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JSON Tools Online

JSON is the default data format for APIs, webhooks, configuration files, and many developer workflows. But raw JSON can be hard to read, easy to break, and time-consuming to debug—especially when it’s minified or deeply nested.

DevToolDock’s JSON tools help you format, validate, minify, and convert JSON without leaving your browser. Whether you’re cleaning up an API response, preparing examples for documentation, or transforming data for a spreadsheet, these tools are built to be fast and developer-friendly.

On this page you’ll find the most useful JSON utilities—plus quick internal links to the full directory on /tools and /all-tools so you can discover more.

If you regularly work with REST APIs, GraphQL responses, or event payloads, the fastest debugging move is to make the data readable first. Once JSON is formatted and valid, you can verify structure, compare versions, and transform it into other formats (CSV/YAML/XML) without rewriting scripts or switching tools.

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Tools included

JSON Tools

JSON Formatter

Format, validate, and beautify JSON with syntax highlighting.

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JSON Tools

JSON Validator

Validate JSON syntax and get clear error messages.

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JSON Tools

JSON to CSV

Convert JSON array to CSV format.

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JSON Tools

CSV to JSON

Convert CSV text to JSON array.

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JSON Tools

JSON to XML

Convert JSON to XML format.

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JSON Tools

JSON Minifier

Minify JSON by removing whitespace and newlines.

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JSON Tools

JSON Pretty Print

Format JSON with indentation for readability.

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File Converters

XML to JSON

Convert XML into JSON format.

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File Converters

JSON to YAML

Convert JSON into YAML.

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File Converters

YAML to JSON

Convert YAML into JSON.

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File Converters

CSV to TSV

Convert CSV into TSV.

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File Converters

TSV to CSV

Convert TSV into CSV.

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File Converters

Base64 to Image

Preview Base64 image data as an image.

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File Converters

Image to Base64

Convert an image file to Base64 (data URL).

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File Converters

Markdown to HTML

Convert Markdown into HTML.

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File Converters

HTML to Markdown

Convert HTML into Markdown.

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File Converters

JSON to TypeScript Interface

Generate TypeScript interfaces from JSON.

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Common use cases

  • Beautify a minified API response so you can quickly inspect nested fields and arrays.
  • Validate JSON before committing fixtures or sending payloads to an endpoint.
  • Minify JSON to reduce payload size when storing or transmitting data.
  • Convert JSON to CSV for quick analysis in spreadsheets or BI tools.
  • Convert JSON to YAML for configuration (CI, Docker, Kubernetes, app settings).

Final thoughts

A simple JSON workflow is: validate → format → transform. Start with the JSON Formatter when you need readability, and switch to the JSON Validator when you only need strict correctness.

When you’re ready to explore beyond JSON, browse DevToolDock’s full directory and categories to build a compact, reliable toolbelt for everyday development.

Pro tip: keep a small set of “daily drivers” bookmarked—formatter, validator, minifier, and one converter. That covers most real-world payload work and keeps your workflow consistent across projects and teams.