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JSON Formatter and Validator
Validate and format JSON with error positions and indentation controls.
Data formatting workspaceYour data is processed locally in the browser.
Privacy-focused processingBrowser processing is used wherever practical.
25-minute cleanup policyServer files, when required, are removed after completion—not during active work.
JSON, CSV, XML or YAML as applicableMaximum size and exact support are shown inside the tool.
About This Tool
Check JSON syntax and display properly indented output with a useful error location.
How to Use
- Paste JSON into the input editor.
- Choose two spaces, four spaces or tab indentation.
- Review the validation status and formatted output.
- Copy or download the JSON file.
Tool Features
- Syntax validation
- Line and column error display
- Indentation selection
- JSON copy and download
Common Use Cases
Complete repetitive formatting or calculation tasks.
Prepare clean output for websites and documents.
Inspect and verify your result before downloading.
Supported Input and Output
JSON, CSV, XML or YAML as applicable
- Check the tool workspace for its exact file-size limit.
- Browser format support can vary by device and browser version.
- Always review the generated result before important use.
Frequently Asked Questions
Does formatting change my data?
No. Formatting changes whitespace, not valid JSON values or keys.
Security and Privacy Information
Supported processing runs inside your browser whenever practical.
When server processing is required, cleanup starts only after the work completes.
Avoid uploading confidential data unless you understand the displayed processing notice.