Six engines, one desktop client, and the tools that actually do the work

Every screen

• Workspace
• Connections
• Data generation
• Database comparison
• Change log
• Settings

• explorer

  Connections and object tree

  Six engines behind one lazy tree: sessions, databases, schemas, then tables, views and indexes — every folder with its count, empty or not. Sort and group the list, tag a connection with a colour, mark it read-only.

• grid

  Data grid

  Server-side paging, sorting and fourteen filter operators. Drag a column edge to resize it, click a row to slide its detail panel in, edit one cell or several fields at once — every write is parameter bound and shown before it runs.

• designer

  Table designer

  The structure page is the editor: rename, retype, flag or drag-reorder the columns and the backend plans the DDL against the live catalogue. Preview and save go through the same planner, so what you read is what runs.

• export

  Database export

  Structure, structure and data, or a single table's rows as CSV / JSON / JSONL / SQL. The backend reads the table and writes the file at the same time, so the progress bar, the byte count and Stop are all real.

• sqlfile

  Run SQL file

  Hand a .sql file to the backend: it reads it from disk, tells you what is inside — the statements that lose data, the ones a read-only connection will refuse, the USE that re-targets the rest — then runs it statement by statement with progress and Stop. No transaction wraps the file, and the window says so.

• datagen

  Data generation

  Fill a table from mock.js templates, one per column, with a placeholder picker that renders a sample value for every entry. A rejected row stops the run, or gets counted and skipped — your call.

• compare

  Database comparison

  Compare two databases of the same engine table by table and generate the script that turns the right one into the left one, ordered create, alter, drop. Only the right side may be read-only — the left is often production.

• codegen

  Code generation

  Turn a table's columns into a class, struct or record in one of eighteen languages, with nullability written the way each language writes it. Java comes with or without Lombok.

• explain

  Explain and format

  Ask the engine how it plans to run a statement without running it, and re-indent a script with the dialect's own grammar. Highlighting is done by the app, not by a lexer library, because quoting rules differ per engine.

• er

  ER diagram

  One namespace on a canvas: tables of the same family in one row, ordered by foreign keys, with the referenced column pair on hover. Search, pan, zoom and export the drawing as a standalone SVG.

• changelog

  Change log

  Every write statement the app ran, with its affected rows and the connection it ran on. The log lives in the data folder — one file per day, rotated, never trimmed — so it opens with no database connected.

• i18n

  English, 简体中文, 繁體中文

  The whole interface is translated, antd components included. Switch it from the settings page, the status bar at the bottom, or — on Windows — the tray menu, and nothing restarts.

• My

  MySQL & MariaDB

  The home turf: TLS, charset and collation when creating a database, partitions, and InnoDB buffer pool plus process list on the overview page.

• Pg

  PostgreSQL

  Several schemas in one database, serial and identity columns, and encoding plus locale when a database is created.

• Lite

  SQLite

  A single file: no server, no account. Attach extra databases, read the pragma values, and browse the file the way the server engines are browsed.

• Mg

  MongoDB

  Collections, documents, indexes and a mongosh-style shell for queries. Document counts, sizes and dbStats on the overview page.

• Ti

  TiDB

  The MySQL wire protocol with TLS, plus a cluster member table from information_schema.CLUSTER_INFO.

• Do

  Apache Doris

  Analytical, and read-only here on purpose: structure, indexes, the data grid, SQL and export all work; there is no table designer, and the app says why instead of failing.

On the roadmap Oracle and SQL Server: the dialect and the placeholder are already in the tree, the DSN and the catalogue queries are not — so they stay off the menu until they are.

• Windows x64 db-manager.exe

  Portable — no installer. WebView2 is required (Windows 10/11 already has it).

• macOS (Intel + Apple Silicon) db-manager-macos-universal.zip

  Unzip and drag db-manager.app into Applications. The build is not signed or notarised: right-click → Open the first time, or run xattr -cr.

• Linux x64 db-manager

  chmod +x db-manager && ./db-manager — needs GTK3 and WebKitGTK 4.0.

• No account, no telemetry, nothing uploaded — the app talks to your databases and nothing else.
• Passwords are only saved when you ask: sealed with AES-256-GCM, with the key in its own file next to the store.
• The change log is plain text. Grep it, archive it, read it in another editor.
• Moving the folder is a copy, a byte-for-byte verification, then a pointer switch — and sessions stay connected while it happens.