JSON Formatter
Format, minify, and validate JSON.
Format and validate JSON instantly
ToolsOfWeb’s JSON Formatter helps you clean up messy JSON, validate syntax, and generate a readable, pretty-printed output. Paste JSON into the input field and the tool parses it locally in your browser—no backend required. Choose an indentation level (2/4/8 spaces), format to make it readable, or minify to create a compact one-line JSON string. You can also copy the formatted output in one click for quick sharing or debugging. If the JSON is invalid, you’ll see an error so you can fix missing commas, quotes, or brackets. This tool is ideal for developers, QA, and anyone working with APIs, configs, or JSON logs.
FAQs
Is my JSON sent to a server?+
No. Formatting and validation happen locally in your browser.
Can I format huge JSON files?+
Very large JSON may slow down depending on device memory. If it’s slow, try formatting smaller chunks.
What does “minify” do?+
Minify removes whitespace and line breaks to create a compact JSON string.