How do I beautify JavaScript online?

Paste your code, adjust Prettier options if needed, then click Prettify to reformat spacing, quotes, semicolons, trailing commas, and arrow parens.

Does it work on minified code?

Yes — pasting a minified one-liner and prettifying it will expand it back into readable, indented code.

Is my code sent to a server?

No. The formatter runs entirely in your browser.

How do I format TypeScript online?

Paste your .ts code, adjust Prettier options if needed, then click Prettify. Types, interfaces, generics, and imports are formatted locally in your browser.

No — it only reformats syntax. It doesn't type-check against a project's types.

Is my code sent to a server?

No. Formatting runs entirely in your browser.

How do I format CSS online?

Paste your CSS, click Prettify, and it's reformatted with consistent indentation and one property per line using Prettier.

Does it support SCSS or LESS syntax?

It's tuned for plain CSS. Most SCSS/LESS will format reasonably, but nested-language-specific syntax isn't guaranteed.

Is my CSS sent to a server?

No. Formatting runs entirely in your browser.

How do I format YAML online?

Paste your YAML, click Prettify, and indentation and spacing are normalized using Prettier.

Does it validate my YAML?

Yes — invalid YAML fails to format and shows a parse error instead of guessing.

Is my YAML sent to a server?

No. Formatting runs entirely in your browser.

How do I format C code online?

Paste your C code, click Prettify, and it's reformatted using clang-format (Google style) — the same engine used by real C/C++ codebases.

What formatting style does it use?

Google style is the default, and you can switch to LLVM, Chromium, Mozilla, WebKit, Microsoft, or paste a custom .clang-format YAML config.

Is my code sent to a server?

No. clang-format runs in your browser via WebAssembly — nothing is uploaded.

How do I format C++ code online?

Paste your C++ code, choose a clang-format preset or custom .clang-format YAML if needed, then click Prettify.

Does it support modern C++ (templates, lambdas, etc.)?

Yes — clang-format handles modern C++ syntax including templates, lambdas, and structured bindings.

Is my code sent to a server?

No. clang-format runs in your browser via WebAssembly — nothing is uploaded.

Is there a real VBScript formatter?

No maintained VBScript parser/formatter exists in any major ecosystem. This tool re-indents your code based on block keywords (If/For/Do/Sub/...) — it doesn't reflow spacing or fix syntax.

What does it actually fix?

Only indentation, recomputed from a stack of open If/For/Do/While/Sub/Function/Select Case/With/Class/Property blocks.

Is my code sent to a server?

No. Formatting runs entirely in your browser.

mindcrew.ai

codeformatter

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Mindcrew Tools

Code formatting for the Mindcrew tool network

Format JSON, JavaScript, TypeScript, CSS, YAML, C, C++, and VBScript here, or jump to Markdown conversion, calculators, and AI cost comparisons.

JSON stays on this device. Validation, minifying, key sorting, string escaping, downloads, and the tree view run locally in your browser.

Input

Output

Formatted output will appear here.

JSON tree

Collapsible preview for valid JSON

Prettify, validate, or paste JSON to inspect it as a tree.

Free code formatters for everyday work

Format JSON, JavaScript, TypeScript, CSS, YAML, C, C++, and VBScript without accounts or installs. Pick a language from the sidebar and paste in code — most formatters run entirely in your browser, with nothing uploaded to a server.

Core tools need no accountRuns in your browserFree, ad-supportedPrivacy-first

JSON Formatter

Paste or import JSON above and click Prettify to reformat it with consistent indentation and spacing — free, in your browser, with nothing uploaded to a server. Powered by Prettier.

Validation notes

JSON does not allow trailing commas, comments, unquoted keys, or single-quoted strings. Duplicate keys are accepted by JavaScript parsers, but the last value wins when parsed.

Large files

Formatting runs locally and works best for files your browser can comfortably hold in memory. For very large JSON, minify first only if you need a compact copy.

Need to convert Markdown instead? Try the free Markdown to Word/HTML/PDF converter.

Need to run some numbers? Try the free online calculators.

Frequently asked questions

How do I format JSON online?+

Paste JSON and use Prettify, Minify, Validate, Sort keys, or the JSON string escape tools. Valid JSON can also be inspected in the collapsible tree view.

Does it show where invalid JSON failed?+

Yes. The validator reports a best-effort line and column for syntax errors, including common issues like trailing commas.

Is my JSON uploaded or stored anywhere?+

No. Formatting, validation, minifying, key sorting, string escaping, copying, and downloads run entirely in your browser.

Why codeformatter works well

Small, focused formatting tools that stay free through display advertising instead of accounts, subscriptions, or paywalls.

No accounts

Every formatter opens directly without signup gates.

Private by default

Routine formatting work stays on your device.

Ad-supported

Ads keep the tool free without hiding formatters behind plans.

Maintained

Formatter engines and browser behavior are updated as the suite grows.