How to Convert JSON to OFX: Step-by-Step Tutorial
📋 Open the JSON to OFX Converter and follow along with this tutorial.
Open Tool →Steps
This tutorial walks you through converting a JSON file to OFX using the free FinancialDataTools.com JSON to OFX Converter. The tool processes your file entirely inside your browser — nothing is ever sent to any server.
Try the JSON to OFX Converter — runs entirely in your browser and never uploads your files.
Open the Converter →Step 1: Locate Your JSON File
Find the .json file you want to convert. The file must contain an array of transaction objects (or a single object). Each object should have fields for date, amount, and description. The converter accepts any JSON structure with recognisable financial field names.
Step 2: Open the Converter
Navigate to financialdatatools.com/converters/json-to-ofx/ in any modern desktop browser. No login, account, or installation is required.
The converter opens with two panels side by side: the Source (JSON) panel on the left and the Output (OFX) panel on the right. Both start in their empty placeholder state.
Step 3: Load Your File
There are two ways to load your JSON file:
- Click the green "Open" button in the toolbar and select your file using the system file picker.
- Drag and drop your file onto the left (Source) panel.
The file is parsed immediately. Once loaded, the file name appears in the toolbar, and the stats bar updates to show the total row count and field count. A READY TO CONVERT badge confirms the file is loaded and ready.
Step 4: Review the Source Preview
The left panel renders your transaction data as a scrollable table — field names across the top, data rows below. Use this preview to confirm your file loaded correctly before converting:
- Check that field names appear correctly in the header row
- Verify date and amount columns contain the expected values
- Confirm empty cells show as
NULL - Check the row count in the stats bar matches your expectation
For files with more than 500 rows, the preview is capped at 500 rows. A notice confirms how many rows are being previewed. The full dataset is still converted.
Step 5: Convert to OFX
Click the Convert to OFX button in the toolbar. The converter processes your entire dataset and renders the OFX output in the right panel. After conversion, the status badge changes from READY TO CONVERT to CONVERTED, and the Export OFX button becomes active.
Step 6: Inspect the OFX Output
The right panel displays the full OFX output as plain text. Scroll through it to verify the structure looks correct:
- Each transaction from your source file should appear as a record in the output
- Dates, amounts, and descriptions should match your source data
- The overall OFX structure and header should be complete and valid
Step 7: Export the OFX File
Click the Export OFX button in the toolbar. The browser downloads the OFX file directly to your downloads folder.
The downloaded file is named to match your input file with the extension changed to .ofx. A file named transactions.json downloads as transactions.ofx.
Tip: The exported OFX file contains all converted transactions — not limited to the preview rows. All rows from your original file are included.
Step 8: Reset for Another Conversion
To convert a different file, click the Reset button in the toolbar. This clears the loaded file, the source preview, the OFX output, and all status badges.
Alternatively, click Open again and load a new file without resetting — the new file replaces the previous one automatically.
Privacy reminder: Your file is never uploaded anywhere. All parsing and conversion happens locally inside your browser tab. Closing the tab clears all data from memory immediately.