Paste
Paste JSON, open a .json file, or try the sample.
JSON Formatter
Format, validate and explore JSON as an easy-to-read grid
Waiting for JSON
Viewer
Your JSON appears here as a grid.
Click any value or field name in the grid to edit it — the JSON on the left updates to match. Click any {…} or […] to open or close it. Lists of objects are shown as tables with one row per item. Everything stays in your browser.
How JSON Formatter works
Check
Errors are found as you type, with the exact line and column.
Explore
Browse it as a grid, then format, minify, copy or download.
Frequently Asked Questions
Is my JSON uploaded to a server?
No. Everything happens in your browser, so private data like API responses and config files never leaves your device.
What is the grid view?
It shows JSON as tables: objects become key and value rows, and lists of objects become a table with one row per item and one column per field. Nested parts open and close with a click.
How do I find an error in my JSON?
The status bar under the editor shows what is wrong and the line and column where it happens. Common causes are a missing comma, a trailing comma, or single quotes instead of double quotes.
Can it handle large files?
Yes. Files of several megabytes work. The grid shows large lists 200 rows at a time so the page stays fast.