How does PostgreSQL hash passwords?

PostgreSQL's MD5 method stores the password as md5 + MD5(password + username). The username acts as a salt. Newer PostgreSQL versions (10+) support SCRAM-SHA-256 which is much more secure.

What is the md5 prefix in a PostgreSQL password?

The literal string 'md5' is prepended to the hex-encoded MD5 hash to create the stored password string. Example: md5a5bfd3aa...72c, where the hash is MD5(password + username).

PostgreSQL Password Generator

How to Use postgres-password

Paste or enter your input into the text field.
Configure any options (format, delimiter, encoding, or mode) using the controls above the output.
The result updates instantly — no submit button required for most operations.
Click Copy or Download to take the output to your next step.

Generate PostgreSQL MD5 password hashes (md5 + hash of password + username). Completely free and browser-only: your data never leaves your device, no uploads involved.

How postgres-password Works

postgres-password is a browser-side security utility built for speed and simplicity. Paste your input and the result appears within milliseconds. The tool handles edge cases — empty inputs, special characters, large datasets — without crashing or producing silent incorrect output. If you need a related operation, check the Related Tools section below.

Accepts large inputs — no size limits imposed by this tool
Handles edge cases: empty fields, special characters, and Unicode
Copy-to-clipboard and file download for every output
Works on Chrome, Firefox, Safari, and Edge without any extensions

Frequently Asked Questions

What does postgres-password do?

postgres-password generate postgresql md5 password hashes (md5 + hash of password + username). Results appear immediately — no page reloads, no waiting for a server response.

What input does postgres-password accept?

Paste text directly into the input field, or type your data. Most operations handle Unicode, special characters, and multi-line inputs without issue.

How large an input can I process?

There is no hard limit imposed by this tool. Very large inputs (multi-MB text) process within your browser's available memory. For files larger than 50 MB, a command-line tool may be faster.

Can I download the output?

Yes — every output panel includes a Copy to Clipboard button and a Download as file option. Outputs are saved as plain text or the appropriate file format for the operation.

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PostgreSQL Password Generator online

Generate PostgreSQL MD5 password hashes (md5 + hash of password + username) — runs in your browser