Does this protect my application from SQL injection?

No, it only rewrites literal values into placeholders for readability and reuse. Real protection against injection comes from your database driver's prepared statements or parameter binding, not from text substitution in a browser tool.

What placeholder styles are available?

Four styles: @p1 (SQL Server), :p1 (Oracle), $1 (Postgres), and ? for driver-agnostic positional placeholders, selectable from the Style dropdown above the input.

Does it parameterize identifiers like table or column names?

No, only string and numeric literals are replaced. Table names, column names and keywords are left in the query exactly as written, since those cannot be bound as parameters in SQL anyway.

What happens to the original quotes around string values?

Quotes are stripped from the extracted value in the parameters list, and any doubled single quotes inside the literal are collapsed back to one, matching standard SQL string escaping.

SQL Parameterizer

Replace inline literals in a SQL query with parameters and extract their values, locally.

Local, Runs entirely in your browser, your data never leaves your device.

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Pull literal values out of a query into parameters

When you copy a query straight out of application logs or a query history panel, the actual customer ID, status string or amount is baked into the text as a literal. This tool tokenizes the query, replaces each string or number literal with a placeholder in your chosen style, and lists the extracted values as JSON so you can reuse the query as a template. It runs locally, so the literal values, which are often real production data, never leave your browser.

How to use the SQL Parameterizer

Paste a SQL query into the left panel, or start from the loaded example.
Choose a placeholder style from the Style menu: @p1, :p1, $1, or plain ? positional markers.
Read the parameterized query on the right, with each literal replaced by a placeholder.
Copy the Parameters JSON below it to see the extracted values in placeholder order.

The tokenizer distinguishes quoted string literals from bare numbers so digits inside an identifier or a quoted string are left alone; it also unescapes doubled single quotes ('') inside strings before listing the value.

This is a formatting aid for pulling values out of a query, not a defence against SQL injection. Building parameterized queries safely in your application still requires your database driver's own prepared-statement or parameter-binding API.

Frequently asked questions

Does this protect my application from SQL injection?: No, it only rewrites literal values into placeholders for readability and reuse. Real protection against injection comes from your database driver's prepared statements or parameter binding, not from text substitution in a browser tool.
What placeholder styles are available?: Four styles: @p1 (SQL Server), :p1 (Oracle), $1 (Postgres), and ? for driver-agnostic positional placeholders, selectable from the Style dropdown above the input.
Does it parameterize identifiers like table or column names?: No, only string and numeric literals are replaced. Table names, column names and keywords are left in the query exactly as written, since those cannot be bound as parameters in SQL anyway.
What happens to the original quotes around string values?: Quotes are stripped from the extracted value in the parameters list, and any doubled single quotes inside the literal are collapsed back to one, matching standard SQL string escaping.