Format JSON
Beautify JSON with readable indentation directly in your browser.
Related Tools
JSON Validator
Validate JSON in your browser and see line and column errors when parsing fails. When valid, review a formatted JSON preview instantly.
Compress JSON
Minify JSON online in your browser. Remove whitespace from JSON data for smaller payloads, API responses, and production files.
Compress CSS
Minify CSS online in your browser. Remove whitespace and comments to create smaller production-ready stylesheets.
Compress HTML
Minify and compress HTML code. Remove whitespace, comments, and optimize for production. Free online HTML compressor.
Compress JavaScript
Minify and compress JavaScript code by 30-60%. Remove whitespace, comments, and optimize for production. Free online JS minifier.
Compress XML
Minify and compress XML data. Remove whitespace and optimize for smaller file size. Free online XML compressor.
About JSON Formatter
JSON Formatter makes JSON easier to read by adding indentation and line breaks while keeping the data unchanged. It is useful for API responses, configuration files, debugging, and code review. Formatting happens in your browser so sensitive JSON stays local. Whether you are optimizing for the NBN, preparing myGov submissions, or sharing files across Australia's vast distances, this tool keeps your files light and quick to transfer — even on regional, fixed-wireless, and satellite connections, with no upload required.
Made for Users in Australia
Australian internet ranges from fast NBN fibre in the capitals to satellite and fixed-wireless in regional and remote areas. Keeping files small is essential for reliable sharing across the NBN, for uploads to myGov and state services, and for delivering content to audiences on Telstra, Optus, and Vodafone mobile networks across vast distances.
- myGov and state government portals enforce upload limits — compress scanned IDs and documents before lodging them.
- For regional users on fixed-wireless or satellite NBN, smaller files mean fewer timeouts on slower, higher-latency links.
- Australian mobile plans often include data caps; pre-compressed media saves data for end users on the go.
- When sharing with New Zealand and Southeast Asia, smaller attachments transfer more reliably across trans-Tasman links.
How to Format JSON Online
-
1
Paste JSON into the editor
Copy your JSON object or array into the input panel.
-
2
Choose indentation and format
Pick the indentation size you want and run the formatter to generate readable output.
-
3
Copy or download the result
Review the formatted JSON, then copy it or save it as a JSON file.
Frequently Asked Questions
Does formatting change my JSON data?
No. Formatting only changes whitespace and indentation, not the keys, values, or structure.
Can I choose different indentation sizes?
Yes. You can switch between several indentation sizes before formatting the JSON output.
Is this JSON formatter private?
Yes. The formatting runs locally in your browser, so your JSON is not sent to our servers.
What happens if the JSON is invalid?
The tool shows that the JSON is invalid and reports the error location when the browser provides it.
Can I compress files for myGov and state government portals?
Yes. myGov and state services often limit document sizes. Our tools help you get scans and forms under those limits before you upload them.
Will this work on slow regional or satellite NBN?
Yes. Because files are processed locally and never uploaded, the tool works well even on fixed-wireless and satellite connections where upload speeds are limited.
Does it respect my data cap?
Absolutely. Since nothing is uploaded, you only use data for the final, smaller download — ideal for Australians on metered mobile and NBN plans.
What file formats are supported?
We support PNG, JPG, WebP, AVIF, GIF, BMP, PDF, and many more. Check each tool page for its specific format support.
Why Choose Let Compress?
- No upload — saves your NBN and mobile data allowance
- 100% free, no sign-up — no subscriptions or hidden fees
- Reliable on slower regional, fixed-wireless, and satellite NBN connections
- Batch processing for busy Australian workflows
- Works in any modern browser — nothing to install
- Privacy by design — your files stay on your device
Learn More About File Compression
Explore these authoritative resources to deepen your understanding of file compression and optimisation.
MDN Web Docs: Image Optimisation
Comprehensive guide on image optimisation for web performance by Mozilla.
Google Web Fundamentals: Image Optimisation
Best practices for image optimisation from Google's web performance team.
W3C WebP Specification
Official W3C specification for the WebP image format.