SQL Diff Tool

Yes for text diffs: paste two scripts or queries and they are compared locally in your browser — free, no signup, nothing uploaded. SQLite schema text diffs work the same way. Free .db file compares stay in the browser up to 50MB / 200,000 rows per table; larger files use a paid server compare.

No. The text comparison happens entirely in your browser using JavaScript. Your SQL never leaves your device, which makes the tool safe to use with production schemas and queries.

sqldiff is the official SQLite command-line utility that compares two .db database files and emits the SQL needed to transform one into the other. This tool compares SQL text — scripts, schemas, migrations and queries — in the browser, with no install. If you want to compare actual .db files here, use the database comparison feature.

Yes. On /sqlite-diff you can paste two .schema exports or upload two .db files for a table-by-table row and schema diff. Schema paste is free in-browser. .db compares are free up to 50MB and 200,000 rows per table; larger files need a paid account.

Yes for script comparison. The diff is dialect-agnostic, so it works with MySQL, PostgreSQL, SQL Server, Oracle, SQLite or any other SQL text — including migration files and stored procedures.

Two scripts with up to 60,000 lines between them get a full line-by-line diff. In our tests, two 5,000-line schema dumps diff in about 2 milliseconds and two 25,000-line dumps in about 10 milliseconds. Between 60,000 and 300,000 lines the comparison switches to a coarser block-level diff so your browser stays responsive. Above 300,000 lines it reports accurate counts of added and removed lines instead of a line-by-line view.

Free: .db files up to 50MB, compared in your browser with nothing uploaded, and up to 200,000 rows per table; every difference within those rows is reported. Paid plans: files up to 200MB and up to 500,000 rows per table, compared on our servers. Every row is compared, up to 50,000 differences per table are sent to your screen, and the complete result can be downloaded. In one of our tests, two 181MB databases with 323,625 rows each were compared in about 14 seconds, not counting upload time. Speed depends heavily on how wide the rows are.

SQL Diff Tool compares SQL scripts side by side in your browser for free, with nothing uploaded. Unlike many online SQL compare tools that only diff text, it also compares SQLite .db files table-by-table (free up to 50MB and 200,000 rows per table) and supports MySQL and schema-focused pages. Paid plans cover larger .db files on our servers.

SQL Diff Tool works with any dialect (MySQL, PostgreSQL, SQL Server, SQLite). Paste the original into the left pane and the changed version into the right to see added, removed, and changed lines. Ignore whitespace and Ignore case options help when only formatting differs. Free for script and query diffs with nothing uploaded.

A free online SQL diff tool lets you paste two SQL scripts or queries and see every added, removed and changed line side by side in the browser. SQL Diff Tool does that with a Myers diff, works with any dialect (MySQL, PostgreSQL, SQL Server, SQLite), needs no signup, and uploads nothing for text compares. It can also compare two SQLite .db files table by table (free up to 50MB and 200,000 rows per table; larger files need a paid account).