SQL Diff Checker

Paste two versions of SQL to compare additions, removals and edited lines with SQL syntax highlighting. The diff runs locally in your browser.

元のテキスト

変更後のテキスト

SQL syntax locked

This page automatically highlights SQL tokens, so you do not need to pick a language before comparing files.

Private local compare

The diff runs in your browser. Source code, API payloads and configuration files are not uploaded to a server.

Split or unified review

Use split view for side-by-side review, unified view for compact patches, and hide unchanged lines for large files.

Compare SQL files online

This SQL diff checker is built for developers who need a fast, private way to compare code and configuration changes. Paste two versions, run the comparison, and review additions, removals and inline edits with SQL syntax highlighting already enabled.

Paste or upload the original SQL file on the left.
Paste or upload the changed SQL file on the right.
Compare the result in split or unified view, then hide unchanged lines when you only need the edited regions.

Private browser-based SQL comparison

The diff runs locally in your browser, which keeps source code, API responses, secrets and configuration files on your device. One recent session may be stored in your browser storage for restore, and you can clear it from the tool at any time.

Common SQL diff workflows

Compare migrations, seed files and query changes.

Review schema edits before applying them.

Check joins, filters and index statements.

SQL syntax highlighting

Highlighting is locked to SQL on this page, so the language selector stays out of the way. The parser focuses on tokens such as queries, schemas, joins, constraints while the diff engine highlights the actual text changes.

.sql

Reference: PostgreSQL SQL documentation

SQL diff checker FAQ

What is a SQL diff checker?

A SQL diff checker compares two versions of SQL content and highlights added, removed and edited lines. This page locks syntax highlighting to SQL, so language tokens are easier to scan while reviewing changes.

Does this SQL diff tool upload my code?

No. The comparison runs in your browser. Your SQL files are not uploaded to a server when you click Compare.

Which SQL file types can I compare?

You can paste or upload plain-text files such as .sql. Any text file can be compared, but this page highlights SQL syntax automatically.

Can I compare large SQL files?

Yes. Large comparisons run in a background worker so the browser stays responsive. Very large files may still take a few seconds on your device.