Want to export data from PostgreSQL table to JSON array?
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- Support Windows, Linux, and macOS.
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Export data from PostgreSQL table to JSON array
Login to PostgreSQL -> Choose PostgreSQL table -> Set JSON array file options -> Export PostgreSQL to JSON array
Choose PostgreSQL and logon.
“Export From Table” for “PostgreSQL to JSON array”.
Select JSON file type.
1. Choose PostgreSQL table.
2. Set JSON array file options.
3. Set rows options.
4. Export PostgreSQL data to JSON array.
After exporting, you can view output JSON array file.
More about PostgreSQL to JSON converter
Download Withdata DBToFile
Windows 64 bit
Windows 32 bit
Linux .deb (For Debian, Ubuntu) 64 bit
Linux .rpm (For Red Hat, Fedora, SUSE) 64 bit
MacOS 64 bit
PostgreSQL → JSON Array reference
Type mapping
| Value kind | in PostgreSQL | in JSON Array |
|---|---|---|
| Int | integer | 1234 (number) |
| Bigint | bigint | 9007199254740993 |
| Decimal | numeric(p,s) | 1234.56 (number) |
| Float | double precision | 1.234e10 (number) |
| Text | varchar(n) | "text" (string) |
| Long text | text | "multi-line\ntext" (escaped newline inside a string) |
| Date | date | "2026-09-18" (string) |
| Datetime | timestamp | "2026-09-18T14:30:00Z" (string) |
| Binary | bytea | "base64:..." (string) |
| Boolean | boolean | true / false (boolean) |
| JSON | jsonb | nested object or array, kept as structure |
Dialect differences
PostgreSQL is a database server and JSON Array is a file format, so the gap is wider than a dialect difference - the rows below are where values and structure stop lining up.
| Property | in PostgreSQL | in JSON Array |
|---|---|---|
| port | 5432 | — |
| identifiers | "double quotes" | Double quotes; backslash escapes |
| row limit | LIMIT n | — |
| dates | timestamp, timestamptz, date, time | No date type: dates arrive as strings and the reader must p... |
| long text | TEXT | — |
| binary | BYTEA | Not supported natively - base64 inside a string |
| separator | — | Braces and commas |
| encoding | — | UTF-8 by definition |
| typing | — | string, number, boolean, null, object, array - no date type |
| shape | Tables of rows and columns | Nested objects and arrays |
| ceiling | — | Whole document is usually parsed into memory |
Command line
| Side | Command |
|---|---|
| PostgreSQL | pg_dump or COPY ... TO |
| PostgreSQL (load) | COPY ... FROM |
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