Beautify and minify instantly
Switch between readable and compact output without leaving the page. One click controls keep the workflow fast while still giving you precise toggles for sorting keys, validating syntax, and copying results.
Idle.
Formatted output
Pretty printed JSON will appear here.
Tree view
Use Format to render an interactive tree.
Tip: Drag the corner of the editors to resize if you are formatting very large payloads.
How to use this JSON formatter
- Paste JSON into the editor or click Load sample for a ready made payload.
- Toggle Sort keys if you want alphabetical keys before formatting.
- Click Format for pretty print output or Minify for compact output.
- Review the tree view to inspect nested keys, then copy the result for documentation or debugging.
The formatter validates syntax as it runs, surfaces the first error with an exact column, and never sends data across the network so you can safely format API responses or log files.
Key features
Tree explorer
Visualize nested objects, arrays, and scalars in a collapsible tree so you can scan complex payloads faster than reading blocks of text.
Privacy first processing
All logic runs in your browser. No uploads, tracking pixels, or accounts required, matching the expectations developers have for modern formatter tools.
Clipboard friendly
Copy the formatted output or download it as a file for handoff to teammates, bug reports, or documentation.
Popular use cases
API payload reviews
Format responses from staging and production APIs to confirm schema parity before deployment.
Log inspections
Beautify structured logs captured from edge workers or microservices to track down anomalies quickly.
Config clean up
Reformat JSON based feature flags, Terraform state fragments, or CMS exports before storing them in Git.
Teaching and demos
Use the tree view to explain JSON basics to students or non technical stakeholders.
JSON formatter FAQ
Does this tool send my JSON to a server?
No. The formatter runs entirely in your browser using standard web APIs, so your payloads remain private.
Can I format really large JSON files?
Yes. Performance depends on your device memory, but multi megabyte payloads are fine. Resize the editor and disable tree view if you only need the text output.
How do I keep keys sorted?
Enable the Sort keys toggle before running Format or Minify. Keys are then alphabetized for stable diffs in Git.
Can I download the formatted JSON?
Use your browser save dialog (Cmd or Ctrl + S) after clicking inside the output, or copy the text and paste into your editor of choice.