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JSON Formatter & Validator — Format, Validate & Minify JSON Free Online | Sanle Tech Solutions
Free online JSON formatter, validator, and minifier. Format and beautify JSON instantly in your browser — no signup, no data stored, with collections to organise your files.
What it does
Paste raw JSON and get a clean, indented result instantly. Errors caught in real time.
Features
- Format & beautify JSON
- Minify for production
- Validate & highlight errors
- Save files into collections
- Search large documents
- Copy or download output
Who uses it
Developers debugging APIs, data engineers, and QA reviewing payloads.
Tags
JSON
Formatter
Validator
Minifier
Free
Collections
New Collection
New File
FAQ
What is a JSON formatter?
Takes raw or minified JSON and re-indents it for readability. Also catches syntax errors like missing commas or unmatched brackets.
Is my data sent to a server?
No. Everything runs in your browser. Nothing is uploaded or stored anywhere.
What are collections?
Named groups to organise your JSON files — like folders. Create as many as you need.
Format vs minify?
Format adds indentation for readability. Minify strips whitespace to reduce payload size for APIs or storage.
How do I validate JSON?
Click Validate in the toolbar. The error bar highlights syntax issues with a description of what went wrong.
Can I download the output?
Yes — use the Download button to save the current editor contents as a .json file.
Is there a size limit?
No enforced limit. Very large files may take a moment since everything runs locally in your browser.
Free online JSON formatter, validator, and minifier. Format and beautify JSON instantly in your browser — no signup, no data stored, with collections to organise your files.