JSON formatter
Validate, format, minify and sort JSON locally.
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Using JSON formatter
Paste JSON or open a local JSON file. Choose indentation or minification and optionally sort object keys. Invalid syntax and unsafe integer values are rejected. Duplicate keys keep the last value.
- Enter your content and choose the available settings.
- Review the result and any validation messages.
- Copy or download the result when it is ready.
Limits and checks
Input limits and validation messages are shown in the workspace. Your originals are not overwritten.
Frequently asked questions
What should I check when using json formatter?
Paste JSON or open a local JSON file. Choose indentation or minification and optionally sort object keys. Invalid syntax and unsafe integer values are rejected. Duplicate keys keep the last value.
Is my content sent to a server?
No. Processing runs inside your browser. Optional editor recovery saves a draft on this device only. Read the privacy policy.
Will my original file be changed?
No. Downloaded results are separate copies. Open the finished output before sharing it or deleting an original.