Database viewer: choose a tool for the data you have
Start with what you have: a database file, a server connection or a SQL export. That decides which database viewer you need. Once the format is right, you can compare how easily each tool lets you open tables and work with the data.
Identify your input
- A SQLite database is usually a local file. Open it with a SQLite-aware reader.
- PostgreSQL, MySQL and MariaDB typically need a server address and database credentials.
- A MongoDB connection exposes collections and documents, rather than SQL tables.
- A SQL file is a script. Reading it does not require executing it.
Check which engines a “SQL viewer” supports before installing it. Start with the engine that created your data. A file extension alone is weaker evidence than the application’s export documentation.
This guide covers inspecting databases you are authorized to access. It is not a public-record, domain-ownership or WHOIS lookup service.
Compare free viewers by task
DB Browser for SQLite is an open-source choice for SQLite files. pgAdmin focuses on PostgreSQL administration. Neither name means “opens every database format.” For a multi-engine desktop workflow, compare the actual connection types and platform features instead of choosing by the longest feature list.
plainDB supports PostgreSQL, Supabase’s PostgreSQL database, MySQL/MariaDB and SQLite on Mac and Windows. MongoDB is supported on Mac and Windows. It offers a trial, not a permanently free licence. See the feature matrix and pricing terms.
Try it with your own workflow
- Open a non-production database with the same engine and authentication method as your real workload.
- Find one table or collection without already knowing its exact name.
- Inspect a row containing a date, missing value and long text.
- Apply a filter and verify the result against a known example.
- Export a small result and compare its count and values.
- Reconnect and confirm that the saved connection still points to the intended environment.
Prefer the tool whose behavior you can explain. A fast-looking grid is less useful if you cannot tell whether it shows all rows, a page or a cached result.
Use the right permissions
A read-only switch is helpful, but server permissions enforce access. Use a role that can read only the required data. For files, preserve a consistent original before experimenting. A “reader” that can edit is not automatically unsafe; it simply needs a deliberate inspection workflow.