LazyDevKit
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JSON Parser & Converter

Format, minify, repair, and convert JSON to TypeScript, JavaScript, PHP, Python, Go, YAML, TOML, ENV, CSV, Markdown, XML, and more.

Input

Standard JSON
Flat object with Unicode escapes — try TOML / ENV
JSON-like with comments, single quotes, trailing commas
JavaScript object / const / export default
Nested structure — try Tree view
Array of flat objects — try CSV, Markdown, XML
Open a .json file

Limits: up to 2,000,000 characters, file size 5.0 MB

0 characters / 0 B / Detected: empty
Output

Output: unknown / 0 characters / 0 B

Processing Notes

  • Chinese is preserved by default; enable unicode escaping only when you want \uXXXX output.
  • Relaxed input is normalized first, then validated by the standard JSON parser.
  • All processing runs locally in the browser.
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What this tool does

Paste JSON or JSON-like text to instantly format, minify, or convert it into TypeScript, Python, Go, YAML, CSV, and more. Control how unicode characters are handled in the output.

Supported handling

Supports standard JSON, JSON-like content with comments or trailing commas, single-quoted strings, \' escape repair, unquoted key quoting, and unicode escape decoding.

Local browser processing

JSON parsing and conversion run in your browser. The input is not actively uploaded to a server.

How to use it

Paste JSON or JSON-like content into the input panel, or import / drag a .json file into the textarea.

Select an output mode: Pretty or Minify to keep JSON format, or choose TypeScript, JavaScript, PHP, Python, Go, YAML, TOML, ENV, CSV, Markdown, or XML to convert.

Adjust options in the settings panel as needed — indent size, key sorting, unicode handling, variable name, export declaration, or format-specific settings.

Review the Output panel, then copy or download the result.

FAQ

Is the data uploaded to a server?

No. JSON parsing, repair, and output generation happen locally in your browser.

Can Chinese characters stay readable instead of becoming \uXXXX?

Yes. Chinese is preserved by default. Turn on unicode escaping only when you want Chinese and other non-ASCII characters emitted as \uXXXX.

Does it support relaxed JSON syntax like comments or trailing commas?

Yes. Single-quoted strings, trailing commas, comments, and unquoted keys are all handled automatically — no configuration needed.

Can it convert JSON to TypeScript, Python, or other code formats?

Yes. Switch the output mode to TypeScript, JavaScript, PHP, Python, or Go to generate ready-to-use code with proper variable declarations and type definitions.

Can I download the result?

Yes. The output panel includes copy and download buttons, and the download filename can be customized.