Why Choose DBToFile for PostgreSQL to JSON?
- ✅ Cross-Platform Support: Windows, Linux & macOS
- ✅ Two Modes: GUI + CLI for automation
- ✅ Blazing Fast: Millions of rows in minutes
- ✅ 100% Local & Secure
- ✅ JSON, JSON Array, JSONL Support
- ✅ Dynamic Filenames with Date/Time
- ✅ Full Customization & Batch Export
What You Can Export to JSON
1. Export Single PostgreSQL Table to JSON
Convert any PostgreSQL table to clean JSON with preview, column mapping, and encoding rules. 📷
2. Export PostgreSQL Query Results to JSON
Run custom SQL queries and export filtered results directly to JSON. 📷
3. Batch Export PostgreSQL Tables to JSON Files
Export multiple tables to individual JSON files in one operation. 📷
4. Merge Similar PostgreSQL Tables to One JSON
Combine structurally similar tables into a single JSON file. 📷
5. PostgreSQL to JSON Array
Export data as a formatted JSON array for API and application integration. 📷
6. PostgreSQL to JSONL (NDJSON/LDJSON)
Newline-delimited JSON output ideal for big data and stream processing. 📷
7. Dynamic Filenames with Current Date
Auto-generate filenames with timestamp: sales_#yyyy#_#mm#_#dd#.json 📷
Step-by-Step PostgreSQL to JSON (GUI Mode)
Step 1: Connect to Your PostgreSQL DatabaseSelect PostgreSQL as the database type, enter your PostgreSQL server, port, username, password, and target database (support for SSH/SSL), and connect. 📷
Step 2: Choose Your Export TypeTable 📷, Query 📷, Batch All Tables 📷, or Merge Similar Tables 📷
Step 3: Customize JSON OutputSet format (JSON / JSON Array / JSONL), filename (static/dynamic), encoding, columns, and date formats. 📷
Step 4: Export & ViewClick Start Convert, view real-time progress, and open the JSON file instantly. 📷
CLI Mode for Automation & Scheduled Tasks & AI Agents
Save GUI settings as a session, then run via script for fully automated exports. 📷
Automate exports with command-line mode for cron jobs or Windows Task Scheduler:
Or call command-line by AI agents.
Key Features & Customization
- JSON Array with custom root name
- ISO 8601 & custom date/time formatting
- Rename, exclude, and reorder columns
- Error logging and export statistics
- Bulk processing with low resource usage
- Preserve null values, Unicode, and special characters
PostgreSQL to JSON — Quick Facts
- About this database:
PostgreSQL uses double-quoted identifiers and BYTEA for binary data. - Default port:
5432 - Identifier quoting:
"double quotes" - Row limit syntax:
LIMIT n - Date / time types:
timestamp, timestamptz, date, time - Large text type:
TEXT - Binary type:
BYTEA - Command-line equivalent:
pg_dump or COPY ... TO
Common Pitfalls When Exporting PostgreSQL to JSON
- A relational result is flat but JSON is nested - decide whether to emit an array of objects or wrap rows under a key.
- JSON has no date type, so dates land as strings and the consumer has to parse them.
- Very large integers lose precision in some JSON readers because they are parsed as doubles.
- NULL and a missing key are different in JSON - pick one convention or downstream code will break.
- BYTEA columns export as hex escapes rather than raw bytes.
- Arrays and JSONB columns arrive as a single text field and need a second pass to flatten.
FAQ
How long does it take to export PostgreSQL to JSON?100,000 rows in seconds; millions of rows in minutes.
What PostgreSQL versions does DBToFile support?DBToFile support PostgreSQL 9.x, 10, 11, 12, 13, 14, 15, 16, 17, 18.
Can I export on Linux or macOS?Yes, native builds for all major operating systems.
Is my data secure?All conversions run locally — no data is uploaded to any server.
How to use dynamic filenames?Use tags: #yyyy#, #mm#, #dd#, #hh#, #mi#, #ss#.
Does it support JSONL?Yes, select JSON Lines as the target format.
Download DBToFile Today
Start exporting PostgreSQL to JSON in 2 minutes — free trial available, no credit card required.
Version: 2026 | Fully updated for latest OS | Windows/Linux/macOS