Input151 characters · 6 lines
PRIVATE BROWSER TOOL
JSON Formatter
Format or minify JSON with clear syntax errors. Nothing is uploaded.
Result0 characters · 0 lines
Processed locally on this device.
Unicode-safe UTF-8 handling
PRIVATE BROWSER TOOL
Format or minify JSON with clear syntax errors. Nothing is uploaded.
JSON TOOLS · LOCAL PROCESSING
The JSON Formatter turns compact or inconsistently spaced JSON into a structure that is easier to scan, review, and debug. Choose an indentation size for readable output, or minify the same document when you need a compact payload.
COMMON USES
THREE STEPS
PRIVACY
The operation runs on your device and does not require the input to be uploaded. Copy and download actions happen only when you choose them. Avoid treating encoded output as encryption, and follow your own security requirements for confidential data.
WORKED EXAMPLE
{"name":"Ada","active":true}{
"name": "Ada",
"active": true
}With 2-space indentation, each property is displayed on its own line. Minify produces the compact input shown here.
METHOD & LIMITS
The formatter parses with JSON.parse and serializes with JSON.stringify. It reports syntax errors before formatting.
Parsing can discard duplicate object keys and round numbers outside JavaScript's safe integer range. Keep large identifiers as strings and retain your original file.
References: JSON data interchange format (RFC 8259)
PRACTICAL NOTES
No. It reports the syntax problem so you can correct the source without silently changing its meaning.
Yes. JSON strings containing Hangul, CJK, Arabic, emoji, and other Unicode text remain readable.