Proper escaping prevents the injected characters from being interpreted as SQL syntax.