JSON Formatter
Pretty-print and validate JSON online, instantly.
Embed this tool on your site
Free — a link back to LoopStook is included.
What is the JSON Formatter?
Format and validate JSON online for free. Paste minified or messy JSON and get clean, indented output — invalid JSON is flagged with a clear error.
How to use the JSON Formatter
- 1
Add your text
Paste or type your content into the JSON Formatter.
- 2
Set any options
Adjust the available options to fit exactly what you need.
- 3
Copy or download the result
The output is generated instantly in your browser — copy it or download it. Nothing is uploaded to a server.
Frequently asked questions
Is the json formatter free?
Yes — it runs entirely in your browser, so it's free, private, and instant. Nothing is uploaded.
More free tools
No signup, no limits — jump straight into another tool.
JSON Minifier
Strip whitespace from JSON to shrink payloads.
XML Formatter
Pretty-print and validate XML online.
HTML Formatter
Pretty-print HTML with proper indentation.
HTML Minifier
Strip comments and whitespace from HTML.
CSS Formatter
Pretty-print CSS with proper indentation.
CSS Minifier
Strip comments and whitespace from CSS.
From other sheets
AI Ad Copy Generator
High-converting ad copy in seconds — headlines, primary text, and CTAs.
ROAS Calculator
Calculate return on ad spend and break-even.
PNG to JPG Converter
Convert PNG to JPG in your browser — free, private, no upload.
YouTube Video & Shorts Downloader
Download YouTube videos and Shorts in HD — MP4 or MP3, free.
Word Counter
Count words, characters, sentences & reading time as you type.
Fake Tweet Generator
Create a realistic tweet screenshot — no login, download as PNG.
Merge PDF
Combine multiple PDFs into one file.
Compress Video
Shrink MP4, MOV & WebM videos without losing quality.
Stick it all together.
Drop your downloads, cut-outs and captions into Design Studio, pick a template and export for social or print.