The same student, score values and active flag in a readable JSON object. Minifying should preserve those values, not turn them into Python syntax.
WORK WITH DATA · FREE PYTHON TOOL
Python JSON Formatter, Validator & Minifier
Format, validate or minify JSON with clear parsing errors, file import and export, and private processing in your browser.
Free to useNo sign-upRuns in your browser
PyPython JSON ToolPrivate browser processing
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Your result will appear here.
A WORKED TASK
Inspect JSON without confusing it with a Python dictionary
Paste the student example and choose Format. Its object contains a name, three scores and the JSON value true. Minify removes presentation whitespace; validation checks the JSON grammar. Python-style single quotes, True and trailing commas are not valid JSON.
Despite the collection name, this utility uses native browser JSON processing and does not need to download Python. It does not validate data against a JSON Schema or prove that a field is correct.
What to check
- Use double-quoted keys and strings, and lowercase true, false and null.
- If a parse error points at a comma, check for an extra comma at the end of an array or object.
- JSON numbers are handled by JavaScript here. Very large integer identifiers should be strings if exact digits matter.
TESTED & REVIEWED
Know what this tool does—and where to double-check
- Reviewed by
- HTML Online Viewer project
- Last reviewed
- Processing
- Code and supported files are processed in this browser tab. Runtime tools download Python WebAssembly, but do not intentionally upload your source.
- Important limitation
- The browser runtime is intentionally isolated and may not include every desktop package, system command or network feature. Verify production programs in their target Python environment.
EXAMPLE INPUT
Start small, then use your own data
JSON data
{"student":"Amina","scores":[82,91,76],"active":true}The same student, score values and active flag in a readable JSON object. Minifying should preserve those values, not turn them into Python syntax.
COMMON QUESTIONS
Python JSON Tool FAQ
Does this upload my code or files?
No. Processing happens locally in your browser. Runtime tools download Python itself, but your source is not sent to our server.
Why can the first Python run take longer?
The browser downloads and starts the Python WebAssembly runtime. Later runs in the same tab are normally much faster.
Can I stop a program that takes too long?
Yes. Runtime tools show a Stop button while Python is working. Stopping terminates the isolated worker and a clean runtime starts when needed.