JSON Formatter
Format, validate, beautify, minify, sort, fix, compare, and view JSON online with tree view, error checking, and client-side privacy. 100% client-side — your data never leaves your browser.
What is this tool?
Quick Answer: What is a JSON Formatter?
Use a JSON Formatter when you need to format, validate, beautify, minify, sort, or inspect JSON data in a readable structure. This tool helps developers fix JSON syntax issues, view nested objects, and copy clean formatted output. It acts as a comprehensive JSON utility that parses your data locally, detects errors like missing quotes or trailing commas, and provides a syntax-highlighted tree view for easier inspection.
JSON Formatter Example
Unformatted JSON:
{"name":"John","age":30,"city":"New York","skills":["JavaScript","React"]}Formatted JSON:
{
"name": "John",
"age": 30,
"city": "New York",
"skills": [
"JavaScript",
"React"
]
}Is JSON Formatter Safe?
Yes, your data is processed entirely client-side. We never send your pasted JSON to a server. It is not stored in localStorage, nor is it included in shareable URLs or analytics. However, as a best practice, you should always avoid pasting real production secrets or API keys into any online tool.
How to format JSON in your Editor
- VS Code: Use the shortcut
Shift + Alt + F(Windows) orShift + Option + F(Mac). - Notepad++: You need to install the "JSTool" or "JSON Viewer" plugin from the Plugin Admin to format JSON.
- Sublime Text: Install the "Pretty JSON" package via Package Control, then press
Ctrl + Alt + J. - IntelliJ IDEA: Press
Ctrl + Alt + L(Windows) orCmd + Option + L(Mac) to reformat code.
Note: This web-based JSON Formatter acts as a great alternative if you cannot install plugins or extensions on a restricted work computer.
How to Use This Tool
- Paste or Upload: Paste your unformatted JSON into the editor, or upload a
.jsonfile. - Format and Validate: The tool will automatically format it. If there are syntax errors, they will be highlighted with line numbers and explanations in plain English.
- Sort or Minify (Optional): Click "Sort Keys" to alphabetize your JSON, or "Minify" to compress it into one line by removing whitespace.
- Copy or Download: Once formatted, click the copy button or download the formatted data as a new
.jsonfile.
Frequently Asked Questions
What is a JSON Formatter?
How do I format JSON online?
Is this JSON Formatter free?
Is this JSON Formatter safe? Does it store my data?
How do I fix invalid JSON?
Can I sort JSON keys alphabetically?
Can I format large JSON files?
How do I format JSON in VS Code?
How We Keep Your Configs Safe & Valid
Built-in Error Checking
Every file is checked against official rules. We catch missing fields and bad syntax. YAML indentation errors are flagged right away. Kubernetes, Terraform, and Docker specs are all covered. API versions and labels are verified too. You get valid output every time you generate.
100% Private & Local
All tools run in your browser only. Your API keys never leave your machine. We do not use any tracking scripts. No data is sent to any server. Passwords and secrets stay on your device. Crypto operations use the Web Crypto API. Your privacy is fully protected at all times.
Secure Settings by Default
Configs use safe defaults out of the box. Containers run as non-root users. Root filesystems are set to read-only. Dangerous Linux capabilities are dropped. Network policies limit pod-to-pod traffic. TLS 1.3 is enabled for web servers. Security headers are added where needed.
Ready for CI/CD & Git
Output files are ready for your Git repo. Use them with ArgoCD, Flux, or GitHub Actions. Files use clear formatting and comments. Code review is easy for your team. Indentation and key order are consistent. Test in staging before going to production. Every file is clean and well-structured.
Infrastructure as Code
Store configs in Git alongside your code. Terraform modules include typed variables. Backend configs support remote state locking. Outputs work across multiple modules. Ansible playbooks use clear task steps. Chef and Puppet configs are also supported. Every file works with version control tools.
Monitoring & Tracing
Set up Prometheus with auto-discovery rules. Create Grafana dashboards with template variables. Add alerting rules with severity labels. Use OpenTelemetry for trace collection. Forward logs to Loki or Elasticsearch. Connect to Jaeger or Tempo for tracing. Monitor metrics, logs, and traces together.
Container & Docker Safety
Dockerfiles use multi-stage builds for small images. Base images are pinned to exact versions. Dev files are excluded from final images. Health checks are added for orchestrator use. Containers switch to non-root users. Docker Compose uses named volumes and networks. Resource limits are set in deploy configs.
Multiple Output Formats
Export as YAML, JSON, HCL, or TOML. Kubernetes uses YAML with proper separators. Terraform uses HCL with correct escaping. JSON output has consistent indentation. Copy to clipboard with one click. Preview output with syntax highlighting. Line numbers help you review quickly.